所屬欄目:聚合物科學與工程
Thelargenumberofnaturalandsyntheticpolymershasbeenclassifiedinseveralways.Thesewillbeoutlinedbelow.Theearliestdistinctionbetweentypesofpolymerswasmadelongbeforeanyconcreteknowledgeoftheirmolecularstructure.Itwasapurelyphenomenologicaldistinction,basedonth ......(本文共 8061 字 , 1 張圖) [閱讀本文] >>