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Showing 1 to 6 of 6 for “"Oriented polymers"”.
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Processing and thermal properties of molecularly oriented polymers
High molecular weight polymers that are linear in molecular construction can be oriented such that some of their physical properties in the oriented direction are enhanced. For over 50 years polymer orientation and processing has been extensively studied to improve the mechanical properties of …
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An investigation of oriented polymers for power transmission applications
The feasibility of using oriented polymer technology in the design and manufacture of mechanical power transmission belts has been investigated. Working from an initial selection of polymers a die-drawing technique for orienting the polymers was devised, and the static and dynamic mechanical …
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Positron interactions with oriented polymers and with chiral quartz crystals
Positron annihilation in various materials has been applied to characterize microstructure for decades. In this work, PALS was used to study material nanostructure, with a focus on the size and density of free volume and hole relaxation properties in polycarbonate (PC) and polymethylmethacrylate …
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The effects of molecular orientation on the physical aging behavior of oriented glassy amorphous polymers
… the rate of physical aging in amorphous glassy polymers. There is already a large body of literature concerning the phenomenon of physical aging, although the vast majority has been directed toward isotropic, unoriented systems. The importance of this study is therefore twofold: first, from a …
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Tensile and fracture behaviour of isotropic and die-drawn polypropylene-clay nanocomposites. Compounding, processing, characterization and mechanical properties of isotropic and die-drawn polypropylene/clay/polypropylene maleic anhydride composites
… bars produced by injection moulding. Die‑drawn oriented tensile bars were drawn to draw ratios of 2, 3, and 4. Results from the Queen’s University Belfast samples showed a reduction in tensile strength at yield, likely attributable to poor bonding associated with inadequate dispersion. The …
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Tensile and fracture behaviour of isotropic and die-drawn polypropylene-clay nanocomposites. Compounding, processing, characterization and mechanical properties of isotropic and die-drawn polypropylene/clay/polypropylene maleic anhydride composites
… by injection moulding process. Die-drawn oriented tensile bars were drawn to draw ratio of 2, 3 and 4. The results from the Queen's University Belfast samples showed a decrement in tensile strength at yield. This might be explained by poor bonding, which refers to poor dispersion. Voids …