Preparation of block copolymer particles by two-step, reversible chain transfer catalyzed polymerization (RTCP) with nitrogen catalyst in miniemulsion systems
Preparation of block copolymer particles by two-step, reversible chain transfer catalyzed polymerization (RTCP) with nitrogen catalyst in miniemulsion systems
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DOI：
10.1039/c2py20120h
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发表时间：
2012-01-01
影响因子：
4.6
通讯作者：
Okubo, Masayoshi
中科院分区：
文献类型：
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作者：
Kitayama, Yukiya;Yorizane, Mika;Okubo, Masayoshi
我们证明了在70 ℃下，以N-碘代琥珀酰亚胺为催化剂，通过两步可逆链转移催化聚合（RTCP）在水介质中成功制备聚甲基丙烯酸甲酯（PMMA）-b-聚甲基丙烯酸苄酯（PBzMA）颗粒。聚合反应顺利进行，数均分子量（M-n）随转化率线性增加，与理论分子量（M-n，M-th）一致。每次转化时的分子量分布较窄（多分散指数约为1.4）。约88%的PMMA链在64%的转化率下变成PMMA-b-PBzMA，这是一个相对较高的值。
We demonstrated a successful preparation of poly(methyl methacrylate) (PMMA)-b-poly(benzyl methacrylate) (PBzMA) particles in aqueous media by two-step reversible chain transfer catalyzed polymerization (RTCP) with N-iodosuccinimide as a catalyst at 70 degrees C. The polymerization smoothly proceeded, and the number-average molecular weight (M-n) increased linearly with conversion, which agreed with the theoretical molecular weight (M-n,M-th). The molecular weight distribution at each conversion was narrow (polydispersity index approximate to 1.4). Approximately 88% PMMA chains became PMMA-b-PBzMA at 64% conversion, which was a relatively high value.