1
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Jung JK, Lee JH, Jeon SK, Tak NH, Chung NK, Baek UB, Lee SH, Lee CH, Choi MC, Kang HM, Bae JW, Moon WJ. Correlations between H 2 Permeation and Physical/Mechanical Properties in Ethylene Propylene Diene Monomer Polymers Blended with Carbon Black and Silica Fillers. Int J Mol Sci 2023; 24:ijms24032865. [PMID: 36769186 PMCID: PMC9917398 DOI: 10.3390/ijms24032865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 01/17/2023] [Accepted: 01/30/2023] [Indexed: 02/05/2023] Open
Abstract
H2 permeation in peroxide-crosslinked EPDM blended with carbon black (CB) and silica fillers was studied at pressures ranging from 1.2 MPa to 90 MPa via the volumetric analysis technique. H2 uptake in the CB-filled EPDM revealed dual-sorption behaviors via Henry's law and the Langmuir model, which were attributed to H2 absorption by the polymer chains and H2 adsorption at the filler interfaces, respectively. Additionally, single-sorption mechanisms were observed for neat EPDM and silica-blended EPDM according to Henry's law, indicating H2 absorption by the polymer chain. The linear decreases in the diffusivity with filler content for the silica-blended EPDMs were attributed to increases in the diffusion paths caused by the filler. Exponential decreases in the diffusivity with increasing filler content and in the permeation with the physical/mechanical properties for CB-filled EPDMs were caused by decreases in the fractional free volume due to increased densities for the EPDM composites. Moreover, good filler-dependent correlations between permeability and density, hardness, and tensile strength were demonstrated for EPDMs used as sealing materials for O-rings. From the resulting equation, we predicted the permeation value without further measurements. Thus, we can select EPDM candidates satisfying the permeation guidelines used in hydrogen infrastructure for the future hydrogen economy.
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Affiliation(s)
- Jae K. Jung
- Korea Research Institute of Standards and Science, Hydrogen Energy Materials Research Center, Daejeon 34113, Republic of Korea
- Correspondence:
| | - Ji H. Lee
- Korea Research Institute of Standards and Science, Hydrogen Energy Materials Research Center, Daejeon 34113, Republic of Korea
| | - Sang K. Jeon
- Korea Research Institute of Standards and Science, Hydrogen Energy Materials Research Center, Daejeon 34113, Republic of Korea
| | - Nae H. Tak
- Korea Research Institute of Standards and Science, Hydrogen Energy Materials Research Center, Daejeon 34113, Republic of Korea
| | - Nak K. Chung
- Korea Research Institute of Standards and Science, Hydrogen Energy Materials Research Center, Daejeon 34113, Republic of Korea
| | - Un B. Baek
- Korea Research Institute of Standards and Science, Hydrogen Energy Materials Research Center, Daejeon 34113, Republic of Korea
| | - Si H. Lee
- Department of Biochemical and Polymer Engineering, Chosun University, Gwangju 61452, Republic of Korea
| | - Chang H. Lee
- Department of Biochemical and Polymer Engineering, Chosun University, Gwangju 61452, Republic of Korea
| | - Myung C. Choi
- Rubber Research Division, Korea Institute of Footwear & Leather Technology, Busan 47154, Republic of Korea
| | - Hyun M. Kang
- Rubber Research Division, Korea Institute of Footwear & Leather Technology, Busan 47154, Republic of Korea
| | - Jong W. Bae
- Rubber Research Division, Korea Institute of Footwear & Leather Technology, Busan 47154, Republic of Korea
| | - Won J. Moon
- Gwangju Center, Korea Basic Science Institute, Gwangju 61186, Republic of Korea
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2
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Polymorphism of poly(2,6-dimethyl-1,4-phenylene) oxide (PPO): Co-crystalline and nanoporous-crystalline phases. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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3
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Consolati G, Nichetti D, Quasso F. Free Volume Expansion in some
Polybutadiene‐Acrylonitrile
Rubbers: Comparison between Theory and Experiments. POLYM INT 2022. [DOI: 10.1002/pi.6431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Giovanni Consolati
- Department of Aerospace Science and Technology Politecnico di Milano, Via LaMasa, 34 20156 Milano Italy
- INFN, Sezione di Milano, via Celoria, 16 20133 Milano Italy
| | | | - Fiorenza Quasso
- Department of Aerospace Science and Technology Politecnico di Milano, Via LaMasa, 34 20156 Milano Italy
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4
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Gas barrier effect of 3-phenylpropionyl group on cellulose ester membranes. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2021. [DOI: 10.1016/j.carpta.2021.100165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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5
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Nabil M, Mahmoud KR, Nomier R, El-Maghraby EM, Motaweh H. Nano-Porous-Silicon Powder as an Environmental Friend. MATERIALS 2021; 14:ma14154252. [PMID: 34361446 PMCID: PMC8347106 DOI: 10.3390/ma14154252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/12/2021] [Accepted: 07/19/2021] [Indexed: 12/01/2022]
Abstract
Nano-porous silicon (NPS) powder synthesis is performed by means of a combination of the ultra-sonication technique and the alkali chemical etching process, starting with a commercial silicon powder. Various characterization techniques {X-ray powder diffraction, transmission electron microscopy, Fourier Transform Infrared spectrum, and positron annihilation lifetime spectroscopy} are used for the description of the product’s properties. The NPS product is a new environmentally friendly material used as an adsorbent agent for the acidic azo-dye, Congo red dye. The structural and free volume changes in NPS powder are probed using positron annihilation lifetime (PALS) and positron annihilation Doppler broadening (PADB) techniques. In addition, the mean free volume (VF), as well as fractional free volume (Fv), are also studied via the PALS results. Additionally, the PADB provides a clear relationship between the core and valence electrons changes, and, in addition, the number of defect types present in the synthesized samples. The most effective parameter that affects the dye removal process is the contact time value; the best time for dye removal is 5 min. Additionally, the best value of the CR adsorption capacity by NPS powder is 2665.3 mg/g at 100 mg/L as the initial CR concentration, with an adsorption time of 30 min, without no impact from temperature and pH. So, 5 min is the enough time for the elimination of 82.12% of the 30 mg/L initial concentration of CR. This study expresses the new discovery of a cheap and safe material, in addition to being environmentally friendly, without resorting to any chemical additives or heat treatments.
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Affiliation(s)
- Marwa Nabil
- Department of Electronic Materials Researches, Advanced Technology and New Materials Research Institute, City for Scientific, Research and Technology Applications, New Borg El-Arab City 21934, Egypt
- Correspondence:
| | - Kamal Reyad Mahmoud
- Department of Physics, Faculty of Science, Kafrelsheikh University, Kafr El Sheikh 33516, Egypt;
| | - Raghda Nomier
- Department of Physics, Faculty of Science, Damanhour University, Damanhur 22511, Egypt; (R.N.); (E.-M.E.-M.); (H.M.)
| | - El-Maghraby El-Maghraby
- Department of Physics, Faculty of Science, Damanhour University, Damanhur 22511, Egypt; (R.N.); (E.-M.E.-M.); (H.M.)
| | - Hussien Motaweh
- Department of Physics, Faculty of Science, Damanhour University, Damanhur 22511, Egypt; (R.N.); (E.-M.E.-M.); (H.M.)
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6
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Wang L, Jalali Dil E, Ajji A. Effect of Uniaxial Stretching on Molecular Orientation, Crystallinity and Oxygen Permeability of Ethylene Vinyl Alcohol. INT POLYM PROC 2021. [DOI: 10.1515/ipp-2020-4062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
This work studies the effects of uniaxial stretching on molecular orientation, crystallinity, crystallography and oxygen permeability of high barrier multilayer films based on EVOH barrier layer. Film samples were prepared using two different blow-up ratios (BUR) of 1 and 3. Uniaxial stretching was applied at 100°C using a tensile machine equipped with an environmental chamber. Fourier transform infrared (FTIR) spectroscopy was used to examine the molecular orientation in the EVOH layer before and after stretching and confirmed a considerable increase in the molecular orientation in the EVOH layer. Dynamic scanning calorimetry (DSC) and wide-angle X-ray diffraction (XRD) results point to the perfection of EVOH crystal structure by applying uniaxial stretching at high temperatures. Oxygen permeability results showed a considerable 25% decrease after stretching of the sample with lower BUR while a significant 80% reduction in oxygen permeability was observed for the sample prepared at higher BUR. The mechanism involved in increasing oxygen permeability due to the uniaxial stretching at high temperature is discussed in detail.
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Affiliation(s)
- L. Wang
- CREPEC, Chemical Engineering Department, Polytechnique Montreal , Quebec , Canada
| | - E. Jalali Dil
- CREPEC, Chemical Engineering Department, Polytechnique Montreal , Quebec , Canada
| | - A. Ajji
- CREPEC, Chemical Engineering Department, Polytechnique Montreal , Quebec , Canada
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7
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Cozzolino A, Rizzo P, Gallo C, Bianchi R, Daniel C, Guerra G. Axially oriented guest induced crystallization in syndiotactic polystyrene unstretched fibers. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123908] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Mondschein RJ, Hostetler J, Arrington CB, Long TE. Hydroxyethylresorcinol- and hydroxyethylhydroquinone-containing poly(ethylene terephthalate) copolymers. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Zargarnezhad H, Asselin E, Wong D, Lam CNC. A Critical Review of the Time-Dependent Performance of Polymeric Pipeline Coatings: Focus on Hydration of Epoxy-Based Coatings. Polymers (Basel) 2021; 13:1517. [PMID: 34065062 PMCID: PMC8125940 DOI: 10.3390/polym13091517] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/27/2021] [Accepted: 04/29/2021] [Indexed: 11/16/2022] Open
Abstract
The barrier performance of organic coatings is a direct function of mass transport and long-term stability of the polymeric structure. A predictive assessment of the protective coating cannot be conducted a priori of degradation effects on transport. Epoxy-based powder coatings are an attractive class of coatings for pipelines and other structures because application processing times are low and residual stresses between polymer layers are reduced. However, water ingress into the polymeric network of these coatings is of particular interest due to associated competitive sorption and plasticization effects. This review examines common analytical techniques for identifying parameters involved in transport in wet environments and underscores the gaps in the literature for the evaluation of the long-term performance of such coating systems. Studies have shown that the extent of polymer hydration has a major impact on gas and ion permeability/selectivity. Thus, transport analyses based only on micropore filling (i.e., adsorption) by water molecules are inadequate. Combinatorial entropy of the glassy epoxy and water vapor mixture not only affects the mechanism of membrane plasticization, but also changes the sorption kinetics of gas permeation and causes a partial gas immobility in the system. However, diffusivity, defined as the product of a kinetic mobility parameter and a concentration-dependent thermodynamic parameter, can eventually become favorable for gas transport at elevated temperatures, meaning that increasing gas pressure can decrease selectivity of the membrane for gas permeation. On the other hand, reverse osmosis membranes have shown that salt permeation is sensitive to, among other variables, water content in the polymer and a fundamental attribute in ionic diffusion is the effective size of hydrated ions. In addition, external electron sources-e.g., cathodic protection potentials for pipeline structures-can alter the kinetics of this transport as the tendency of ions to dissociate increases due to electrostatic forces. Focusing primarily on epoxy-based powder coatings, this review demonstrates that service parameters such as humidity, temperature, and concentration of aggressive species can dynamically develop different transport mechanisms, each at the expense of others. Although multilayered coating systems decrease moisture ingress and the consequences of environmental exposure, this survey shows that demands for extreme operating conditions can pose new challenges for coating materials and sparse data on transport properties would limit analysis of the remaining life of the system. This knowledge gap impedes the prediction of the likelihood of coating and, consequently, infrastructure failures.
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Affiliation(s)
- Hossein Zargarnezhad
- Department of Materials Engineering, The University of British Columbia, 309-6350 Stores Road, Vancouver, BC V6T 1Z4, Canada;
| | - Edouard Asselin
- Department of Materials Engineering, The University of British Columbia, 309-6350 Stores Road, Vancouver, BC V6T 1Z4, Canada;
| | - Dennis Wong
- Shawcor Ltd., 25 Bethridge Road, Toronto, ON M9W 1M7, Canada; (D.W.); (C.N.C.L.)
| | - C. N. Catherine Lam
- Shawcor Ltd., 25 Bethridge Road, Toronto, ON M9W 1M7, Canada; (D.W.); (C.N.C.L.)
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10
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Chiu H, Yu C, Huang C, Lin B. Coextrusion and biaxial orientation of multi‐microlayer films. J Appl Polym Sci 2020. [DOI: 10.1002/app.49245] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Hsien‐Tang Chiu
- Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan
| | - Chin‐Yang Yu
- Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan
| | - Chang‐Min Huang
- Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan
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11
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Eren B, Eren E, Guney M, Jean Y, Van Horn JD. Positron annihilation lifetime spectroscopy study of polyvinylpyrrolidone‐added polyvinylidene fluoride membranes: Investigation of free volume and permeation relationships. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20190031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Bilge Eren
- Faculty of Science and Arts, Department of ChemistryBilecik Seyh Edebali University 11210 Bilecik Turkey
| | - Erdal Eren
- Faculty of Science and Arts, Department of ChemistryBilecik Seyh Edebali University 11210 Bilecik Turkey
| | - Murat Guney
- Faculty of Science and Arts, Department of ChemistryBilecik Seyh Edebali University 11210 Bilecik Turkey
| | - Yan‐Ching Jean
- Department of ChemistryUniversity of Missouri‐Kansas City Kansas City Missouri 64110
| | - J. David Van Horn
- Department of ChemistryUniversity of Missouri‐Kansas City Kansas City Missouri 64110
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12
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Sun L, Wang J, Mahmud S, Jiang Y, Zhu J, Liu X. New insight into the mechanism for the excellent gas properties of poly(ethylene 2,5-furandicarboxylate) (PEF): Role of furan ring’s polarity. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.06.033] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Wang R, Ren D, Sun X, Liang W, Wang K. Structure variation and puncture resistance of stretched crosslinked polyethylene film: Effects of stretching temperature. J Appl Polym Sci 2019. [DOI: 10.1002/app.47542] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rong Wang
- National Institute of Clean-and-Low-Carbon-Energy; Beijing, 102211 China
| | - Dongxue Ren
- National Institute of Clean-and-Low-Carbon-Energy; Beijing, 102211 China
| | - Xiaojie Sun
- National Institute of Clean-and-Low-Carbon-Energy; Beijing, 102211 China
| | - Wenbin Liang
- National Institute of Clean-and-Low-Carbon-Energy; Beijing, 102211 China
| | - Ke Wang
- National Institute of Clean-and-Low-Carbon-Energy; Beijing, 102211 China
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14
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Mahmoud KR, El-Shehawy A, Atta H. Positron annihilation spectroscopy of chain-end-functionalized polystyrenes with definite numbers of benzyl alcohol and perfluorooctyl groups. POLIMEROS 2019. [DOI: 10.1590/0104-1428.04619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Zekriardehani S, Joshi AS, Jabarin SA, Coleman MR. Combined effect of small molecule antiplasticizers and strain induced crystallization on properties of polyethylene terephthalate. POLYMER CRYSTALLIZATION 2018. [DOI: 10.1002/pcr2.10016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Anup S. Joshi
- Department of Chemical EngineeringUniversity of Toledo Toledo Ohio
| | - Saleh A. Jabarin
- Department of Chemical EngineeringUniversity of Toledo Toledo Ohio
| | - Maria R. Coleman
- Department of Chemical EngineeringUniversity of Toledo Toledo Ohio
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16
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Almalki AS, Alhadhrami A, Adam AMA, Grabchev I, Almeataq M, Al-Humaidi JY, Sharshar T, Refat MS. Preparation of elastic polymer slices have the semiconductors properties for use in solar cells as a source of new and renewable energy. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.05.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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17
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Al-Saif FA, Alibrahim KA, Sharshar T, Refat MS. Physicochemical and Spectroscopic Study of Co(II), Ni(II), Cr(III), and Fe(III) Cholyltaurine Adducts. RUSS J GEN CHEM+ 2018. [DOI: 10.1134/s1070363217120362] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Zekriardehani S, Joshi AS, Jabarin SA, Gidley DW, Coleman MR. Effect of Dimethyl Terephthalate and Dimethyl Isophthalate on the Free Volume and Barrier Properties of Poly(ethylene terephthalate) (PET): Amorphous PET. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02230] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- S. Zekriardehani
- Department
of Chemical Engineering, University of Toledo, Toledo, Ohio 43606, United States
| | - A. S. Joshi
- Department
of Chemical Engineering, University of Toledo, Toledo, Ohio 43606, United States
| | - S. A. Jabarin
- Department
of Chemical Engineering, University of Toledo, Toledo, Ohio 43606, United States
| | - D. W. Gidley
- Department
of Physics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - M. R. Coleman
- Department
of Chemical Engineering, University of Toledo, Toledo, Ohio 43606, United States
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19
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Poly(ethylene furanoate- co -ethylene terephthalate) biobased copolymers: Synthesis, thermal properties and cocrystallization behavior. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.02.037] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Zekriardehani S, Jabarin SA, Gidley DR, Coleman MR. Effect of Chain Dynamics, Crystallinity, and Free Volume on the Barrier Properties of Poly(ethylene terephthalate) Biaxially Oriented Films. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00198] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S. Zekriardehani
- Department
of Chemical Engineering, University of Toledo, Toledo, Ohio 43606, United States
| | - S. A. Jabarin
- Department
of Chemical Engineering, University of Toledo, Toledo, Ohio 43606, United States
| | - D. R. Gidley
- Department
of Physics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - M. R. Coleman
- Department
of Chemical Engineering, University of Toledo, Toledo, Ohio 43606, United States
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21
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Wu Y, Wong YS, Fuh JYH. Degradation behaviors of geometric cues and mechanical properties in a 3D scaffold for tendon repair. J Biomed Mater Res A 2017; 105:1138-1149. [DOI: 10.1002/jbm.a.35966] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 11/04/2016] [Accepted: 11/23/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Yang Wu
- Department of Mechanical Engineering; National University of Singapore; Singapore 117576 Singapore
| | - Yoke San Wong
- Department of Mechanical Engineering; National University of Singapore; Singapore 117576 Singapore
| | - Jerry Ying Hsi Fuh
- Department of Mechanical Engineering; National University of Singapore; Singapore 117576 Singapore
- National University of Singapore (Suzhou) Research Institute; Suzhou Industrial Park Suzhou 215123 People's Republic of China
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22
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Modelling approaches for designing and evaluating the performance of modified atmosphere packaging (MAP) systems for fresh produce: A review. Food Packag Shelf Life 2016. [DOI: 10.1016/j.fpsl.2016.08.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Refat MS, Sharshar T, Elsabawy KM, El-Sayed MY, Adam AMA. Synthesis, physicochemical characterization and anticancer screening of sulfa drug ruthenium complexes as anticancer agent. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.07.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Synthesis of amino acid iodine charge transfer complexes in situ methanolic medium: Chemical and physical investigations. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.07.138] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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25
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Influence of nanoparticle inclusion on the cavity size distribution and accessible volume in polystyrene – Silica nanocomposites. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.08.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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26
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Shinotsuka K, Assender H. In situAFM study of near-surface crystallization in PET and PEN. J Appl Polym Sci 2016. [DOI: 10.1002/app.44269] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kei Shinotsuka
- Department of Materials; University of Oxford; Parks Road Oxford OX1 3PH United Kingdom
| | - Hazel Assender
- Department of Materials; University of Oxford; Parks Road Oxford OX1 3PH United Kingdom
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27
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Positron annihilation spectroscopy and mechanical properties studies for epoxy matrices reinforced with different nanoparticles. JOURNAL OF POLYMER RESEARCH 2016. [DOI: 10.1007/s10965-016-1074-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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28
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Murray BR, Leen SB, Semprimoschnig COA, Brádaigh CMÓ. Helium permeability of polymer materials as liners for composite overwrapped pressure vessels. J Appl Polym Sci 2016. [DOI: 10.1002/app.43675] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Brendan R. Murray
- Mechanical Engineering; National University of Ireland Galway; Ireland
- MaREI Centre, Environmental Research Institute, University College Cork; Ireland
| | - Sean B. Leen
- Mechanical Engineering; National University of Ireland Galway; Ireland
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29
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Hassan HE, Refat MS, Sharshar T. Optical and positron annihilation spectroscopic studies on PMMA polymer doped by rhodamine B/chloranilic acid charge transfer complex: Special relevance to the effect of γ-ray irradiation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 159:238-248. [PMID: 26867205 DOI: 10.1016/j.saa.2016.01.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 01/20/2016] [Accepted: 01/23/2016] [Indexed: 06/05/2023]
Abstract
Polymeric sheets of poly (methylmethaclyerate) (PMMA) containing charge transfer (CT) complex of rhodamine B/chloranilic acid (Rho B/CHA) were synthesized in methanol solvent at room temperature. The systematic analysis done on the Rho B and its CT complex in the form of powder or polymeric sheets confirmed their structure and thermal stability. The IR spectra interpreted the charge transfer mode of interaction between the CHA central positions and the terminal carboxylic group. The polymer sheets were irradiated with 70 kGy of γ radiation using (60)Co source to study the enhanced changes in the structure and optical parameters. The microstructure changes of the PMMA sheets caused by γ-ray irradiation were analyzed using positron annihilation lifetime (PAL) and positron annihilation Doppler broadening (PADB) techniques. The positron life time components (τ(i)) and their corresponding intensities (I(i)) as well as PADB line-shape parameters (S and W) were found to be highly sensitive to the enhanced disorder occurred in the organic chains of the polymeric sheets due to γ-irradiation.
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Affiliation(s)
- H E Hassan
- Cyclotron Facility, Nuclear Research Center, Atomic Energy Authority, Cairo 13759, Egypt.
| | - Moamen S Refat
- Chemistry Department, Faculty of Science, Taif University, P.O. Box 888, Al-Hawiah, Taif 21974, Saudi Arabia; Chemistry Department, Faculty of Science, Port Said University, Port Said, Egypt
| | - T Sharshar
- Physics Department, Faculty of Science, Kafrelsheikh University, Kafr El-Sheikh, Egypt; Physics Department, Faculty of Science, Taif University, P.O. Box 888, Al-Hawiah, Taif 21974, Saudi Arabia
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30
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Ismail A, Mahmoud K, Abd-El Salam M. Electrical conductivity and positron annihilation characteristics of ternary silicone rubber/carbon black/TiB2 nanocomposites. POLYMER TESTING 2015; 48:37-43. [DOI: 10.1016/j.polymertesting.2015.09.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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31
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Mahmoud KR, Khodair AI, Shaban SY. Positron annihilation lifetime studies of changes in free volume on some biorelevant nitrogen heterocyclic compounds and their S-glycosylation. Appl Radiat Isot 2015; 105:303-307. [PMID: 26272166 DOI: 10.1016/j.apradiso.2015.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 06/27/2015] [Accepted: 07/01/2015] [Indexed: 11/30/2022]
Abstract
A series of N-heterocyclic compounds was investigated by positron annihilation lifetime spectroscopy as well as Doppler broadening of annihilation radiation (DBAR) at room temperature. The results showed that the formation probability and life time of ortho-positronium in this series are structure and electron-donation character dependent, and can give more information about the structure. The DBAR provides direct information about the change of core and valance electrons as well as the number of defect types present in these compounds.
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Affiliation(s)
- K R Mahmoud
- Physics Department, Faculty of Science, Kafrelsheikh University, 33516 El Gaish Street, Kafr El Sheikh, Egypt.
| | - A I Khodair
- Chemistry Department, Faculty of Science, Kafrelsheikh University, 33516 El Gaish Street, Kafr El Sheikh, Egypt
| | - S Y Shaban
- Chemistry Department, Faculty of Science, Kafrelsheikh University, 33516 El Gaish Street, Kafr El Sheikh, Egypt
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32
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Adam AMA, Sharshar T, Mohamed MA, Ibrahim OB, Refat MS. Study of chemical bonding, physical and biological effect of metformin drug as an organized medicine for diabetes patients with chromium(III) and vanadium(IV) ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 149:323-332. [PMID: 25965516 DOI: 10.1016/j.saa.2015.04.115] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 03/19/2015] [Accepted: 04/30/2015] [Indexed: 06/04/2023]
Abstract
New vanadium(IV) and chromium(III) complexes of metformin (MFN) were synthesized upon the chemical interaction between vanadyl(II) sulfate monohydrate or chromium(III) chloride hexahydrate with metformin diabetic drug in the media of a pure grade of methanol solvent. The [(VO)2(MFN)2(SO4)2]2H2O and [Cr(MFN)3]·Cl3·6H2O complexes were discussed using microanalytical measurements, molar conductance, spectroscopic (infrared, ESR, XRD, and UV-vis), effective magnetic moment, scanning electron microscopy (SEM), and thermal analyses (TG/DTG). The elemental analysis shows that VO(II) and Cr(III) complexes were associated with 1:1 and 1:3M ratios, respectively. The infrared spectroscopic results data received from the comparison between free MFN free ligand and their vanadyl(II) and chromium(III) complexes were proven that metformin reacted with respected metal ions as a bidentate ligand through its two imino groups. The kinetic thermodynamic parameters were estimated from the DTG curves. The microstructure changes of the VO(II) and Cr(III) complexes have been probed using positron annihilation lifetime (PAL) and positron annihilation Doppler broadening (PADB) techniques. The PAL and PADB line-shape parameters were found to be dependent on the structure, electronic configuration and molecular weight of metal complexes. Antimicrobial activity of the metformin free ligand and its vanadyl(II) and chromium(III) complexes were evaluated against the gram negative and gram positive bacteria strains and different fungal strains. Moderate antimicrobial activity recorded by disk diffusion inhibition growth zone method in vanadyl(II) and chromium(III) complexes compared to metformin free ligand.
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Affiliation(s)
- Abdel Majid A Adam
- Chemistry Department, Faculty of Science, Taif University, Al-Haweiah, P.O. Box 888, 21974 Taif, Saudi Arabia.
| | - T Sharshar
- Physics Department, Faculty of Science, Taif University, P.O. Box 888, Al-Hawiah, Taif 21974, Saudi Arabia; Physics Department, Faculty of Science, Kafrelsheikh University, Kafr El-Sheikh, Egypt
| | - Mahmoud A Mohamed
- Chemistry Department, Faculty of Science, Taif University, Al-Haweiah, P.O. Box 888, 21974 Taif, Saudi Arabia; Department of Biochemistry, Faculty of Agriculture, Cairo University, Giza, Egypt
| | - Omar B Ibrahim
- Chemistry Department, Faculty of Science, Taif University, Al-Haweiah, P.O. Box 888, 21974 Taif, Saudi Arabia
| | - Moamen S Refat
- Chemistry Department, Faculty of Science, Taif University, Al-Haweiah, P.O. Box 888, 21974 Taif, Saudi Arabia; Department of Chemistry, Faculty of Science, Port Said, Port Said University, Egypt
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33
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Belaissaoui B, Le Moullec Y, Hagi H, Favre E. Energy efficiency of oxygen enriched air production technologies: Cryogeny vs membranes. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2014.01.043] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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34
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Belaissaoui B, Le Moullec Y, Hagi H, Favre E. Energy Efficiency of Oxygen Enriched Air Production Technologies: Cryogeny vs Membranes. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.egypro.2014.11.054] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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35
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Meng L, Li J, Cui K, Chen X, Lin Y, Xu J, Li L. A simple constrained uniaxial tensile apparatus for in situ investigation of film stretching processing. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:115104. [PMID: 24289434 DOI: 10.1063/1.4828665] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A simple constrained uniaxial tensile apparatus was designed and constructed to obtain stress-strain curve during stretching and subsequent structural evolution of polymeric films. Stretch is carried out through two motor driven clamps in the machine direction and scissor-like clamps in the transverse direction keeping the sample width constant. The force information during film stretching process is recorded by a tension sensor and structural evolution can be obtained by in situ X-ray scattering technique. All parameters related to film stretching manufacturing, such as temperature, draw ratio, and stretching speed can be set independently, making the apparatus an effective method to explore the relationship between processing parameters and structure.
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Affiliation(s)
- Lingpu Meng
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, China
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36
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Turnbull L, Liggat J, MacDonald W. Thermal degradation chemistry of poly(ethylene naphthalate) – A study by thermal volatilisation analysis. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2013.08.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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37
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Wang ZY, Lim J, Ho YS, Zhang QY, Chong MSK, Tang M, Hong MH, Chan JKY, Teoh SH, Thian ES. Biomimetic three-dimensional anisotropic geometries by uniaxial stretching of poly(ε-caprolactone) films: degradation and mesenchymal stem cell responses. J Biomed Mater Res A 2013; 102:2197-207. [PMID: 23907895 DOI: 10.1002/jbm.a.34899] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 07/18/2013] [Accepted: 07/24/2013] [Indexed: 02/04/2023]
Abstract
Geometric cues have been used for a variety of cell regulation and tissue regenerative applications. While the function of geometric cues is being recognized, their stability and degradation behaviors are not well known. Here, we studied the influence of degradation on uniaxial-stretch-induced poly(ε-caprolactone) (UX-PCL) ridge/groove arrays and further cellular responses. Results from accelerated hydrolysis in vitro showed that UX-PCL ridge/groove arrays followed a surface-controlled erosion, with an overall geometry remained even at ∼45% film weight loss. Compared to unstretched PCL flat surfaces and/or ridge/groove arrays, UX-PCL ridge/groove arrays achieved an enhanced morphological stability against degradation. Over the degradation period, UX-PCL ridge/groove arrays exhibited an "S-shape" behavior of film weight loss, and retained more stable surface hydrophilicity and higher film mechanical properties than those of unstretched PCL surfaces. Human mesenchymal stem cells (MSCs) aligned better toward UX-PCL ridge/groove arrays when the geometries were remained intact, and became sensitive with gradually declined nucleus alignment and elongation to the geometric degradation of ridges. We speculate that uniaxial stretching confers UX-PCL ridge/groove arrays with enhanced stability against degradation in erosive environment. This study provides insights of how degradation influences geometric cues and further cell responses, and has implications for the design of biomaterials with stability-enhanced geometric cues for long-term tissue regeneration.
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Affiliation(s)
- Zu-Yong Wang
- Department of Mechanical Engineering, National University of Singapore, Singapore
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38
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Shen Y, Lua AC. Theoretical and experimental studies on the gas transport properties of mixed matrix membranes based on polyvinylidene fluoride. AIChE J 2013. [DOI: 10.1002/aic.14186] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yi Shen
- School of Mechanical and Aerospace Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Republic of Singapore
| | - Aik Chong Lua
- School of Mechanical and Aerospace Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Republic of Singapore
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39
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Tabatabaei SH, Ajji A, Ghasemi H. Effect of Random and Block Copolypropylenes on Structure and Properties of Uniaxially and Biaxially Oriented PP Films. INT POLYM PROC 2013. [DOI: 10.3139/217.2404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Cast films of two linear polypropylenes (PP) having different molecular weights and their blends with 5, 20, and 40 wt.% random and block copolymers were prepared. The produced cast films were uniaxially and biaxially hot drawn at T = 155°C using a biaxial stretcher and the changes in structure and morphology were examined and related to barrier, mechanical, haze, and tear properties. The crystallinity and crystal size distribution of the films were studied using differential scanning calorimetry (DSC). The uniaxial drawing generated a highly oriented fibrillar structure, resulting in an increase in the melting point of the films. A significant effect of the random copolymer on the size of crystallites was found using DSC, which was also confirmed from polarized optical microscopy (POM). Compared to the neat homopolymers, finer and numerous spherulites were observed for the blends. During drawing, the applied loads in the machine and transverse directions (MD and TD, respectively) were recorded and related to breaking up and tilting of the crystal lamellae. Adding the random copolymer appreciably decreased the haze of the films and hence drastically improved the clarity. Tensile properties and tear resistance of the cast films in MD and TD were evaluated. The addition of the random copolymer slightly reduced the Young modulus and tensile strength, but increased the elongation at break. A slight increase in the oxygen transmission rate (OTR) of the biaxially drawn films were observed by adding the copolymer.
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Affiliation(s)
- S. H. Tabatabaei
- CREPEC, Chemical Engineering Department, Ecole Polytechnique, Montreal, QC, Canada
| | - A. Ajji
- CREPEC, Chemical Engineering Department, Ecole Polytechnique, Montreal, QC, Canada
| | - H. Ghasemi
- CREPEC, Chemical Engineering Department, Ecole Polytechnique, Montreal, QC, Canada
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40
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Liao LQ, Fu YZ, Liang XY, Mei LY, Liu YQ. Diffusion of CO2Molecules in Polyethylene Terephthalate/Polylactide Blends Estimated by Molecular Dynamics Simulations. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.3.753] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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41
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Positron annihilation studies of bio-related N2S2-tetradentate ligands and their zinc complexes. Radiat Phys Chem Oxf Engl 1993 2013. [DOI: 10.1016/j.radphyschem.2012.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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42
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Fu Y, Liao L, Yang L, Lan Y, Mei L, Liu Y, Hu S. Molecular dynamics and dissipative particle dynamics simulations for prediction of miscibility in polyethylene terephthalate/polylactide blends. MOLECULAR SIMULATION 2012. [DOI: 10.1080/08927022.2012.738294] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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43
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Ramya P, Ranganathaiah C, Williams J. Experimental determination of interface widths in binary polymer blends from free volume measurements. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.07.063] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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44
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Meghala D, Ranganathaiah C. Characterization of interfaces in Poly (styrene-co-acrylonitrile) (SAN) based ternary polymer blends: A new approach from positron lifetime spectroscopy. POLYMER 2012. [DOI: 10.1016/j.polymer.2011.12.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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45
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Carrieri G, De Bonis MV, Ruocco G. Modeling and experimental validation of mass transfer from carbonated beverages in polyethylene terephthalate bottles. J FOOD ENG 2012. [DOI: 10.1016/j.jfoodeng.2011.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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46
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de Jong E, Dam MA, Sipos L, Gruter GJM. Furandicarboxylic Acid (FDCA), A Versatile Building Block for a Very Interesting Class of Polyesters. ACS SYMPOSIUM SERIES 2012. [DOI: 10.1021/bk-2012-1105.ch001] [Citation(s) in RCA: 171] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- E. de Jong
- Avantium Chemicals BV, Zekeringstraat 29, 1014 BV Amsterdam, The Netherlands
| | - M. A. Dam
- Avantium Chemicals BV, Zekeringstraat 29, 1014 BV Amsterdam, The Netherlands
| | - L. Sipos
- Avantium Chemicals BV, Zekeringstraat 29, 1014 BV Amsterdam, The Netherlands
| | - G.-J. M. Gruter
- Avantium Chemicals BV, Zekeringstraat 29, 1014 BV Amsterdam, The Netherlands
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47
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Turnbull L, Liggat JJ, MacDonald WA. Ageing of poly(ethylene terephthalate) and poly(ethylene naphthalate) under moderately accelerated conditions. J Appl Polym Sci 2011. [DOI: 10.1002/app.35476] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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48
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Li D, Liu T, Zhao L, Yuan W. Controlling sandwich-structure of PET microcellular foams using coupling of CO2 diffusion and induced crystallization. AIChE J 2011. [DOI: 10.1002/aic.12764] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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49
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Courgneau C, Domenek S, Lebossé R, Guinault A, Avérous L, Ducruet V. Effect of crystallization on barrier properties of formulated polylactide. POLYM INT 2011. [DOI: 10.1002/pi.3167] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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50
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Papageorgiou GZ, Achilias DS, Karayannidis GP. Estimation of thermal transitions in poly(ethylene naphthalate): Experiments and modeling using isoconversional methods. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.04.031] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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