新型钒系催化剂用于乙丙橡胶的合成及特征（英文）

Synthesis and characterization of ethylene-propylene rubber with novel vanadium catalyst system

通过三辛基铝与乙酰丙酮钒进行烷基化反应,制备出己烷可溶的新型钒系催化剂,探讨了其催化乙烯聚合及与丙烯共聚合的性能,并通过核磁共振波谱及凝胶渗透色谱考察了所制备聚合物的组成和分子量及其分布。结果表明,新型钒系催化剂催化乙烯聚合时的活性远高于三氯氧钒催化剂,催化乙烯与丙烯共聚合时的活性与三氯氧钒催化剂相当,并且用新型钒系催化剂所制备乙丙橡胶的丙烯插入率和分子量及其分布与三氯氧钒催化剂制备者几乎相同,表明所制备新型钒系催化剂有望取代三氯氧钒催化剂用于乙丙橡胶生产中。

Catalyst systems based on VOCl 3/alumimum sesquiethyl chloride(EASC),are known for efficient production of high molecular weight ethylene-propylene rubber(EPR)with narrow polydispersity index in industry[1].However,the main disadvantage of this catalyst system is extremely sensitive to air and moisture,resulting in environment pollution,corrosion equipment and instability.Thus,it has great value to prepare a novel high performance catalyst system for EPR production.