摘要
以丙烯为原料,CS-Ⅰ为主催化剂,三乙基铝为助催化剂,分别以环己基甲基二甲氧基硅烷（Donor-C）、二环戊基二甲氧基硅烷（Donor-D）及二者混合物或烷氧基硅烷（SED 2530）为外给电子体,在反应温度为70℃,反应压力为4.0 MPa,物料平均停留时间为1.1 ～1.5 h的条件下,制备了聚丙烯（PP）粉料;将其与抗氧剂1010、抗氧剂168及硬脂酸钙混合造粒,制备出了PP树脂.结果表明,由SED 2530制备的PP树脂熔体流动速率、等规度、热变形温度和结晶温度依次为4.099 g/min,99.5％,118.3℃,123.3℃;此外,其弯曲应力为1 826MPa,拉伸屈服强度为38.1 MPa,均高于由其他几种外给电子体制备者,表明以SED 2530为外给电子体的催化体系具有良好的氢调敏感性及更好的刚韧平衡性.
Polypropylene （PP） powder was prepared with propylene as raw materiaI,CS -I as main catalyst, triethylalu- minum as coeatalyst and using cyclohexyl methyl dimethoxysi- lane （ Donor - C）, dieyelopentyl dimethoxysilane （ Donor - D ） and their mixture or alkoxy silane（ SED 2530）as external electron donor respectively at temperature 70 ℃,pressure 4.0 MPa and average residence time 1.1 - 1.5 h. And PP resin was prepared by mixing granulation of PP powder, antioxidant 1010, antioxidant 168 and calcium stearate. The resuhs showed that the melt flow rate,isotaetieity, heat distortion temperature and crystallization temperature of PP resin prepared with SED 2530 were 4.099 g/min,99.5% , 118.3 ℃ , 123.3℃ respectively, and the bending modulus and the tensile yield strength of the resin were 1 826 MPa, 38.1 MPa separately, higher than those with the other external donors, indicating that the catalyst system with SED 2530 as external donor bad good hydrogen response and rigid- tough balance.
出处
《石化技术与应用》
CAS
2014年第6期402-404,共3页
Petrochemical Technology & Application
基金
中国石油天然气股份有限公司资助项目(项目编号:2011 B-2703-0103)
关键词
丙烯
外给电子体
聚合
等规度
物理机械性能
热变形温度
propylene
external electron donor
polymerization
isotacticity
physical and mechanical property
heat distortion temperature
