Read selfassociation versus interassociation in hydrogen bonded polymer blends. There are various consequences of the compositional heterogeneities or clustering that. Pdf hydrogenbonding in polymer blends researchgate. Walker, christopher hincke, caitlin stevens, peter m. Surface segregation in polymer blends and interpolymer complexes with increasing hydrogen bonding interactions shiyong liu,1 chiming chan,2 lutao weng,3 ming jiang4 1department of polymer science and engineering, university of science and technology of china, hefei, 230026, p. Since then, there has been significant progress in the field of hydrogenbonded polymer blends through the work of many research groups, with several hundred papers published since 1995. There are a few polymer pairs which require no specific interpolymer interactions 1921. Studies on specific and hydrogen bonding interaction of. Here, the factors affecting the formation and stability of hydrogen bonds, the effects of hydrogen bonds on the miscibility, the properties of blends and.
A flory lattice model is used to obtain an expression for the free energy of mixing. Lightscattering studies on hydrogenbonded polymer blends. Two modified polystyrenes containing 5 and 15 mol %, respectively, 4. Resonance effect on self and interassociation hydrogen. High thermal conductivity in amorphous polymer blends by. Complex of poly4vinylpyridine and small dendritic benzoic acid derivative. Blends involving polymers containing methacrylic acid and vinylpyridine groups.
State of the art, new challenges, and opportunities jyotishkumar parameswaranpillai, sabu thomas, and yves grohens 1. Quantitative analyses of the fraction of hydrogen bonded carbonyl groups were obtained by fti. Polymers with multiple hydrogenbonded end groups and. Intramolecular screening effects in polymer mixtures. Mixing the designed block copolymers and i2 with different blend ratios the blend ratio, f, is the molar ratio of the imidazolyl side groups to. The blending of polymethyl methacrylate pmma, a hydrogen bond acceptor. Hydrogen bonding in polymeric materials wiley online books. Read the prediction of hydrogen bonded polymer blend phase behavior using equilibrium constants determined from low molar mass analogues, macromolecular chemistry and physics on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at. Spacerlengthdependent association in polymers with multiplehydrogenbonded end groups. Pdf monolayers of hydrogenbonded polymer blends at the.
Mixture of two or more fractions of the same polymer each of which has different molecular weight distribution. Spectroscopic evidence is presented to indicate that local screening effects are important in polymer mixtures. C 3rd edn, specific interactions and the miscibility of polymer blends, technomic publishing, lancaster. Selfassociation versus interassociation in hydrogen bonded polymer blends. Lec1 introduction to polymer blend types of polymer blends. Determination of equilibrium constants from miscible poly2,6dialkyl4vinyl phenol blends. After some years of postdoctoral research work there and in the university of akron, usa, he joined national sun yatsen university as a faculty member. Department of materials science and engineering, the. Shiaowei kuo is professor in the department of materials and optoelectronic science at national sun yatsen university, taiwan.
China 2department of chemical engineering, biotechnology research institute, hong kong university of. He received his phd in applied chemistry from national chiaotung university, taiwan. University of groningen random copolymer effect in self. Complementary hydrogenbonded thermoreversible polymer. Introducing functional groups to one component to make. Assignments of bands due to hydrogen bonded groups are made on the basis of whether the proton and oxygen in a particular oh group are both involved in hydrogen bonds as donors and acceptors, respectively or whether one or the other is free not hydrogen bonded. A high density of strong hydrogen bonds connecting two polymers that are homogeneously mixed in a thin film is shown to enhance the intrachain thermal conductance, boosting thermal transport in. Comparison of theoretical and experimental miscibility windows for poly2,6dialkyl4vinyl phenol blends, polymer on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Several specific interpolymer interactions, such as charge transfer, 14, ionamide 15, iondipole 16 and hydrogen bonding 3, 17, 18, have been found to work in miscible blends. Pdf lightscattering studies on hydrogenbonded polymer. Phase behavior of complementary multiply hydrogen bonded end. Strong screening effect of polyhedral oligomeric silsesquioxanes poss nanoparticles on hydrogen bonded polymer blends by chinwei chiou 1, yungchih lin 1, lei wang 2, chiharu hirano 2, yoshinori suzuki 2, teruaki hayakawa 2 and shiaowei kuo 1.
In this blend system, these equilibria can be described by four different constants. To characterize the effectiveness of the mhb interaction in the melt, blends of chainendfunctionalized linear polymers were cast into films, annealed at various temperatures above tg, and then quenched, and their structures were analyzed by transmission electron microscopy tem and differential scanning calorimetry dsc. The hydrogen bond in polymer blends is an interesting and important subject of research as its presence usually enhances the miscibility of the blend. Phase behavior of a hydrogen bonded polymer with lamellatocylinder transition. Hydrogen bonding interactions to effect miscibility were related to the number of proton donating groups in the modified polystyrene, and these were studied in regard to lower critical solution temperatures and the glass transition temperatures of the hydrogen bonded blends.
Polymer blends are made from the combination of two or more polymer components, having staggering and incredible applications in numerous fields due to their advanced properties. Polymer compatibilization through hydrogen bonding. Strong screening effect of polyhedral oligomeric silsesquioxanes poss nanoparticles on hydrogen bonded polymer blends chinwei chiou 1, yungchih lin 1, lei wang 2, chiharu hirano 2, yoshinori suzuki 2, teruaki hayakawa 2 and shiaowei kuo 1, 1 department of materials and optoelectronic science, center for functional polymers and. Roland, department of materials science and engineering and materials research institute. To enhance the formation of singlephase, miscible polymer blends, it is. Strong screening effect of polyhedral oligomeric silsesquioxanes. Hydrogenbonding in polymer bl ends shiaowei kuo received. Polymer communication thermal properties and hydrogen. The application of association models to the description of the free energy changes related to hydrogen bonding between components of binary polymer blends is discussed for a system where one. Selfassociation versus interassociation in hydrogen. Hydrogen bonding in polymeric materials shiaowei kuo. A mean field description of these mixtures is presented which indicates that there should be an infinite correlation length above some percolation threshold. Compositional heterogeneities in hydrogenbonded polymer. Since then, there has been significant progress in the field of hydrogen bonded polymer blends through the work of many research groups, with several hundred papers published since 1995.
For nonhydrogen bonded polymer blends in the floryhuggins case only dispersive forces present, miscible blends can be obtained only when the critical value of. Hydrogen bonding in polymer blends is a topic of great interest to polymer scientists because such systems have many potential applications. Pressure effects on the segmental dynamics of hydrogenbonded polymer blends s. Phase behavior of complementary multiply hydrogen bonded. A grand challenge in designing polymeric materials is to tune their properties by macromolecular engineering. Request pdf hydrogen bonds in polymer blends the hydrogen bond in polymer blends is an interesting and important subject of research as its presence usually enhances the miscibility of the. To this end, it discusses all relevant aspects from the fundamentals, via characterization, to properties and applications in various polymeric materials, including polymer blends, block copolymers, mesoporous. Blends containing poly4hydroxystyreneco4 methoxystyrene copolymers. The objective of polymer blending is a practical one of achieving commercially viable products through either unique properties or lower cost than some. Blends of thermoplastic polymers with vinyl ester resins. The accessibility of functional groups in hydrogenbonded polymer blends can signi. Successive desorption experiments of water vapor in the hydrogen.
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