聚醋酸乙烯酯PVAc O-C—CH Polyvinyl acetate c2-c+ H 聚乙烯基甲基醚PVME O-CH3 CH-C Polyvinyl methyl ether H 聚丁二烯PBcH2 CH=CH--CH3 Polybutadiene 聚异戊二烯PIP + CH2(--CH--CH3+ Polyisoprene CH3聚醋酸乙烯酯 PVAc Polyvinyl acetate 聚乙烯基甲基醚 PVME Polyvinyl methyl ether CH2 C C n H O O CH3 聚丁二烯 PB Polybutadiene 聚异戊二烯 PIP Polyisoprene CH2 C n H O CH3 CH2 CH CH CH3 n CH2 C CH CH3 n CH3