Abstract Recyclable polymers, such as poly(γ-butyrolactone) (PGBL), offer a great opportunity to address the environmental issues of plastics. Herein, we presented an alternative commercial powerful organomagnesium catalysis for ring-opening polymerizations of 3,4-trans six-membered ring-fused γ-butyrolactone (M), enantiomer (R)-M and (S)-M with high conversions (up to 89%). Di-n-butylmagnesium and n-butylethylmagnesium exhibited effective activities for all three kinds of monomers. The polymerization process of (R)-M was systematically investigated with di-n-butylmagnesium as the catalyst. Well-defined polyesters with molecular weights ranging from 4780 to 17420 g/mol were obtained. The commercial organomagnesium catalysis would broaden the applications of recyclable polymers.

中文翻译：

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有机镁有效合成可回收聚合物

摘要 可回收聚合物，如聚（γ-丁内酯）（PGBL），为解决塑料的环境问题提供了很好的机会。在此，我们提出了一种用于 3,4-反式六元稠环 γ-丁内酯 (M)、对映异构体 (R)-M 和 (S)-M 开环聚合的替代商业强有机镁催化剂，具有高转化率（高达 89%）。二正丁基镁和正丁基乙基镁对三种单体均表现出有效的活性。以二正丁基镁为催化剂系统研究了(R)-M的聚合过程。获得了分子量范围为 4780 至 17420 g/mol 的明确定义的聚酯。商业有机镁催化将拓宽可回收聚合物的应用。