共聚物
化学
三合会(社会学)
己内酯
取代基
聚合
反应性(心理学)
高分子化学
丙交酯
开环聚合
立体专一性
催化作用
立体化学
有机化学
聚合物
医学
病理
心理学
替代医学
精神分析
作者
Nobuyoshi Nomura,Azusa Akita,Ryohei Ishii,Masami Mizuno
摘要
The bulky substituents of homosalen complexes decelerate the ring-opening polymerization of racemic lactide (LA). The substituent effects provide the first catalysis for the random copolymerization of epsilon-caprolactone (CL) with LA (CL/LA = 1:1). The copolymerization of CL with LA (CL/LA = 1:1) by the iPr(3)Si-substituted homosalen-Al complex 2 affords the practically random copolymer in a controlled manner. The reactivity ratios, average sequence lengths of CL and LA during the copolymerization, abundance ratios of the triad caproyl sequences, and T(g) value of the obtained copolymer indicate that the copolymer was random with a somewhat alternative tendency (r(CL)r(LA) = 0.80).
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