We investigate a series of propylene-ethylene copolymers (where the ethylene content is &lt; 20 wt%) under deformation at a variety of temperatures. The insertion of ethylene during the polymerization produces a final product which is elastomeric in nature. We investigate the strain-induced crystallization of these materials as they are deformed and relate this to the crystal structure and morphology.<br/><br/>Specifically we tailor the sequence distribution of the polymers (how the ethylene is inserted), and the stereo- and region-defects in the propylene sequences. In addition we explore the effects of molecular weight from 100,000 to over 1,000,000 g/mol. We will show, via SAXS/WAXS/DSC that there are differences in polymer crystal morphology and differences in strain-induced crystallization for such materials.

Strain-induced crystallization in elastomers of propylene-ethylene copolymers

251st National Meeting (2016)

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