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Showing 1 to 20 of 105 for “"polymer blends"”.
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Miscibility of polymer blends
In this work an attempt is made to correlate polymer miscibility with diffusion and with molecular interactions. A system with lower critical solubility temperature has been selected, namely polystyrene (PS) and polyvinyl methyl ether (PVME). Most of the published work has been done on polymers in …
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Physical Aging of Miscible Polymer Blends
… aging measurements were performed on various polymeric glasses with the overriding goal of developing a better molecular picture of the nonequilibrium glassy state. To this end, aging-induced changes in mechanical properties and in the thermodynamic state (volume and enthalpy) were assessed …
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Structure and Properties of Polymer Blends
… morphology, light and thermal stability of pure polymers (eg LDPE, PP etc) and blends of PE/PVC, PE/PP and PE/PS with and without additives have been studied using a variety of physical and chemical techniques. The change in mechanical properties occurring during the ultra-violet light …
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The rheology of liquid crystal polymer blends.
… interaction between liquid crystal and isotropic polymers. An investigation of the rheological behaviour has been carried out on blends containing small additions of a main chain thermotropic liquid crystal polymers using capillary rheometry. Samples of these blends were moulded and tested using a …
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Polylactic Acid-Based Polymer Blends for Durable Applications
… or compounded with a polycarbonate (PC) polymer phase to protect the PLA phase and to enhance the mechanical properties of the blend. If a material containing biologically sourced components with good mechanical properties can be created, it would be desirable for durable uses such as …
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Compatibilisation of heterogeneous polymer blends by reactive processing
… and ethylene-co-propylene-co-cyclopentadiene terpolymer, EPDM, with acrylic acid, AA, in a melt reactive processing procedure, in the presence of peroxide, trigonox 101, and coagents, Divinyl benzene, DVB (for PS), and trimethylolpropane triacrylate, TRIS (for EPDM), were successfully carried …
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Modification of electrodes by electronically conductive polymer blends
… limiting factor for overall charge delivery in a polymer film coated on an electrode surface. Our goal was to find a better conducting polymer matrix to explore the enhancement of electron transport. Our solution was to use $\pi$-conjugated, electronically conductive polymers as modifiers of …
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Mechanochemical synthesis and evaluation of rubber-thermoplastic polymer blends
Natural rubber-polypropylene (NR/PP)blends have been studied under dif ferent conditions vis. processing parameters, mixer and at different ratios. It has been found that the requirement of a typical thermo plastic rubber can be achieved at a ratio of NR to PP of 60:40. It was found that chemical …
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The chemical modification of polymer blends by reactive processing
… the concepts of the chemical modification of polymer blends by reactive processing using interlinking agents (multi-functional, activated vinyl compounds; trimethylolpropane triacrylates {TRIS} and divinylbenzene {DVD}) to target in-situ interpolymer formation between immiscible polymers in …
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Controlling Cocontinuous Polymer Blends with Nanofillers Jammed at the Interface
Cocontinuous polymer blends are composed of two or more immiscible or partially miscible polymers coexisted within the same volume in multiple interpenetrated networks. They can be created by either melt compounding of immiscible polymers or phase separation of partially miscible polymer pairs via …
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Chemical analysis of polymer blends via synchrotron X-ray tomography
Material properties of industrial polymer blends are of great importance. X-ray tomography has been used to obtain spatial chemical information about various polymer blends. The spatial images are acquired with synchrotron X-ray tomography because of its rapidity, good spatial resolution, large …
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Compatibilisation and stabilisation of immiscible polymer blends by reactive processing
… synthetic routes for production of PP/EPDM copolymers for the purpose of compatibilisation of PP/EPDM blends. The MA-functionalisation was achieved using an internal mixer in the presence of low concentrations (less than 0.01 molar ratio) of a free radical initiator. Various methods were used …
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Polymer blends formed by the solid state mechanical alloying process
… describes the use of the MA process to form polymer blends. Until recently there has been no published work discussing the possibility of using this technique with polymers. This research lays the ground work for using the MA process to produce polymer blends by comparing this technique to …
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In situ composites of compatibilized polypropylene/liquid crystalline polymer blends
… polypropylene (PP)/ liquid crystalline polymer blends to obtain high mechanical properties from injection molded samples were investigated in this dissertation. Three liquid crystalline polymers (LCPs), two liquid crystalline (LC) copolyesters and one LC poly(ester-amide), were used. The …
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Directed Phase Separation of Polymer Blends on Binary-Patterned Polymer Brushes
Self-assembly of well-defined polymer microstructures is of interest for applications such as polymer solar cells, light emitting diodes, microelectronics and biosensors. Chemically patterned substrates can direct the phase separation of thin films of polymer blends, producing controlled …
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Supercritical CO2 foamed biodegradable polymer blends of polycaprolactone and Mater-Bi.
Supercritical CO2 foam processing of biopolymers represents a green processing route to environmentally friendly media and packaging foams. Mater-Bi, a multiconstituent biopolymer of polyester, starch and vegetable oils has shown much promise for biodegradation. The polymer, however, is not …
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In-situ production of electrically conductive polyaniline fibres from polymer blends
Polymers and polymer-based composite materials with electro-conductive properties, respectively, are materials with several potential applications. New materials are being offered in every area and novel products are constantly being introduced. Among these new materials, composites made of …
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Studies of the Evaluation of Solid Phase Dispersants in Polymer Blends
… problem of recycling mixtures of thermoplastic polymers. Low-density polyethylene (LDPE) and polystyrene (PS) were chosen for this study because of the mechanical properties of these blends. To improve performance, block and graft copolymers of ethylene-styrene as solid phase dispersants (SPDs) …
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Non-Covalent Interactions in Polymeric Materials: From Ionomers to Polymer Blends
… active compatibilizers for a number of polymer blend systems because of specific interactions that may develop between the ionic groups and complementary functional groups on other polar polymers within the blends. The successful compatibilization of polyester/polyamide blends (prepared …
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