Polystyrene‐block‐polylactide obtained by the combination of atom transfer radical polymerization and ring‐opening polymerization with a commercial dual initiator
Polystyrene‐block‐polylactide obtained by the combination of atom transfer radical polymerization and ring‐opening polymerization with a commercial dual initiator
复制标题
DOI：
10.1002/app.34101
复制
发表时间：
2011-12
影响因子：
3
通讯作者：
Mohammed Dirany;P. Lacroix-Desmazes;M. Vayer;R. Erre;B. Boutevin;C. Sinturel
中科院分区：
文献类型：
--
作者：
Mohammed Dirany;P. Lacroix-Desmazes;M. Vayer;R. Erre;B. Boutevin;C. Sinturel
采用原子转移自由基聚合和开环聚合相结合，并以市售 2,2,2-三溴乙醇作为双引发剂，通过连续两步程序制备聚苯乙烯（PS）-b-聚丙交酯（PLA）嵌段共聚物。首先制备了不同分子量的端羟基聚苯乙烯（PS-OH），其多分散指数低于1.3；这些为D,L-丙交酯的聚合提供了有价值的大分子引发剂。然后获得具有允许在PS基质中形成六方堆积PLA圆柱体的组成的嵌段共聚物。 PS-b-PLA 薄膜在蒸气溶剂退火后显示出 PLA 圆柱体的六边形堆积组织，其方向垂直于薄膜表面。 © 2011 Wiley periodicals, Inc. J Appl Polym Sci，2011
A polystyrene (PS)-b-polylactide (PLA) block copolymer was prepared from the combination of atom transfer radical polymerization and ring-opening polymerization with commercially available 2,2,2-tribromoethanol as a dual initiator in a sequential two-step procedure. Hydroxyl-terminated polystyrene (PS-OH)s with various molecular weights were first prepared with polydispersity indices lower than 1.3; these provided valuable macroinitiators for the polymerization of D,L-lactide. A block copolymer with a composition allowing the formation of hexagonally packed PLA cylinders in a PS matrix was then obtained. The PS-b-PLA thin films revealed, after vapor solvent annealing, a hexagonally packed organization of the PLA cylinders, which was oriented perpendicularly to the surface of the film. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011