PP will degrade due to heat during processing, resulting in chain scission of macromolecule, reduction in molecular weight and rise in MI.
聚丙烯在加工时受热将发生大分子断链降解,致使分子量减小,熔体指数上升。
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The results show that the abrasion process is similar to its aging by heat and oxygen. The abrasion not only resulted in the fragmentation of macromoleculechain, but also would lead to ch…