1
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Absolute molar mass determination in mixed solvents. 2. SEC/MALS/DRI in a mix of two “nearly-isovirial” solvents. Anal Chim Acta 2022; 1231:340369. [DOI: 10.1016/j.aca.2022.340369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 09/01/2022] [Accepted: 09/06/2022] [Indexed: 11/22/2022]
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2
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Yamauchi Y, Samitsu S, Goto K, Takeuchi M. Bottlebrush polymer-reinforced transparent multiphase plastics with enhanced thermal stability. Chem Commun (Camb) 2020; 56:14641-14644. [DOI: 10.1039/d0cc06769e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bottlebrush polymers (BPs) are highly tunable with regard to their glass transition temperature, refractive index, and shape.
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Affiliation(s)
- Yoshihiro Yamauchi
- National Institute for Materials Science (NIMS), 1-2-1 Sengen
- Tsukuba
- Japan
| | - Sadaki Samitsu
- National Institute for Materials Science (NIMS), 1-2-1 Sengen
- Tsukuba
- Japan
| | - Kenta Goto
- National Institute for Materials Science (NIMS), 1-2-1 Sengen
- Tsukuba
- Japan
| | - Masayuki Takeuchi
- National Institute for Materials Science (NIMS), 1-2-1 Sengen
- Tsukuba
- Japan
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3
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Study of autocorrelation function of polymer and polymer–nanocomposite solutions using dynamic light scattering method. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-017-1368-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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4
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Liu W, Wu C. Rheological Study of Soft Matters: A Review of Microrheology and Microrheometers. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700307] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Wei Liu
- Department of Physics; The Chinese University of Hong Kong; Shatin N.T. Hong Kong 999077
| | - Chi Wu
- Department of Chemistry; The Chinese University of Hong Kong; Shatin N.T. Hong Kong 999077
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5
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Rehman N, Bica CID, de Miranda MIG, Rosa SML. Dynamics of cellulose nanocrystals in the presence of hexadecyltrimethylammonium bromide. Macromol Res 2017. [DOI: 10.1007/s13233-017-5089-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Photon correlation dynamics of unentangled star-shaped poly(ε-caprolactone)s with extremely small branches and its interaction with plasticization in miscible blend system. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.09.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Sun J, Černoch P, Völkel A, Wei Y, Ruokolainen J, Schlaad H. Aqueous Self-Assembly of a Protein-Mimetic Ampholytic Block Copolypeptide. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00817] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jing Sun
- School
of Polymer Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao 266042, China
- Department
of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Potsdam, Germany
| | - Peter Černoch
- Institute of Macromolecular
Chemistry, Heyrovského nám.
2, 162 06 Praha
6, Czech Republic
- Department
of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Potsdam, Germany
| | - Antje Völkel
- Department
of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Potsdam, Germany
| | - Yuhan Wei
- School
of Polymer Science and Engineering, Qingdao University of Science and Technology, 53 Zhengzhou Road, Qingdao 266042, China
| | - Janne Ruokolainen
- Department
of Applied Physics, Aalto University Nanomicroscopy Center (Aalto-NMC), Puumiehenkuja
2, 02150 Espoo, Finland
| | - Helmut Schlaad
- Department
of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Research Campus Golm, 14424 Potsdam, Germany
- Institute
of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
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8
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Filippov SK, Seery TAP, Kříž J, Hruby M, Černoch P, Sedláček O, Kadlec P, Pánek J, Štěpánek P. Collective polyelectrolyte diffusion as a function of counterion size and dielectric constant. POLYM INT 2012. [DOI: 10.1002/pi.4410] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Sergey K Filippov
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic
| | - Thomas AP Seery
- Department of Chemistry; University of Connecticut; Storrs CT 06269 USA
- Polymer Program, Institute of Materials Science; University of Connecticut; Storrs CT 06269 USA
| | - Jaroslav Kříž
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic
| | - Martin Hruby
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic
| | - Peter Černoch
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic
| | - Ondřej Sedláček
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic
| | - Petr Kadlec
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic
| | - Jiří Pánek
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic
| | - Petr Štěpánek
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic
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9
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Zhu X, Shen J, Thomas JC. Analysis of noisy dynamic light scattering data using constrained regularization techniques. APPLIED OPTICS 2012; 51:7537-7548. [PMID: 23128700 DOI: 10.1364/ao.51.007537] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Accepted: 09/10/2012] [Indexed: 06/01/2023]
Abstract
Dynamic light scattering (DLS) from colloidal particles often contains noise, which makes inversion of the correlation function to obtain the particle size distribution (PSD) unreliable. In this work, poor-quality correlation function data with baseline error were analyzed using constrained regularization techniques. The effect of baseline error was investigated, and two strategies were proposed to compensate for baseline error. One strategy is based on edge proportion detection of spurious peaks at large size in the PSD, and the other is based on the solution norm. Results from simulated and experimental data demonstrate the effectiveness of our proposed strategies. The L-curve rules for standard Tikhonov and for constrained regularization, the generalized cross-validation (GCV) rule, and the robust GCV rule were investigated for determination of the regularization parameter. A comparison of these rules was done using both simulated and experimental data. It is shown that correction of baseline error with baseline compensation as well as a reasonable regularization parameter choice improves the accuracy of PSD recovery in poor-quality DLS data analysis.
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Affiliation(s)
- Xinjun Zhu
- School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo, China
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10
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Filippov SK, Seery TA, Černoch P, Pánek J, Štěpánek P. Behavior of polyelectrolyte solutions in a wide range of solvent dielectric constant. Eur Polym J 2011. [DOI: 10.1016/j.eurpolymj.2011.05.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Giacomelli FC, Riegel IC, Stepánek P, Petzhold CL, Ninago MD, Satti AJ, Ciolino AE, Villar MA, Schmidt V, Giacomelli C. Structure of micelles formed by highly asymmetric polystyrene-b-polydimethylsiloxane and polystyrene-b-poly[5-(N,N-diethylamino)isoprene] diblock copolymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:14494-14501. [PMID: 20722372 DOI: 10.1021/la1024372] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The internal structure of polystyrene(PS)-shell micelles having core-forming blocks consisting of polydimethylsiloxane (PDMS) or poly[5-(N,N-diethylamino)isoprene] (PAI) was determined in detail by accessing the multilevel structural organization using static and dynamic light scattering and small-angle X-ray scattering techniques. Well-defined PS-b-PDMS and PS-b-PAI diblock copolymers with molar masses in the range of 12.0k-18.2k g/mol were dispersed in cyclohexane, dimethylacetamide, or dimethylformamide. Colloidal nanoparticles exhibiting either swollen core with a large surface area per corona chain that enables the PS chains to assume a random coil conformation with gaussian statistics, or compact core and slightly stretched PS chains in the corona were obtained. Therefore, the results of this study provide an interesting alternative allowing for precise control of the core and corona properties of PS-b-PDMS and PS-b-PAI micelles in selective solvents. Admittedly, such differences in terms of micellar properties can dictate the potential of block copolymer micelles for generating thin films from preformed nano-objects, as well as the capability to function as nanoreactors in organic medium.
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Affiliation(s)
- Fernando C Giacomelli
- Centro de Ciências Naturais, Universidade Federal do ABC, 09210-170 Santo André, Brazil
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12
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Sonnenschein MF, Redwine OD, Wendt BL, Kastl PE. Colloidal encapsulation of hydrolytically and oxidatively unstable organoborane catalysts and their use in waterborne acrylic polymerization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:12488-12494. [PMID: 19791777 DOI: 10.1021/la9017079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Trialkylborane catalysts and their amine complexes are hydrolytically and oxidatively unstable, decomposing in water very rapidly to trialkylboroxin, borate esters, and boric acid. However, trialkylborane-amine complexes will rapidly partition to a colloidal phase and remain surprisingly stable for long periods of time (>3 months) until such time as the catalyst is brought into an environment convenient for phase transfer. We show that tributylborane-amine complexes can be stored in aqueous solutions of several water-miscible polymers. We show by diffusion-oriented spectroscopy (DOSY) NMR experiments that the tributylborane-amine catalyst diffuses at nearly the same rate as the colloidal phase, providing strong evidence that they coexist. The aqueous colloidal catalysts can then be mixed with polymerizable monomers such as acrylates to produce good-quality polymers. We show that these colloid-encapsulated catalysts are also useful in producing adhesives capable of adhering low-surface-energy plastic substrates, even when formulated in systems containing 45% water. This is the first report of a waterborne structural adhesive.
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Affiliation(s)
- Mark F Sonnenschein
- The Dow Chemical Company, Corporate Research and Development, Midland, Michigan 48674, USA.
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13
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Piñeiro Y, López-Quintela MA, Rivas J, Leisner D. Percolation threshold and scattering power law of gelatin gels. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 79:041409. [PMID: 19518235 DOI: 10.1103/physreve.79.041409] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2008] [Revised: 01/22/2009] [Indexed: 05/27/2023]
Abstract
Gelation of gelatin was broadly studied by experimental and theoretical methods. Power laws observed on the gel point-mainly obtained by dynamic light scattering (DLS)-are considered to be the signature of some special dynamic phenomena ascribed to the appearance of a percolation cluster. We present here experimental (DLS and rheometric measurements) and Monte Carlo simulation studies showing that the percolation threshold and DLS power-law decay occur on different times. We ascribe the percolation point to the time where the scattering medium mode diverges. This mode is sensitive to the clusters' growth and diverges when the system attains the percolation threshold. The power-law behavior is obtained only in the postpercolation regime.
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Affiliation(s)
- Y Piñeiro
- Department of Applied Physics, University of Santiago de Compostela, Campus Sur, E-15782 Santiago de Compostela, Spain
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14
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Giacomelli FC, Riegel IC, Petzhold CL, da Silveira NP, Stepanek P. Aggregation behavior of a new series of ABA triblock copolymers bearing short outer A blocks in B-selective solvent: from free chains to bridged micelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:731-738. [PMID: 19177644 DOI: 10.1021/la8026732] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A combination of dynamic (DLS) and static (SLS) light scattering measurements was employed to study the self-assembly behavior of a new series of triblock copolymers bearing poly[5-(N,N-diethylamino isoprene)] (PAI) short outer blocks and polystyrene (PS) as the major middle block. Previously, it was verified that PAI outer blocks can be quaternized leading the formation of crew-cut aggregates in water (Riegel, I. C.; Eisenberg, A.; Petzhold, C. L.; Samios, D. Langmuir 2002, 18, 3358). Herein, we focus on the copolymer's ability in the nonquaternized version to undergo self-aggregation in dimethylformamide (DMF), a selective solvent for the middle block. Light scattering measurements showed that formation of well-defined flowerlike micelles is likely to occur. Aggregates with a relatively narrow distribution, small average size, and number of aggregation ranging from 21 to 39 chains/micelle were experimentally observed. The results also suggested that approximately 5-6 polymeric units per each short outer block are needed to induce aggregation. The middle block length governs the size of the micelles and influences the number of aggregation of the resultant particles as well. Furthermore, when the polystyrene middle block was particularly long (degree of polymerization DP > 600), dynamic and static light scattering measurements suggested the formation of bridged micelles in an open structure in concentrations as low as 15 mg mL-1.
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Affiliation(s)
- Fernando C Giacomelli
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, 91501-970 Porto Alegre, Brazil
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15
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Tuzar Z, Kadlec P, Stepánek P, Kríz J, Nallet F, Noirez L. Micelles of a diblock copolymer of styrene and ethylene oxide in mixtures of 2,6-lutidine and water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:13863-13865. [PMID: 19360951 DOI: 10.1021/la803397g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We studied the micelle formation of a diblock copolymer of styrene and ethylene oxide in mixtures of 2,6-dimethylpyridine (2,6-lutidine) and water. Micelles are formed in a broad solvent composition range with a volume fraction of water ranging from 0.05 to 0.85, where neither polystyrene nor polyethylene oxide homopolymers are soluble. The diffusion behavior of pure solvent mixtures and in solutions of copolymer micelles is reported. In LTD/water mixtures, two diffusive processes corresponding to self-difusion and two modes belonging to mutual diffusion and diffusion of solvent clusters have been found. In copolymer solutions, the mode of copolymer micelle diffusion replaces the mode of solvent cluster diffusion. Quasielastic light scattering, small-angle neutron scattering, and pulsed-field gradient NMR have been employed in our study.
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Affiliation(s)
- Z Tuzar
- Institute of Macromolecular Chemistry, Heyrovský Sq. 2, 16206 Prague 6, Czech Republic
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