基于主链的PPEGMEMA- b -PBTFVPP- b -PPEGMEMA基于全氟环丁基芳基醚的两亲ABA三嵌段共聚物:合成与自组装
摘要:
一系列基于全氟环丁基丁基芳基醚的两亲ABA三嵌段共聚物,由亲水性聚[聚(乙二醇)甲基丙烯酸甲酯](PPEGMEMA)和疏水性聚(2,2'-双(4-三氟乙烯基-氧苯基)丙烷)(PBTFVPP)组成)区块是通过网站转换策略合成的。首先通过BTFVPP三氟乙烯基芳基醚单体的热逐步增长环加成聚合反应制备半氟化PBTFVPP段,然后将其末端官能化,转化为在每个末端带有一个ATRP起始基团的Br-PBTFVBP-Br大分子引发剂。具有相对窄分子量分布的目标PPEGMEMA- b -PBTFVPP- b -PPEGMEMA三嵌段共聚物(M w/中号Ñ ≤1.32)的合成通过ATRP被Br-PBTFVBP -溴大分子引发剂引发PEGMEMA大分子单体。使用荧光探针技术确定水溶液中获得的两亲共聚物的临界胶束浓度(cmc)。通过透射电子显微镜研究了由共聚物形成的胶束的形态。结果表明,这种三嵌段共聚物可以在不同
A new class of methacrylate monomers containing perfluorocyclobutyl unit was synthesized in multisteps including crossing-dimerization, demethylation and esterification using commercially available p-substituted phenol, tetrafluoroethylene and methacryloyl chloride as starting materials. These monomers can be polymerized in solution to provide perfluorocyclobutyl-based polymethacrylate, a kind of potential transparent material. (C) 2009 Elsevier B.V. All rights reserved.