Abstract
A model of junction network that is deformed upon drawing has been used to calculate maximum attainable draw ratios (X) and corresponding values of tensile strength (F) for different conditions of polymer film and fiber forming. Experimental data for melt-spun samples of polyethylene (PE), polycaproamide and polyoxymethylene and solution-cast films of polyvinylalcohol appeared to be in good agreement with calculated values. Considered also are methods for the increase of X and F due to polymer molecular weight enhancement in samples forming from “poor” solvent with subsequent orientation drawing under optimal conditions. Values of X=130–230 and those of F = 7 GPa with a Young's modulus E=144 and sonic modulus Es=200 GPa, approximating theoretical, have been obtained for monofilaments of PE with m.w. 2.106.
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