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Amphiphilic triblock copolymers containing polypropylene as the middle block.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-08-25 , DOI: 10.1002/anie.202009165
Tianwei Yan 1 , Damien Guironnet 1
Affiliation  

The synthesis of stereoregular telechelic polypropylene (PP) and their use to access triblock amphiphilic copolymers with the PP block located in the center is described. The strategy consists of selectively copolymerizing propylene and a di‐functional co‐monomer (1,3‐diisopropenylbenzene) to yield a α,ω‐substituted polypropylene. Initiation of the copolymerization favors insertion of DIB over propylene; propagation steps favor insertion of propylene. Termination via a chain‐transfer reaction yields the terminal unsaturation of the polymer. The telechelic polypropylene is then converted into α,ω‐hydroxyl‐terminated polypropylene and used as a macroinitiator for the synthesis of triblock copolymers. Water‐soluble amphiphilic triblock polymers are also synthesized. The use of catalytic reactions simultaneously provides the stereocontrol of the polypropylene and high productivity (multiple chains of block copolymer per metal center).

中文翻译:

含有聚丙烯作为中间嵌段的两亲三嵌段共聚物。

描述了立构规整的远螯聚丙烯(PP)的合成及其在中心位于PP嵌段的三嵌段两亲共聚物中的应用。该策略包括选择性地使丙烯与双官能共聚单体(1,3-二异丙烯基苯)共聚,生成α,ω-取代的聚丙烯。共聚反应的开始有利于插入DIB,而不是插入丙烯。传播步骤有利于丙烯的插入。通过链转移反应终止可产生聚合物的末端不饱和键。然后将远螯聚丙烯转化为α,ω-羟基封端的聚丙烯,并用作合成三嵌段共聚物的大分子引发剂。还可以合成水溶性两亲三嵌段聚合物。
更新日期:2020-08-25
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