Effect of Aging on Film Properties of Ethylene-Alpha Olefin Copolymers, 2002 PLACE Conference Proceedings

Film toughness of certain ethylene – alpha olefin copolymers of high impact strength, shows significant aging effects, decreasing with time. In this work we studied the time and temperature dependence of film aging of several copolymers of varying molecular structure. Film aging appears to be associated with the presence of highly branched polymer chains (>30 branches per 1000 carbon atoms). It is speculated that the thermally activated rearrangement of such branched species, over time and under film storage conditions, leads to film aging. Higher film storage temperatures lead to faster aging. It is possible to employ an “accelerated aging” testing protocol, so as to obtain longer-term aged data from a short-term test, which would be useful in an industrial production setting.

Author: H. Mavridis
Effect of Aging on Film Properties of Ethylene-Alpha Olefin
Effect of Aging on Film Properties of Ethylene-Alpha Olefin Copolymers, 2002 PLACE Conference Proceedings
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