双峰乙烯/1-辛烯共聚物的制备及其性能  

Preparation and properties of bimodal ethylene/1-octene copolymer

作　　者：牟祥升 王立娟 张瑞 胡满芳 姜涛 闫冰 MU Xiangsheng;WANG Lijuan;ZHANG Rui;HU Manfang;JIANG Tao;YAN Bing(College of Chemical Engineering and Materials Science,Tianjin University of Science&Technology,Tianjin 300457,China;Daqing Chemical Research Center,PetroChina Petrochemical Research Institute,Daqing 163714,China)

机构地区：[1]天津科技大学化工与材料学院,天津300457 [2]中国石油石油化工研究院大庆化工研究中心,黑龙江大庆163714

出　　处：《石油化工》2024年第4期532-537,共6页Petrochemical Technology

基　　金：中国石油基础性前瞻性科技专项项目(2023ZZ35J);中国博士后科学基金面上项目(2022M721431);天津科技大学大学生创新创业训练计划项目(202310057078)。

摘　　要：制备了4种结构不同的茂金属催化剂,通过将两种茂金属催化剂复合的方法制备了分子量双峰分布的乙烯/1-辛烯共聚物,利用GPC,DSC,^(13)C NMR等方法分析了分子量双峰分布对共聚物性能的影响。实验结果表明,通过将茂金属催化剂M1与M4复合或M2与M3复合可成功制备出分子量双峰分布的乙烯/1-辛烯共聚物,所得双峰分布共聚物中1-辛烯富集序列很少,较低的熔体流动速率使其加工性能良好,密度、结晶态与非晶态性质接近低共聚能力催化剂所制备共聚物,具有高拉伸强度、高断裂伸长率及良好的弹性恢复性能。Four kinds of metallocene catalysts with different structures were prepared.By combining two metallocene catalysts,the ethylene/1-octene copolymer with bimodal molecular weight distribution was prepared,and the effect of bimodal molecular weight distribution on the properties of copolymers was analyzed by GPC,DSC,^(13)C NMR.Experimental results show that the ethylene/1-octene copolymer with bimodal molecular weight distribution can be successfully prepared by combining the metallocene catalyst M1 with M4 or M2 with M3.The prepared bimodal distribution copolymer has few 1-octene-enriched sequences,and the low melt flow rate results in good processing performance,which has density,crystalline state properties and amorphous state properties close to those by the catalyst with low copolymerization ability,and has high tensile strength,high elongation at break and good elastic recovery performance.

关 键 词：茂金属催化剂 高温溶液聚合 双峰聚乙烯 聚烯烃弹性体 

分 类 号：TQ334.2[化学工程—橡胶工业]