Abstract
A previous molecular model for tensile deformation of polymers is extended to include the effect of temperature on the development of orientation during drawing of flexible polymers that are chacterized by weak intersegmental interactions, such as polyethylene. The results obtained confirm the experimentally observed existence of a maximum drawing temperature above which the efficiency of the orientation process decreases, presumably due to disentangling and recoiling of the polymer chains. This maximum temperature is predicted to increase linearly with (the logarithm of) the weight-average molecular weight. Polydispersity was found to significantly decrease the efficiency of drawing at high temperatures
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