2-苯基-4-亚甲基-1,3-二氧环戊烷与受电子单体的自动共聚反应

<正> 在极性相反的单体对中,有些无需加自由基引发剂,就能进行所谓自动共聚合反应.带乙烯基的螺环原酸酯、碳酸酯和环缩醛或酮等是给电子单体,可能与接受电子的单体,如马来酸酐(Manh)进行自动共聚反应.至今,这方面研究工作报道甚少。 我们合成的2-苯基-4-亚甲基-1,3-二氧环戊烷(PMDO)能进行自由基开环聚合反应.本文研究它与受电子单体,如Manh、丙烯腈(AN)和甲基丙烯酸甲酯(MMA)的自动共聚反应.

SPONTANEOUS COPOLYMERIZATION OF 2-PHENYL-4-METHYLENE-l,3-DIOXOLANE WITH ELECTRON-DEFICIENT VINYL MONOMERS

2-Phenyl-4-methylene-l,3-dioxolane (PMDO) as an electron donor can spontaneously co-polymerized with maleic anhydride (Manh), methyl methacrylate (MMA) and acrylonitrile (AN) as the electron acceptors. The order of their polymerization activity and alternating-copolymerization tendency are: Manh>AN>MMA, which are the same as decreasing order of e values of the monomers. The formation of CT complexes PMDO-Manh and PMDO-AN was ascertained by UV and NMR spectroscopies. It was also discussed that the different protons of the same electron acceptor in the CT complexes have different chemical shifts.