Biodegradable Multiblock Poly[<i>N</i>-(2-hydroxypropyl)methacrylamide] via Reversible Addition−Fragmentation Chain Transfer Polymerization and Click Chemistry
作者:Kui Luo、Jiyuan Yang、Pavla Kopečková、Jindřich Kopeček
DOI:10.1021/ma102574e
日期:2011.4.26
was designed, synthesized, and used for direct synthesis of clickable telechelic polymers. Good control of reversible addition−fragmentation chain transfer (RAFT) polymerization of N-(2-hydroxypropyl)methacrylamide (HPMA) was achieved by using the new CTA, as indicated by a linear increase of number-average molecular weight (Mn) with conversion and low polydispersity (PDI) (<1.1). In particular, enzymatically
设计、合成了一种含有炔端基的新型双功能链转移剂 (CTA),并将其用于可点击遥爪聚合物的直接合成。使用新的 CTA 实现了对N -(2-羟丙基)甲基丙烯酰胺(HPMA)的可逆加成-断裂链转移(RAFT)聚合的良好控制,如数均分子量(M n)的线性增加所示转化率和低多分散性 (PDI) (<1.1)。特别是,酶促降解的多嵌段 HPMA 聚合物很容易通过 Cu I与 α,ω-二叠氮基-寡肽 (GFLG) 序列的后续反应来制备-催化炔烃-叠氮化物环加成反应。当多嵌段聚HPMA 的高分子量部分暴露于木瓜蛋白酶或组织蛋白酶B 时,聚合物被降解成与最初遥爪聚HPMA 相似的分子量和窄多分散性的链段。