权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Synthesis of well-defined multi-block copolymers by means of solid phase synthetic method using telechelic polymers

使用遥爪聚合物固相合成法合成明确的多嵌段共聚物

基本信息

批准号：
03805085
负责人：
HIRAO Akira
金额：
$ 1.15万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

We have developed new methodology for synthesizing telechelic polymers with hydroxy, amino, carboxy, mercapto, and 1,3- butadienyl groups. The methodology involves the reaction of anionic living polymers from styrene, 1,3-butadiene, and isoprene with haloalkyl compounds with protected functional groups. The resulting polymers all were observed to possess controlled molecular weights and narrow molecular weight distributions. More importantly, the degrees of functional groups are quantitatively introduced by the above reactions. The analyses of end functional groups were successfully performed by NMR, IR, UV, and the newly developed TLC-FID methods. These functional groups could be transformed into more reactive acid anhydride, acid chloride, and chloroformate moieties. Similarly, the synthesis of telechelic polymers using cationic living polymers are under investigation at the present time.In order to make multi-block copolymers with well-defined structures, a model reaction between aminated polystyrene and carboxylated polyisoprene was carried out. The reaction was found to proceed quantitatively to produce the corresponding block copolymer. The similar reactions on polystyrene gel have been carried out followed by elimination from the gel to afford the block copolymers in high yields more than 90%. The well-defined multi-block copolymers are now attempted to synthesize by sequential addition of different telechelic polymers on polystyrene gel.

我们已经开发了新的方法来合成遥爪聚合物与羟基，氨基，羧基，巯基，和1，3-丁二烯基团。该方法涉及苯乙烯，1，3-丁二烯和异戊二烯的阴离子活性聚合物与具有保护官能团的卤代烷基化合物的反应。观察到所得聚合物均具有受控的分子量和窄的分子量分布。更重要的是，通过上述反应定量地引入了官能团的度。采用NMR、IR、UV和新开发的TLC-FID方法成功地进行了末端官能团的分析。这些官能团可以转化为更具反应性的酸酐、酰氯和氯甲酸酯部分。为了得到结构明确的多嵌段共聚物，我们采用了胺化聚苯乙烯和羧基化聚异戊二烯之间的模型反应。发现该反应定量地进行以产生相应的嵌段共聚物。在聚苯乙烯凝胶上进行类似的反应，然后从凝胶中消除，以90%以上的高产率得到嵌段共聚物。本文尝试通过在聚苯乙烯凝胶上顺序加成不同的遥爪聚合物来合成结构明确的多嵌段共聚物。