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采用合成的催化剂五甲基环戊二烯基三烯丙氧基钛 [Cp Ti(OAllyl) 3]与改性甲基铝氧烷 (mMAO)组成催化体系制备乙烯 /丙烯共聚物 .红外分析显示 ,乙醚可溶和己烷可溶两个级分的化学结构几乎相同 .GPC测试结果表明共聚物分子量高 ,分子量分布窄 .X 射线衍射分析 ,大多数样品的图谱为宽的弥散峰 ,表明它们是无规共聚物 ;只有当乙烯含量很高时 ,样品的谱图才有较为尖锐的结晶峰 ,结晶度不高 .经热分析(DSC、TG) ,大多数样品没有出现明显的熔点 ,只有当乙烯含量很高时才显示出熔点 ;共聚物的热稳定性较高 .DMA分析表明 ,共聚物样品中乙烯含量多的 ,其储能模量 (E′)大一些 ;共聚物的玻璃化转变温度随着丙烯链节的增多而升高 .
An ethylene / propylene copolymer was prepared by a catalytic system consisting of Cp Ti (OAllyl) 3 and modified methylalumoxane (mMAO) , Ether-soluble and hexane-soluble two fractions of the chemical structure is almost the same.GPC test results show that the copolymer molecular weight is high, narrow molecular weight distribution.X-ray diffraction analysis, the majority of the sample pattern for the broad dispersion peak, indicating that they are Random copolymer.The sharp peak and the low degree of crystallinity were observed only when the content of ethylene was high.Most samples showed no obvious melting point by thermal analysis (DSC) Ethylene showed a high melting point when the melting point; higher thermal stability of the copolymer .DMA analysis showed that copolymer samples containing more ethylene, the storage modulus (E ’) larger; copolymer glass transition The temperature increases with the increase of propylene link.