知識(shí)貝殼
知識(shí)貝殼
所屬欄目：聚合物科學(xué)與工程
TheGlassTransitionIthaslongbeenknownthatamorphouspolymerscanexhibittwodistinctlydifferenttypesofmechanicalbehavior.Some,likepolymethylmethacrylate(Lucite,Plexiglas)andpolystyrene,arehard,rigid,glassyplasticsatroomtemperature,whileothers,forexample,polybut ......（本文共 10594 字 ） [閱讀本文] >>