1
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Müllers S, Florea-Hüring M, von Vacano B, Bruchmann B, Rühe J. Hairy surfaces by cold drawing leading to dense lawns of high aspect ratio hairs. Sci Rep 2022; 12:9952. [PMID: 35705571 PMCID: PMC9200784 DOI: 10.1038/s41598-022-13419-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 04/22/2022] [Indexed: 11/18/2022] Open
Abstract
The surfaces of many organisms are covered with hairs, which are essential for their survival in a complex environment. The generation of artificial hairy surfaces from polymer materials has proven to be challenging as it requires the generation of structures with very high aspect ratios (AR). We report on a technique for the fabrication of surfaces covered with dense layers of very high AR nanoscale polymer hairs. To this, templates having pores with diameters of several hundred nanometers are filled with a polymer melt by capillary action. The polymer is then allowed to cool and the template is mechanically removed. Depending on the conditions employed, the formed structures can be a simple replica of the pore, or the polymer is deformed very strongly by cold drawing to yield in long hairs, with hair densities significantly up to 6,6 × 108 hairs/cm2 at AR of much higher than 200. The mechanism of hair formation is attributed to a delicate balance between the adhesion forces of the polymer in the pore and the yield force acting on it during mechanically demolding. We demonstrate how with very little effort and within a timescale of seconds unique topographies can be obtained, which can dramatically tailor the wetting properties of common polymers.
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Affiliation(s)
- Stefan Müllers
- Department of Microsystems Engineering-IMTEK, University of Freiburg, Georges-Köhler-Allee 103, 79110, Freiburg, Germany
| | - Mara Florea-Hüring
- Department of Microsystems Engineering-IMTEK, University of Freiburg, Georges-Köhler-Allee 103, 79110, Freiburg, Germany
| | - Bernhard von Vacano
- BASF SE, Advanced Materials and Systems Research, Carl-Bosch-Strasse 38, 67056, Ludwigshafen, Germany
| | - Bernd Bruchmann
- BASF SE, Advanced Materials and Systems Research, Carl-Bosch-Strasse 38, 67056, Ludwigshafen, Germany
| | - Jürgen Rühe
- Department of Microsystems Engineering-IMTEK, University of Freiburg, Georges-Köhler-Allee 103, 79110, Freiburg, Germany. .,livMatS@Freiburg Institute for Interactive Materials and Bioinspired Technologies (FIT), University of Freiburg, Georges-Köhler-Allee 105, 79110, Freiburg, Germany.
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2
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Huang Z, Cuniberto E, Park S, Kisslinger K, Wu Q, Taniguchi T, Watanabe K, Yager KG, Shahrjerdi D. Mechanisms of Interface Cleaning in Heterostructures Made from Polymer-Contaminated Graphene. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2201248. [PMID: 35388971 DOI: 10.1002/smll.202201248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Indexed: 06/14/2023]
Abstract
Heterostructures obtained from layered assembly of 2D materials such as graphene and hexagonal boron nitride have potential in the development of new electronic devices. Whereas various materials techniques can now produce macroscopic scale graphene, the construction of similar size heterostructures with atomically clean interfaces is still unrealized. A primary barrier has been the inability to remove polymeric residues from the interfaces that arise between layers when fabricating heterostructures. Here, the interface cleaning problem of polymer-contaminated heterostructures is experimentally studied from an energy viewpoint. With this approach, it is established that the interface cleaning mechanism involves a combination of thermally activated polymer residue mobilization and their mechanical actuation. This framework allows a systematic approach for fabricating record large-area clean heterostructures from polymer-contaminated graphene. These heterostructures provide state-of-the-art electronic performance. This study opens new strategies for the scalable production of layered materials heterostructures.
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Affiliation(s)
- Zhujun Huang
- Electrical and Computer Engineering, New York University, Brooklyn, NY, 11201, USA
| | - Edoardo Cuniberto
- Electrical and Computer Engineering, New York University, Brooklyn, NY, 11201, USA
| | - Suji Park
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Kim Kisslinger
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Qin Wu
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Takashi Taniguchi
- International Center for Materials Nanoarchitectonics, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki, 305-0044, Japan
| | - Kenji Watanabe
- Research Center for Functional Materials, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki, 305-0044, Japan
| | - Kevin G Yager
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Davood Shahrjerdi
- Electrical and Computer Engineering, New York University, Brooklyn, NY, 11201, USA
- Center for Quantum Phenomena, Physics Department, New York University, New York, NY, 10003, USA
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3
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Charfeddine I, Majesté J, Carrot C, Lhost O. Surface tension and interfacial tension of polyolefins and polyolefin blends. J Appl Polym Sci 2022. [DOI: 10.1002/app.51885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ilhem Charfeddine
- Univ Lyon, UJM‐Saint‐Etienne, CNRS, IMP UMR5223 Saint‐Etienne France
- TOTAL Research and Technology Feluy Belgium
| | | | - Christian Carrot
- Univ Lyon, UJM‐Saint‐Etienne, CNRS, IMP UMR5223 Saint‐Etienne France
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4
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Le Boterff J, Charlon S, Soulestin J. How does the temperature of polymer bead influence the kinetics of coalescence in additive manufacturing processes? J Appl Polym Sci 2022. [DOI: 10.1002/app.51782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Julien Le Boterff
- IMT Nord Europe, Institut Mines‐Télécom, Univ. Lille, Centre for Materials and Processes Centre Lille France
| | - Sébastien Charlon
- IMT Nord Europe, Institut Mines‐Télécom, Univ. Lille, Centre for Materials and Processes Centre Lille France
| | - Jérémie Soulestin
- IMT Nord Europe, Institut Mines‐Télécom, Univ. Lille, Centre for Materials and Processes Centre Lille France
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5
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Martinez J, Aghajani M, Lu Y, Blevins AK, Fan S, Wang M, Killgore JP, Perez SB, Patel J, Carbrello C, Foley S, Sylvia R, Long R, Castro R, Ding Y. Capillary bonding of membranes by viscous polymers: Infiltration kinetics and mechanical integrity of the bonded polymer/membrane structures. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.119898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Doineau E, Coqueugniot G, Pucci MF, Caro AS, Cathala B, Bénézet JC, Bras J, Le Moigne N. Hierarchical thermoplastic biocomposites reinforced with flax fibres modified by xyloglucan and cellulose nanocrystals. Carbohydr Polym 2020; 254:117403. [PMID: 33357891 DOI: 10.1016/j.carbpol.2020.117403] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 11/09/2020] [Accepted: 11/10/2020] [Indexed: 01/31/2023]
Abstract
This work is focused on the modification of the interphase zone in short flax fibres / polypropylene (PP) composites by a bio-inspired modification of fibres called "nanostructuration" that uses the adsorption of biomass by-products, i.e. cellulose nanocrystals (CNC) and xyloglucan (XG), to create hierarchical flax fibres. The wettability and interfacial adhesion study reveals a strong decrease in the polar character of CNC modified flax fibres, hence increasing the work of adhesion with PP. Moreover, combining XG/CNC modified interphases with MAPP coupling agent enhances the ultimate mechanical properties of biocomposites with higher tensile strength and work of rupture, and modifies failure mechanisms as revealed by in situ micro-mechanical tensile SEM experiments. Bio-based hierarchical composites inspired by naturally occurring nanostructures open a new path for the development of sustainable composites with enhanced structural properties.
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Affiliation(s)
- Estelle Doineau
- Polymers Composites and Hybrids (PCH), IMT Mines Ales, Ales, France(1); Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LGP2, F-38000, Grenoble, France(1); INRAE, UR BIA, F-44316, Nantes, France(1).
| | - Guillaume Coqueugniot
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LGP2, F-38000, Grenoble, France(1)
| | | | | | | | | | - Julien Bras
- Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LGP2, F-38000, Grenoble, France(1); Nestle Research Center, CH - 1000, Lausanne, Switzerland
| | - Nicolas Le Moigne
- Polymers Composites and Hybrids (PCH), IMT Mines Ales, Ales, France(1).
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7
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Ohzono T, Saed MO, Terentjev EM. Enhanced Dynamic Adhesion in Nematic Liquid Crystal Elastomers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1902642. [PMID: 31183920 DOI: 10.1002/adma.201902642] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 05/21/2019] [Indexed: 06/09/2023]
Abstract
Smart adhesives that undergo reversible detachment in response to external stimuli enable a wide range of applications in household products, medical devices, or manufacturing. Here, a new model system for the design of smart soft adhesives that dynamically respond to their environment is presented. By exploiting the effect of dynamic soft elasticity in nematic liquid crystal elastomers (LCE), the temperature-dependent control of adhesion to a solid glass surface is demonstrated. The adhesion strength of LCE is more than double in the nematic phase, in comparison to the isotropic phase, further increasing at higher detachment rates. The static work of adhesion, related to the interfacial energy of adhesive contact, is shown to change very little within the explored temperature range. Accordingly, the observed enhanced adhesion in the nematic phase is primarily attributable to the increased internal energy dissipation during the detachment process. This adhesion effect is correlated with the inherent bulk dynamic-mechanical response in the nematic LCE. The reported enhanced dynamic adhesion can lead to the development of a new class of stimuli-responsive adhesives.
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Affiliation(s)
- Takuya Ohzono
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, UK
- Research Institute for Electronics and Photonics, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, 305-8565, Japan
| | - Mohand O Saed
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Eugene M Terentjev
- Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge, CB3 0HE, UK
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8
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Lee K, Park SH, Lee J, Ryu S, Joo C, Ryu W. Three-Step Thermal Drawing for Rapid Prototyping of Highly Customizable Microneedles for Vascular Tissue Insertion. Pharmaceutics 2019; 11:pharmaceutics11030100. [PMID: 30813634 PMCID: PMC6470662 DOI: 10.3390/pharmaceutics11030100] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 02/20/2019] [Accepted: 02/21/2019] [Indexed: 01/24/2023] Open
Abstract
Microneedles (MNs) have been extensively developed over the last two decades, and highly efficient drug delivery was demonstrated with their minimal invasiveness via a transdermal route. Recently, MNs have not only been applied to the skin but also to other tissues such as blood vessels, scleral tissue, and corneal tissue. In addition, the objective of the MN application has been diversified, ranging from drug delivery to wound closure and biosensing. However, since most MN fabrication methods are expensive and time-consuming, they are inappropriate to prototype MNs for various tissues that have different and complex anatomies. Although several drawing-based techniques have been introduced for rapid MN production, they fabricated MNs with limited shapes, such as thin MNs with wide bases. In this study, we propose a three-step thermal drawing for rapid, prototyping MNs that can have a variety of shapes and can be fabricated on curved surfaces. Based on the temperature control of polymer bridge formation during thermal drawing, the body profile and aspect ratios of MNs were conveniently controlled, and the effect of temperature control on the body profile of MNs was explained. Thermally drawn MNs with different shapes were fabricated both on flat and curved surfaces, and they were characterized in terms of their mechanical properties and insertion into vascular tissue to find an optimal shape for vascular tissue insertion.
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Affiliation(s)
- KangJu Lee
- Department of Mechanical Engineering, Yonsei University, Yonsei-ro 50, Seoul 03722, Korea.
| | - Seung Hyun Park
- Department of Mechanical Engineering, Yonsei University, Yonsei-ro 50, Seoul 03722, Korea.
| | - JiYong Lee
- Department of Mechanical Engineering, Yonsei University, Yonsei-ro 50, Seoul 03722, Korea.
| | - Suho Ryu
- Department of Mechanical Engineering, Yonsei University, Yonsei-ro 50, Seoul 03722, Korea.
| | - Chulmin Joo
- Department of Mechanical Engineering, Yonsei University, Yonsei-ro 50, Seoul 03722, Korea.
| | - WonHyoung Ryu
- Department of Mechanical Engineering, Yonsei University, Yonsei-ro 50, Seoul 03722, Korea.
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9
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Predicting the adhesion strength of thermoplastic/glass interfaces from wetting measurements. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.08.052] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Gui C, Chen Z, Yao C, Yang G. Preparation of nickel/PA12 composite particles by defect-induced electroless plating for use in SLS processing. Sci Rep 2018; 8:13407. [PMID: 30194342 PMCID: PMC6128841 DOI: 10.1038/s41598-018-31716-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 08/06/2018] [Indexed: 11/08/2022] Open
Abstract
In this work, Ni particles/PA12 powders (Ni/PA12) and graphite oxide (GO)-encapsulated Ni particles/PA12 powders (GO-Ni/PA12) composite powders were prepared by defect-included electroless plating technique, and its laser sintered behaviour was investigated. Results showed that a lot of defects could formed on the surface of CH3COOH etched PA12 powders. The defects would induce Ni and GO-Ni particles independently plated on the PA12 surface. Adding GO in the plating solution would facilitate the deposition of Ni particles, GO, and NiO on the PA 12 surface, but inhibit the growth and the crystallinity of the Ni particles. The SLS process involved the contact of PA12 powders, the formation of sintering neck, the growth of sintering neck and the formation of fused solid. Sintering process could facilitate the re-arrangement of Ni particles due to surface tension and the growth of sintering neck. The Ni particles had well wettability, and the interfaces between Ni particles and PA 12 were contacted soundly. The tensile strength and bending strength of the 10 W-sintered Ni/PA12 specimen were 50 MPa and 60 MPa. But SLS process caused the serious aggregation of GO-Ni particles due to higher concentration, activity and surface area of GO-Ni particles.
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Affiliation(s)
- Chengmei Gui
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Zhenming Chen
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Environmental Engineering, Hezhou University, Hezhou, Guangxi, 542899, China
| | - Chenguang Yao
- Hefei Genius Advanced Materials Co., Ltd., Hefei, Anhui, 230009, China
| | - Guisheng Yang
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China.
- Shanghai Genius Advanced Materials Co., Ltd., Shanghai, 201109, China.
- Hefei Genius Advanced Materials Co., Ltd., Hefei, Anhui, 230009, China.
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11
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Zhang Y, Fuentes CA, Koekoekx R, Clasen C, Van Vuure AW, De Coninck J, Seveno D. Spreading Dynamics of Molten Polymer Drops on Glass Substrates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:8447-8454. [PMID: 28767248 DOI: 10.1021/acs.langmuir.7b01500] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Wetting dynamics drive numerous processes involving liquids in contact with solid substrates with a wide range of geometries. The spreading dynamics of organic liquids and liquid metals at, respectively, room temperature and >1000 °C have been studied extensively, both experimentally and numerically; however, almost no attention has been paid to the wetting behavior of molten drops of thermoplastic polymers, despite its importance, for example, in the processing of fiber-reinforced polymer composites. Indeed, the ability of classical theories of dynamic wetting, that is, the hydrodynamic and the molecular-kinetic theories, to model these complex liquids is unknown. We have therefore investigated the spreading dynamics on glass, over temperatures between 200 and 260 °C, of two thermoplastics: polypropylene (PP) and poly(vinylidene fluoride) (PVDF). PP and PVDF showed, respectively, the highest and lowest slip lengths due to their different interactions with the glass substrate. The jump lengths of PP and PVDF are comparable to their Kuhn segment lengths, suggesting that the wetting process of these polymers is mediated by segmental displacements. The present work not only provides evidence of the suitability of the classical models to model dynamic wetting of molten polymers but also advances our understanding of the wetting dynamics of molten thermoplastics at the liquid/solid interface.
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Affiliation(s)
- Yichuan Zhang
- Department of Materials Engineering, KU Leuven , 3001 Leuven, Belgium
- Laboratory of Surface and Interfacial Physics, Université de Mons , 7000 Mons, Belgium
| | - Carlos A Fuentes
- Department of Materials Engineering, KU Leuven , 3001 Leuven, Belgium
| | - Robin Koekoekx
- Department of Chemical Engineering, KU Leuven , 3001 Leuven, Belgium
| | - Christian Clasen
- Department of Chemical Engineering, KU Leuven , 3001 Leuven, Belgium
| | - Aart W Van Vuure
- Department of Materials Engineering, KU Leuven , 3001 Leuven, Belgium
| | - Joël De Coninck
- Laboratory of Surface and Interfacial Physics, Université de Mons , 7000 Mons, Belgium
| | - David Seveno
- Department of Materials Engineering, KU Leuven , 3001 Leuven, Belgium
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12
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Meddah C, Milchev A, Sabeur SA, Skvortsov AM. Molecular weight effects on interfacial properties of linear and ring polymer melts: A molecular dynamics study. J Chem Phys 2016; 145:194902. [PMID: 27875865 DOI: 10.1063/1.4967339] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Using molecular dynamics simulations, we study and compare the pressure, P, and the surface tension, γ, of linear chains and of ring polymers at the hard walls confining both melts into a slit. We examine the dependence of P and γ on the length (i.e., molecular weight) N of the macromolecules. For linear chains, we find that both pressure and surface tension are inversely proportional to the chain length, P(N)-P(N→∞)∝N-1,γ(N)-γ(N→∞)∝N-1, irrespective of whether the confining planes attract or repel the monomers. In contrast, for melts comprised of cyclic (ring) polymers, neither the pressure nor the surface tension is found to depend on molecular weight N for both kinds of wall-monomer interactions. While other structural properties as, e.g., the probability distributions of trains and loops at impenetrable walls appear quantitatively indistinguishable, we observe an amazing dissimilarity in the probability to find a chain end or a tagged monomer of a ring at a given distance from the wall in both kinds of polymeric melts. In particular, we demonstrate that the conformational equivalence of linear chains in a confined melt to a single chain under conditions of critical adsorption to a planar surface, established two decades ago, does also hold for ring polymers in a melt of linear chains. This analogy does not hold, however, for linear and ring chains in a confined melt of ring chains.
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Affiliation(s)
- Chahrazed Meddah
- Laboratoire d'Etude Physique des Matériaux, Faculté de Physique, Université des Sciences et de la Technologie d'Oran (USTO-MB), BP 1505 El M'naouer, 31000 Oran, Algeria
| | - Andrey Milchev
- Institute for Physical Chemistry, Bulgarian Academia of Sciences, 1113 Sofia, Bulgaria
| | - Sid Ahmed Sabeur
- Laboratoire d'Etude Physique des Matériaux, Faculté de Physique, Université des Sciences et de la Technologie d'Oran (USTO-MB), BP 1505 El M'naouer, 31000 Oran, Algeria
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13
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Effects of Formulations and Processing Parameters on Foam Morphologies in the Direct Extrusion Foaming of Polypropylene using a Single-screw Extruder. J CELL PLAST 2016. [DOI: 10.1177/0021955x05051740] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The direct extrusion foaming process of low-density polypropylene (PP) in a typical single-screw extruder is researched. Effects of five variables on the volume expansion behavior and cellular morphologies are investigated. They are three kinds of polypropylene with different melt flow rates (MFRs), two kinds of chemical blowing agents, cross-linking modification method and blending modification method, two operating parameters (the screw speed and the die temperature), and die shapes. The experimental results prove that: the lower the MFR (from 0.45 to 10 g/10 min), the better the PP foamed; use of azodicarbonamide as the blowing agent helps to achieve PP foam with larger volume expansion, while use of endothermic foaming agent EPIcor 882 results in rigid foams with lower foaming ratios; melt strength can be effectively promoted, and low-density PP foam can be produced by proper addition of cross-linking agents or blending agents properly; low die temperatures (about 155 C) and high screw speeds (from 16 to 48 rpm) are beneficial to foaming; high die pressure in some range is good for foaming, so the die in which it is easy to establish high die pressure such as the filament die, is good for low-density foams.
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14
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Cirpici BK, Wang Y, Rogers B, Bourbigot S. A theoretical model for quantifying expansion of intumescent coating under different heating conditions. POLYM ENG SCI 2016. [DOI: 10.1002/pen.24308] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Burak Kaan Cirpici
- Corlu Engineering Faculty, Civil Engineering Department; Namik Kemal University; Turkey
| | - Y.C. Wang
- School of Mechanical, Aerospace and Civil Engineering, University of Manchester; United Kingdom
| | - B.D. Rogers
- School of Mechanical, Aerospace and Civil Engineering, University of Manchester; United Kingdom
| | - S. Bourbigot
- R2Fire Group/UMET - UMR CNRS 8207, Ecole Nationale Supérieure de Chimie de Lille (ENSCL); University of Lille; 59652 Villeneuve d'Ascq France
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15
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Wang L, Zhou H, Wang X, Mi J. Modeling Solubility and Interfacial Properties of Carbon Dioxide Dissolved in Polymers. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b04343] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Linyan Wang
- State
Key Laboratory of Organic−Inorganic Composites, Beijing University of Chemical Technology, Beijing, China
- School
of Materials and Mechanical Engineering, Beijing Technology and Business University, Beijing, China
| | - Hongfu Zhou
- School
of Materials and Mechanical Engineering, Beijing Technology and Business University, Beijing, China
| | - Xiangdong Wang
- School
of Materials and Mechanical Engineering, Beijing Technology and Business University, Beijing, China
| | - Jianguo Mi
- State
Key Laboratory of Organic−Inorganic Composites, Beijing University of Chemical Technology, Beijing, China
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16
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Effect of Hybrid Talc-Basalt Fillers in the Shell Layer on Thermal and Mechanical Performance of Co-Extruded Wood Plastic Composites. MATERIALS 2015; 8:8510-8523. [PMID: 28793726 PMCID: PMC5458851 DOI: 10.3390/ma8125473] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 11/29/2015] [Accepted: 12/01/2015] [Indexed: 11/17/2022]
Abstract
Hybrid basalt fiber (BF) and Talc filled high density polyethylene (HDPE) and co-extruded wood-plastic composites (WPCs) with different BF/Talc/HDPE composition levels in the shell were prepared and their mechanical, morphological and thermal properties were characterized. Incorporating BFs into the HDPE-Talc composite substantially enhanced the thermal expansion property, flexural, tensile and dynamic modulus without causing a significant decrease in the tensile and impact strength of the composites. Strain energy estimation suggested positive and better interfacial interactions of HDPE with BFs than that with talc. The co-extruded structure design improved the mechanical properties of WPC due to the protective shell layer. The composite flexural and impact strength properties increased, and the thermal expansion decreased as BF content increased in the hybrid BF/Talc filled shells. The cone calorimetry data demonstrated that flame resistance of co-extruded WPCs was improved with the use of combined fillers in the shell layer, especially with increased loading of BFs. The combined shell filler system with BFs and Talc could offer a balance between cost and performance for co-extruded WPCs.
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17
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Khoshkava V, Kamal MR. Effect of surface energy on dispersion and mechanical properties of polymer/nanocrystalline cellulose nanocomposites. Biomacromolecules 2013; 14:3155-63. [PMID: 23927495 DOI: 10.1021/bm400784j] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Dispersion quality and polymer-filler interaction are important factors in determining the final properties of polymer nanocomposites. Surface energy of nanocrystalline cellulose (NCC) and some polymers (polypropylene, PP, and polylactic acid, PLA) was measured at room and high temperatures. NCC had higher polarity and surface energy than PP and PLA at room temperature but had a lower surface energy at higher temperatures. The effect of surface modification with alkenyl succinic anhydride (ASA) on NCC surface energy at room and high temperature was studied. Total surface energy of NCC was lowered after surface modification. Thermodynamic work of adhesion for PP/NCC and PLA/NCC was lowered by NCC surface modification. A thermodynamic analysis is proposed to estimate the dispersion energy, based on surface energy measurements at room and high temperatures. Also, a dispersion factor is defined to provide a quantitative indication of the dispersibility of nanoparticles in a polymer matrix under various conditions. The required dispersion energy was reduced by lowering the interfacial tension. On the other hand, it increased as the quality of NCC dispersion (i.e., the nanoparticle surface area) in the system was improved. Surface modification of NCC with ASA had a negative effect on the compatibility between NCC and PLA, whereas it had a positive influence on compatibility between PP and NCC.
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Affiliation(s)
- V Khoshkava
- Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, Quebec H3A 2B2, Canada
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Calò E, Massaro C, Terzi R, Cancellara A, Pesce E, Re M, Greco A, Maffezzoli A, Gonzalez-Chi PI, Salomi A. Rotational Molding of Polyamide-6 Nanocomposites with Improved Flame Retardancy. INT POLYM PROC 2013. [DOI: 10.3139/217.2552] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The aim of this work was to develop polyamide-6/ organic-modified montmorillonite (omMMT) nanocomposites for the production of hollow parts by rotational molding. Particular emphasis was placed on the mechanical and flame retardancy properties needed for the fabrication of vessels for flammable liquids. The morphology of the melt compounded nanocomposites, produced by melt compounding, was investigated by X-ray diffraction measurements (WAXD), and Transmission Electron Microscopy (TEM) showed an exfoliated structure. Rheological measurements were used in order to verify whether the viscosity of materials was adequate for rotational molding. While thermomechanical analysis has revealed that neat PA6 and its nanocomposites were not suitable for rotational molding, due to the very low thermal stability of the polymer, the addition of a thermal stabilizer, shifted the onset of degradation to higher temperatures, thus widening the processing window of both PA6 and PA6 nanocomposites. Large-scale vessel prototypes were obtained by rotational molding of thermo-stabilized PA6 and its nanocomposites, and samples extracted from the rotomolded parts were characterized with respect to physical and mechanical properties. It was found that the PA6 nanocomposites exhibited significant improvements at cone calorimeter tests in comparison with neat PA6.
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Affiliation(s)
- E. Calò
- ENEA – Department of Advanced Physical Technologies and New Materials, Brindisi Research Centre, Brindisi, Italy
| | - C. Massaro
- ENEA – Department of Advanced Physical Technologies and New Materials, Brindisi Research Centre, Brindisi, Italy
| | - R. Terzi
- ENEA – Department of Advanced Physical Technologies and New Materials, Brindisi Research Centre, Brindisi, Italy
| | - A. Cancellara
- ENEA – Department of Advanced Physical Technologies and New Materials, Brindisi Research Centre, Brindisi, Italy
| | - E. Pesce
- ENEA – Department of Advanced Physical Technologies and New Materials, Brindisi Research Centre, Brindisi, Italy
| | - M. Re
- ENEA – Department of Advanced Physical Technologies and New Materials, Brindisi Research Centre, Brindisi, Italy
| | - A. Greco
- Department of Engineering for Innovation, University of Salento, Lecce, Italy
| | - A. Maffezzoli
- Department of Engineering for Innovation, University of Salento, Lecce, Italy
| | - P. I. Gonzalez-Chi
- Centro de Investigacionn Cientifica de Yucatan, Unidad de Materiales, Merida, Yucatan, Mexico
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Lamnawar K, Bousmina M, Maazouz A. 2D Encapsulation in Multiphase Polymers: Role of Viscoelastic, Geometrical and Interfacial Properties. Macromolecules 2011. [DOI: 10.1021/ma201151k] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Khalid Lamnawar
- Laboratoire de Mécanique des Contacts et des Structures, Université de Lyon, CNRS, INSA-Lyon, LaMCoS UMR CNRS#5259, Groupe de Recherche Pluridisciplinaire en Plasturgie, F69621, France
| | - Mosto Bousmina
- Hassan II Academy of Science and Technology, Postal Code 10 100, Rabat, Morocco
| | - Abderrahim Maazouz
- Université de Lyon, F-69361 Lyon, and CNRS, UMR 5223, Ingénierie des Matériaux Polymères, INSA Lyon, F-69621 Villeurbanne, France
- Hassan II Academy of Science and Technology, Postal Code 10 100, Rabat, Morocco
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20
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Verma A, Sharma A. Submicrometer Pattern Fabrication by Intensification of Instability in Ultrathin Polymer Films under a Water–Solvent Mix. Macromolecules 2011. [DOI: 10.1021/ma200113w] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ankur Verma
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Ashutosh Sharma
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology Kanpur, Kanpur 208016, India
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21
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Liao X, Li YG, Park CB, Chen P. Interfacial tension of linear and branched PP in supercritical carbon dioxide. J Supercrit Fluids 2010. [DOI: 10.1016/j.supflu.2010.06.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Yang D, Xu Z, Liu C, Wang L. Experimental study on the surface characteristics of polymer melts. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.07.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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23
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Zhang P, Wang XJ, Yang Y, Zhou NQ. Bubble growth in the microcellular foaming of CO2/polypropylene solutions. J Appl Polym Sci 2010. [DOI: 10.1002/app.30648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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24
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Melt Properties of Poly(styrene-co-acrylonitrile) and Poly(butylene terephthalate) and their Interfacial Tension. MACROMOL CHEM PHYS 2009. [DOI: 10.1002/macp.200800452] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Park H, Park CB, Tzoganakis C, Tan KH, Chen P. Simultaneous Determination of the Surface Tension and Density of Polystyrene in Supercritical Nitrogen. Ind Eng Chem Res 2008. [DOI: 10.1021/ie071472q] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- H. Park
- Departments of Chemical Engineering, University of Waterloo, 200 University Avenue, Waterloo, Ontario, Canada N2L 3G1; Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8; and Epson Research & Development, San Jose, CA
| | - C. B. Park
- Departments of Chemical Engineering, University of Waterloo, 200 University Avenue, Waterloo, Ontario, Canada N2L 3G1; Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8; and Epson Research & Development, San Jose, CA
| | - C. Tzoganakis
- Departments of Chemical Engineering, University of Waterloo, 200 University Avenue, Waterloo, Ontario, Canada N2L 3G1; Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8; and Epson Research & Development, San Jose, CA
| | - K.-H. Tan
- Departments of Chemical Engineering, University of Waterloo, 200 University Avenue, Waterloo, Ontario, Canada N2L 3G1; Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8; and Epson Research & Development, San Jose, CA
| | - P. Chen
- Departments of Chemical Engineering, University of Waterloo, 200 University Avenue, Waterloo, Ontario, Canada N2L 3G1; Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, Ontario, Canada M5S 3G8; and Epson Research & Development, San Jose, CA
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26
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Funke Z, Hotani Y, Ougizawa T, Kressler J, Kammer HW. Equation-of-state properties and surface tension of ethylene–vinyl alcohol random copolymers. Eur Polym J 2007. [DOI: 10.1016/j.eurpolymj.2007.03.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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Park H, Park CB, Tzoganakis C, Tan KH, Chen P. Surface Tension Measurement of Polystyrene Melts in Supercritical Carbon Dioxide. Ind Eng Chem Res 2006. [DOI: 10.1021/ie0509084] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- H. Park
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue, Waterloo, Ontario, Canada N2L 3G1, Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, Canada M5S 3G8, Epson R&D, 3145 Porter Drive, Suite 104, Palo Alto, California 94304-1224
| | - C. B. Park
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue, Waterloo, Ontario, Canada N2L 3G1, Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, Canada M5S 3G8, Epson R&D, 3145 Porter Drive, Suite 104, Palo Alto, California 94304-1224
| | - C. Tzoganakis
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue, Waterloo, Ontario, Canada N2L 3G1, Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, Canada M5S 3G8, Epson R&D, 3145 Porter Drive, Suite 104, Palo Alto, California 94304-1224
| | - K. H. Tan
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue, Waterloo, Ontario, Canada N2L 3G1, Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, Canada M5S 3G8, Epson R&D, 3145 Porter Drive, Suite 104, Palo Alto, California 94304-1224
| | - P. Chen
- Department of Chemical Engineering, University of Waterloo, 200 University Avenue, Waterloo, Ontario, Canada N2L 3G1, Microcellular Plastics Manufacturing Laboratory, Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, Canada M5S 3G8, Epson R&D, 3145 Porter Drive, Suite 104, Palo Alto, California 94304-1224
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28
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Mathematical modeling and numerical simulation for nucleated solution flow through slit die in foam extrusion. POLYM ENG SCI 2006. [DOI: 10.1002/pen.20536] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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Otake K, Kobayashi M, Ozaki Y, Yoda S, Takebayashi Y, Sugeta T, Nakazawa N, Sakai H, Abe M. Surface activity of myristic acid in the poly(methyl methacrylate)/supercritical carbon dioxide system. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:6182-6186. [PMID: 15248701 DOI: 10.1021/la0363783] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
To confirm the surface activity of myristic acid in the dispersion polymerization of vinyl monomers in scCO2, the interfacial tension (IFT) at the polymer/supercritical carbon dioxide (scCO2) interface has been measured. For the IFT measurements, a high-pressure pendant drop apparatus was constructed. The IFT data was obtained by the axisymmetric drop shape analysis of melt polymer droplets formed at the tip of a capillary. The reliability of the apparatus was confirmed by measuring the IFT of polystyrene (PS)/scCO2 and polypropylene (PP)/CO2 systems. The IFT of the poly(methyl methacrylate) (PMMA)/scCO2 system with and without myristic acid was also measured. The IFT decreased on addition of myristic acid. The magnitude of the IFT depression due to the myristic acid was comparable to that of PS/scCO2 systems with the block copolymer surfactant, PS-b-poly(fluorooctyl acrylate). The surface activity of the myristic acid was confirmed by the decrease of IFT.
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Affiliation(s)
- Katsuto Otake
- National Institute of Advanced Industrial Science and Technology, Nanotechnology Research Institute, Higashi 1-1-1, Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan.
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30
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Demarquette NR, Da Silva FT, Brandi SD, Gouvêa D. Surface tension of polyethylene used in thermal coating. POLYM ENG SCI 2004. [DOI: 10.1002/pen.11298] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Demarquette NR, De Souza AMC, Palmer G, Macaubas PHP. Comparison between five experimental methods to evaluate interfacial tension between molten polymers. POLYM ENG SCI 2004. [DOI: 10.1002/pen.10055] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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32
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Kwok DY, Lam CNC, Li A, Zhu K, Wu R, Neumann AW. Low-rate dynamic contact angles on polystyrene and the determination of solid surface tensions. POLYM ENG SCI 2004. [DOI: 10.1002/pen.10338] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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Park CB, Park SS, Ladin D, Naguib HE. On-line measurement of the PVT properties of polymer melts using a gear pump. ADVANCES IN POLYMER TECHNOLOGY 2004. [DOI: 10.1002/adv.20020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Moreira JC, Demarquette NR. Influence of temperature, molecular weight, and molecular weight dispersity on the surface tension of PS, PP, and PE. I. Experimental. J Appl Polym Sci 2001. [DOI: 10.1002/app.2036] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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35
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Menke TJ, Funke Z, Maier RD, Kressler J. Surface Tension Measurements on Ethene−Butene Random Copolymers and Different Polypropenes. Macromolecules 2000. [DOI: 10.1021/ma992122l] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- T. J. Menke
- Fachbereich Ingenieurwissenschaften, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle (Saale), Germany, and BASF AG, D-67056 Ludwigshafen, Germany
| | - Z. Funke
- Fachbereich Ingenieurwissenschaften, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle (Saale), Germany, and BASF AG, D-67056 Ludwigshafen, Germany
| | - R.-D. Maier
- Fachbereich Ingenieurwissenschaften, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle (Saale), Germany, and BASF AG, D-67056 Ludwigshafen, Germany
| | - J. Kressler
- Fachbereich Ingenieurwissenschaften, Martin-Luther-Universität Halle-Wittenberg, D-06099 Halle (Saale), Germany, and BASF AG, D-67056 Ludwigshafen, Germany
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36
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Wulf M, Michel S, Grundke K, Kwok DY, Neumann AW. Simultaneous Determination of Surface Tension and Density of Polymer Melts Using Axisymmetric Drop Shape Analysis. J Colloid Interface Sci 1999; 210:172-181. [PMID: 9924121 DOI: 10.1006/jcis.1998.5942] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
By employing a new strategy, we show that axisymmetric drop shape analysis (ADSA) can be used to determine simultaneously the surface tension and the density of polymer melts from sessile drops at elevated temperatures. To achieve this, two developments were necessary. First, the ADSA algorithm had to be modified to replace the density by the mass of the drop as an input parameter. Since ADSA also yields the volume, the density became output rather than input. Second, a closed high-temperature chamber whose temperature could be precisely controlled and a sample holder that allowed the formation of highly axisymmetric sessile drops at elevated temperatures had to be developed. For a typical polymeric material (polystyrene), it is demonstrated that measurements with sessile drops yield essentially the same surface tension values and temperature coefficients as measurements with pendant drops. The densities determined with ADSA are comparable to independent PVT results. Copyright 1999 Academic Press.
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Affiliation(s)
- M Wulf
- Institute of Polymer Research, Hohe Str. 6, Dresden, 01069, Germany
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