Lin Xiaoxue, Shi Jianjun, Niwayama Satomi
College of Chemistry and Chemical Engineering, Hainan Normal University Haikou Hainan 571158 P. R. China.
Division of Sustainable and Environmental Engineering, Graduate School of Engineering, Muroran Institute of Technology 27-1, Mizumoto-cho Muroran Hokkaido 050-8585 Japan
RSC Adv. 2023 Jan 24;13(6):3494-3504. doi: 10.1039/d2ra07779e.
Various symmetric and non-symmetric polynorbornadienes having a variety of ester groups and carboxyl groups were synthesized by ring-opening metathesis polymerization (ROMP) with Grubbs' third generation catalyst (G3 or [Ru]-III catalyst) in a controlled living manner from half-esters prepared by the selective monohydrolysis of symmetric diesters that we previously reported. The half-esters thus obtained can be directly submitted to ROMP with the G3 catalyst, leading to mostly the structure and narrow polydispersity indexes. The subsequent hydrogenation yielded saturated polymers, improving the thermostabilities according to the results. Our selective monohydrolysis reactions combined with ROMP initiated by the G3 catalyst have proven to be an efficient tool for the production of a variety of homopolymers with well-controlled structures in a living manner.
我们通过开环易位聚合（ROMP），使用格拉布第三代催化剂（G3或[Ru]-III催化剂），以可控活性方式，从我们之前报道的对称二酯的选择性单水解制备的半酯合成了具有各种酯基和羧基的各种对称和非对称聚降冰片二烯。由此获得的半酯可以直接与G3催化剂进行ROMP反应，主要得到 结构和窄的多分散指数。随后的氢化反应得到饱和聚合物，根据 结果提高了热稳定性。我们的选择性单水解反应与由G3催化剂引发的ROMP反应相结合，已被证明是一种以活性方式生产各种结构可控的均聚物的有效工具。
