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Showing 1 to 20 of 858 for “"blends"”.
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Miscibility of polymer blends
… reason experiments have been performed on PVME blends with PS of different levels of sulfonation (SPS). Selective deuteration (d-PS) was used to identify and assign some absorption peaks in the infrared spectra. DSC measurements have shown that only one Tg is present for all blends prepared by …
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Characterization and optimization of polyethylene blends
Several series of polyethylene (PE) blends were prepared where one component is a conventional PE and the second is a conventional linear low-density polyethylene (LLDPE) or a metallocene-catalyzed LLDPE. A two-step isothermal annealing (TSIA) procedure is developed enabling the satisfactorily …
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Physical Aging of Miscible Polymer Blends
… were assessed for two different miscible polymer blends as a function of both composition and aging temperature. This investigation considered the physical aging behavior of blends containing atactic polystyrene (a-PS) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) as well as mixtures of …
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Thermodynamic Interactions in Polydiene/Polyolefin Blends
Thermodynamic interactions in blends of polydienes and polyolefins were investigated using small angle neutron scattering (SANS). Model polydienes with controlled molecular weight, dispersity, and precise chemical structure were synthesized using anionic polymerization, and subsequently saturated …
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Plasticized lignin-PVC blends for flooring
The present research, studies the feasibility of replacing part of the PVC in the formulation of flooring materials by lignin, an abundant and renewable natural polymer. The utilization of lignin, is aimed to develop more cost-effective flooring materials with appreciable mechanical properties, to …
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Structure and Properties of Polymer Blends
… 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 accelerated weathering of these polymers …
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Thermoplastic xylan derivatives and related blends
… ratio and composition on the texture of melt-blends of hydroxypropyl cellulose and polystyrene was studied for viscosity ratios of 0.08 to 0.55. Blends were examined by SEM and TEM. It was found that composition was the determining factor in texture, and not viscosity ratio over the range …
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The rheology of liquid crystal polymer blends.
… 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 Hounsfield tensometer and a Houndsfield swinging arm impact rig. The addition …
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Nerve tissue engineering using blends of Polyhydroxyalkanoates
… through the fabrication of composites and blends. Such modifications allow for further tailoring of properties such as biocompatibility, mechanical properties and degradation times required for specific physiological conditions. PHAs have been used for the manufacture of a wide variety of …
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Reactive modification of polyesters and their blends
… end groups. Reactive blending of PP/UP blends through peroxide modification gave finer and more uniform morphology than unreacted blends and at a given PP/UP weight ratio more thermoplastic elastomers-like rheological behavior. This is due to the continuously decreasing viscosity ratio …
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Characterisation of Silsesquioxane-Poly(Methyl Methacrylate) blends
Silsesquioxanes are a novel hybrid material that have advantageous properties intermediate of polymers and ceramics, due to their inorganic-organic molecular structure. Current research has focused on the potential of this hybrid to enhance conventional materials. Through the incorporation of …
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Blends of Biodegradable Thermoplastics With Lignin Esters
Thermoplastic blends of several biodegradable polymers with lignin (L) and lignin esters were prepared by solvent casting and melt processing. Among the biodegradable thermoplastics were cellulose acetate butyrate (CAB), poly-hydroxybutyrate (PHB), poly-hydroxybutyrate-co-valerate (PHBV), and a …
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Oxidative stability of Menhaden/Soybean oil blends
… of volatile compounds in menhaden/soybean oil blends and to correlate total volatiles with sensory odor scores. Specially Processed Menhaden Oil (SPMO) was supplied by Zapata Haynie Corporation (Reedville, VA). Blends of 0%, 10%, 20%, and 100% menhaden oil were stored for 15 weeks at 22 C, in …
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Crystallization kinetics of polylactide and its blends
… and PLA-DL produced were then utilized to make blends of semicrystalline/amorphous components. The compatibility of the blends was investigated by determining their Tg with a DSC. However, because of the proximity of the Tg's of the two components, a new approach , which utilized the effects of …
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Polylactic Acid-Based Polymer Blends for Durable Applications
… durable goods is achieved.;Polycarbonate rich blends with less than 30% PLA as the dispersed phase showed excellent property retention after the accelerated aging tests. Formulations with up to 20% PLA content had degradation results that were nearly identical to those of 100% polycarbonate, …
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Controlled Oxidation Studies of Coal/Refuse Fuel Blends
A study of the controlled combustion of blends of biomass materials and coals was conducted. Crushed limestone was added to the blends as an absorbent for sulfur oxides. The samples were combusted in quartz-fiber crucibles in a forced air furnace. Combustion at different times and temperatures were …
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Novel Polyhydroxyalkanoate blends: their characterisation and possible applications
… work has led to the development of novel PHA blends with new properties, which can be exploited in a variety of applications including nerve tissue engineering.
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