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首页> 外文期刊>ACS Macro Letters >One-Pot Synthesis of Block Copolymers by Orthogonal Ring-Opening Polymerization and PET-RAFT Polymerization at Ambient Temperature
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One-Pot Synthesis of Block Copolymers by Orthogonal Ring-Opening Polymerization and PET-RAFT Polymerization at Ambient Temperature

机译：常温下正交开环聚合和PET-RAFT聚合一锅法合成嵌段共聚物

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摘要

Well-defined poly(e-caprolactone)-b-poly(methyl acrylate) (PCL-b-PMA) block copolymers were synthesized at ambient temperature by one-pot combination of diphenyl phosphate (DPP)-catalyzed ring-opening polymerization (ROP) and photoinduced electron/energy transfer reversible addition fragmentation chain transfer (PET-RAFT) polymerization. Full orthogonality of PET-RAFT polymerization and DPP-catalyzed ROP was confirmed by kinetic studies, which allowed facile synthesis of PCL-b-PMA block copolymers without a specific polymerization sequence. The resulting PCL-b-PMA block copolymers synthesized by either sequential or simultaneous ROP and PET-RAFT polymerization showed remarkably low molecular weight distributions (<= 1.15), indicating that both ROP and PET-RAFT polymerizations proceeded in a controlled manner. In contrast to previous synthetic methods to prepare block copolymers, this facile one-pot method allows for rapid synthesis of block copolymers controlled via visible light.
机译：在室温下，通过磷酸二苯酯（DPP）催化开环聚合（ROP）的一锅法合成了定义明确的聚（e-己内酯）-b-聚（丙烯酸甲酯）（PCL-b-PMA）嵌段共聚物）和光诱导的电子/能量转移可逆加成断裂链转移（PET-RAFT）聚合。动力学研究证实了PET-RAFT聚合和DPP催化的ROP完全正交，这使得无需特定的聚合顺序即可轻松合成PCL-b-PMA嵌段共聚物。通过顺序或同时进行ROP和PET-RAFT聚合合成的所得PCL-b-PMA嵌段共聚物显示出非常低的分子量分布（<= 1.15），表明ROP和PET-RAFT聚合均以受控方式进行。与以前的制备嵌段共聚物的合成方法相反，这种简便的一锅法可以通过可见光快速合成嵌段共聚物。

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