Kametani Yuki, Ouchi Makoto
Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan.
ACS Polym Au. 2021 Jun 29;1(1):10-15. doi: 10.1021/acspolymersau.1c00012. eCollection 2021 Aug 11.
A series of methacrylate/styrene alternating copolymers were efficiently and systematically synthesized via alternating copolymerization of saccharin methacrylamide () with styrene and subsequent one-pot alcoholysis transformation with alcohols. The saccharin amide bond in was stable enough that was used as a bench-stable monomer, but the bond became reactive toward alcohols after the copolymerization. Thanks to the specific feature, the postpolymerization modification could be performed under mild conditions despite easy handling of the monomer. The quantitative transformation as well as the alternating sequence were certainly supported by H NMR and MALDI-TOF-MS analyses. The alternating copolymers carrying relatively short alkyl pendants expressed lower glass transition temperatures than those of the statistical counterparts. Moreover, the alternating copolymerization was controlled via a RAFT polymerization system, affording a unique block copolymer composed of alternating copolymer segments.
通过糖精甲基丙烯酰胺（）与苯乙烯的交替共聚反应以及随后与醇类进行的一锅法醇解转化，高效且系统地合成了一系列甲基丙烯酸酯/苯乙烯交替共聚物。中的糖精酰胺键足够稳定，以至于被用作易于储存的单体，但在共聚反应后该键对醇类变得具有反应活性。由于这一特殊性质，尽管单体易于处理，但后聚合改性仍可在温和条件下进行。核磁共振氢谱（H NMR）和基质辅助激光解吸电离飞行时间质谱（MALDI-TOF-MS）分析确实证实了定量转化以及交替序列。带有相对短烷基侧链的交替共聚物表现出比统计共聚物更低的玻璃化转变温度。此外，通过可逆加成-断裂链转移（RAFT）聚合体系控制交替共聚反应，得到了一种由交替共聚物链段组成的独特嵌段共聚物。
