-
公开(公告)号:US5270400A
公开(公告)日:1993-12-14
申请号:US816433
申请日:1991-12-31
申请人: Maria Spinu
发明人: Maria Spinu
IPC分类号: C08G63/08 , C08G63/664
CPC分类号: C08G63/664 , C08G63/08
摘要: Linear block copolymers are disclosed. The polymers comprise a plurality of alternating polymeric blocks of amorphous copolymers of L-lactide and D-lactide with semicrystalline blocks of either L-lactide homopolymer or D-lactide homopolymer. The molecular weight can be built up by either of two techniques. The first technique is to use a chain extending agent such as a diacyl chloride or a diisocyanate to link a plurality of the preformed block copolymers. The second technique is to polymerize additional alternating amorphous and semicrystalline onto the original alternating block copolymers.
摘要翻译: 公开了线性嵌段共聚物。 聚合物包含多个交替的L-丙交酯和D-丙交酯与L-丙交酯均聚物或D-丙交酯均聚物的半结晶嵌段的无定形共聚物的聚合物嵌段。 分子量可以通过两种技术之一来构建。 第一种技术是使用双链酰氯或二异氰酸酯等增链剂连接多个预制嵌段共聚物。 第二种技术是将另外的交替的无定形和半结晶聚合到原始的交替嵌段共聚物上。