近年来,由于石油化学工业飞速发展,裂解技术趋向于原料多样化和重质化,装置大型化,乙烯生产逐年增加,付产C_5馏分也相应增加,而且又便于集中利用。因此,C_5馏分的综合利用问题已引起国内外普遍重视。尤其是环戊烯开环聚合得到一种高度 In recent years, due to the rapid development of the petrochemical industry, the cracking technology tends to diversify and re-materialize the raw materials. Large-scale installations lead to an increase in the production of ethylene and a corresponding increase in the C_5 cut-off, which is also convenient for centralized utilization. Therefore, the comprehensive utilization of C_5 fraction has aroused widespread attention at home and abroad. In particular, cyclopentene ring-opening polymerization to obtain a high degree