有机/无机复合载体负载复合催化剂生产聚乙烯共混物的共混性质  

Blending properties of polyethylene blends obtained by hybrid catalyst on composite support

作　　者：周琦[1] 历伟[2,3] 史玉立[1] 蒋斌波[3] 王靖岱[3] 阳永荣[3] 

机构地区：[1]宁波工程学院化学工程分院,浙江宁波315016 [2]宁波大学材料科学与化学工程学院,浙江宁波315211 [3]浙江大学化学工程与生物工程学系,浙江杭州310027

出　　处：《化工学报》2012年第6期1735-1741,共7页CIESC Journal

基　　金：浙江省教育厅科研项目(Y201016068);国家自然科学基金项目(20676114;20490205);国家高技术研究发展计划项目(2007AA030208)~~

摘　　要：引言聚乙烯共混物通常由不同分子量、不同支化度的两种聚乙烯级分＂掺混＂形成,广泛应用于改善聚乙烯产品的加工和使用性能[1-2]。聚乙烯共混物的熔融态和固态混合是否均一,是提高产品加工和使用性能的关键因素之一[3]。获得聚乙烯共混物的主要方法为机械共混法和反应共混法,Hybrid catalyst was devised based on the phase inversion method.The catalyst was as follows：PSA was the organic part for binding（n-BuCp）2ZrCl2,and SiO2/MgCl2 was the inorganic part to support TiCl3.As an alternative to a tandem or cascade type process,a two-step polymerization method was carried out in a single reactor on laboratory scale.Utilizing this two-step slurry polymerization process,polyethylene blends of ultra high molecular weight copolymer and low molecular weight homo-polymer were produced.Different fractions of polymer blends were obtained according to the polymerization time in each stage.The miscibility and thermal behavior of the blends were investigated by different scanning calorimetry（DSC）techniques and rheology methods.Finally,the miscibilities of the blends obtained by this method were compared with the blends obtained by traditional mechanical blending.

关 键 词：复合催化剂 共混性 超高分子量聚乙烯 复合载体 聚乙烯共混物 

分 类 号：TQ050.4[化学工程]