Lithium-Assisted Copolymerization of CO2/Cyclohexene Oxide: A Novel and Straightforward Route to Polycarbonates and Related Block Copolymers,Macromolecules

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Lithium-Assisted Copolymerization of CO2/Cyclohexene Oxide: A Novel and Straightforward Route to Polycarbonates and Related Block Copolymers
Macromolecules ( IF 5.1 ) Pub Date : 2016-03-23 00:00:00 , DOI: 10.1021/acs.macromol.6b00203
Dongyue Zhang ₁ , Hefeng Zhang ₁ , Nikos Hadjichristidis ₁ , Yves Gnanou ₁ , Xiaoshuang Feng ₁

Affiliation

A facile route toward alternating polycarbonates by anionic copolymerization of carbon dioxide (CO₂) and cyclohexene oxide (CHO), using lithium halide or alkoxide as initiators and triisobutylaluminum (TiBA) as activator, is reported. α,ω-Heterobifunctional and α,ω-dihydroxypoly(cyclohexene carbonate)s (PCHC) as well as poly(CHC-co-CHO) copolymers with different carbonate composition could also be easily synthesized by adjusting the amount of TiBA or by adding inert lithium salts. The value of this initiating system also resides in the easy access to PSt-b-PCHC (PSt: polystyrene) and PI-b-PCHC (PI: polyisoprene) block copolymers which can be derived by mere one-pot sequential addition of styrene or dienes first and then of CO₂ and CHO under the same experimental conditions.

中文翻译：

锂辅助的CO ₂ /环己烯氧化物的共聚合：一种新颖且直接的合成聚碳酸酯及相关嵌段共聚物的途径

据报道，通过使用卤化锂或醇盐作为引发剂和三异丁基铝（TiBA）作为活化剂，通过二氧化碳（CO ₂）和环己烯氧化物（CHO）的阴离子共聚，实现交替生成聚碳酸酯的简便途径。也可以通过调节TiBA的量或添加惰性物质来轻松合成具有不同碳酸盐组成的α，ω-异双功能和α，ω-二羟基聚碳酸环己酯（PCHC）以及聚（CHC- co- CHO ）共聚物锂盐。该引发体系的价值还在于易于获得PSt- b- PCHC（PSt：聚苯乙烯）和PI- b- PCHC（PI：聚异戊二烯）嵌段共聚物，它们可以通过仅一锅顺序添加苯乙烯或首先是二烯，然后是二烯_2，与CHO在相同的实验条件下。

更新日期：2016-03-23

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