Synthesis of Block Copolymer Particles by One-Pot, Two-Step Dispersion Reversible Chain Transfer Catalyzed Polymerization (Dispersion RTCP) in Supercritical Carbon Dioxide,Industrial & Engineering Chemistry Research

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Synthesis of Block Copolymer Particles by One-Pot, Two-Step Dispersion Reversible Chain Transfer Catalyzed Polymerization (Dispersion RTCP) in Supercritical Carbon Dioxide
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-05-22 , DOI: 10.1021/acs.iecr.9b01529
Masayoshi Okubo ₁ , Yukiya Kitayama ₂ , Tomoya Taniyama ₂ , Hideto Minami ₂ , Xiang Liu ₁ , Chujuan Huang ₃

Affiliation

Direct synthesis of micrometer-sized, poly(methyl methacrylate)-block-polystyrene (PMMA-b-PS) particles by one-pot, two-step dispersion reversible chain transfer catalyzed polymerization (dispersion RTCP) with nitrogen catalyst was successfully demonstrated in supercritical carbon dioxide (scCO₂). The molecular weight distribution was clearly shifted to higher molecular weight side compared to that of PMMA-I prepared in the first step, indicating the successful synthesis of the block copolymer. This was supported by thin-layer chromatographic result. The blocking efficiency, which was obtained from the two number-distribution curves of molecular weight measured from gel permeation chromatography with dual detectors (refractive index and ultraviolet), was 87%.

中文翻译：

一锅两步分散可逆链转移催化聚合（分散RTCP）在超临界二氧化碳中的合成嵌段共聚物颗粒

在超临界条件下成功地证明了通过一锅两步分散可逆链转移催化聚合（分散RTCP）直接合成微米级的聚（甲基丙烯酸甲酯）-嵌段-聚苯乙烯（PMMA- b- PS）颗粒二氧化碳（scCO ₂）。与第一步制备的PMMA-1相比，分子量分布明显转移到了较高的分子量侧，表明成功地合成了嵌段共聚物。薄层色谱结果证明了这一点。由使用双检测器的凝胶渗透色谱法测得的分子量的两个数分布曲线（折射率和紫外线）获得的阻断效率为87％。

更新日期：2019-11-18

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