新型螺环单体的合成和自由基聚合反应的研究

新型螺环单体的合成和自由基聚合反应的研究王宏鲁剑涛冯品珍（中国科学技术大学研究生院化学部北京１０００３９）关键词自由基聚合，新单体合成，螺环单体，自由基共聚虽然离子型开环聚合早已为人熟知，但是自由基开环聚合反应的研究和应用开发还刚刚起步．...

SYNTHESIS AND FREE RADICAL POLYMERIZATION OF NEW SPIROCYCLIC MONOMER

A new type of monomer, 2 methylen 1,4 dioxo dispiro4,2,5,2] pentadecane was prepared through a series of organic reactions from simple commercial materials. This spirocyclic monomer could undergo free radical ring opening polymerization at 120 ℃ with BPO as initiator. The driving force for ring opening was the relief of the strain at the central spiro atom as well as the formation of stable carbonyl group. However, it copolymerized with MMA at the same condition without any ring opening. The structures of the monomer, resulting polymer and copolymer were determined by IR, NMR and MS. Molecular weight and its distribution of the polymers were estimated by GPC.