窄分子量分布聚丙烯酸-g-聚甲基丙烯酸酯接枝共聚物的合成

Synthesis of Poly(acrylic acid)-g-poly(alkyl methacrylate) Graft Copolymers with Narrow Molecular Weight Distributions

利用合成的一种新型原子转移自由基聚合大分子引发剂和从主干接枝的方法制备了窄分布的两亲性接枝共聚物聚丙烯酸-g-聚甲基丙烯酸酯,并对其结构进行表征.产物主链和侧链的分子量可分别通过调整单体与引发剂的投料比和反应时间进行控制,结构规整,侧链单体适用范围广.该合成方法不仅推动了接枝共聚物合成研究的进展,其产物更为两亲性接枝共聚物自组装行为的研究提供了很好的研究对象.

Poly（acrylic acid）-g-poly（alkyl methacrylate） amphiphilic graft copolymers with narrow molecular weight distributions were synthesized by atom transfer radical polymerization （ATRP） and graft- ing-from main-chain technique. The well-defined products were characterized by FT-IR, ^1H NMR and gel permeation chromatography （GPC）. The molecular weight of a main chain could be tuned by the variation of the feed ratios, while the tuning of the molecular weights of side chains could be conducted by controlling the reaction time. This is a significant progress for the synthesis of amphiphilic graft copolymers because the side chains can be extended to other polymer blocks. Moreover, the study of self-assembly behavior can benefit formation of the well-defined structures of the products.