作　　者： ; ; ; (李洁球）;

机构地区： 中山大学化学与化学工程学院高分子研究所

出　　处： 《中山大学学报（自然科学版）》 1996年第S2期33-38,共6页

摘　　要： 采用新型高活性钛系催化剂，调节催化剂中锌化合物含量和相关的聚合方法，可有效地按需要控制超高分子量聚乙烯（ＵＭＷＰＥ）的分子量和制得颗粒形态良好的产物．催化剂组份中ＺｎＣｌ２／钛化物（摩尔比）＝０．１～１０之间选择，ＵＭＷＰＥ的分子量Ｍｗ可在６０×１０４～６１０×１０４范围调控；并保持３５０～８１０ｋｇ（ＰＥ）／ｇ（Ｔｉ）的高活性．制得了２０～２００目颗粒≥９８％重量的良好产品．对制得ＵＭＷＰＥ产品的ＤＳＣ、Ｘ－射线衍射测定表明具有良好的结晶性，结晶度为６８％～７２．４％，熔点为１３４～１３８℃；缺口冲击强度为１７６．４～１９２． The prepare of UMWPE with molecular weight of PE controllable has been studied in the presence of TiCl 4/MgCl 2/ZnCl 2/SiCl 4/alcohol/AlR 3 highly active catalyst which was prepared by comolling-reaction procedure. When mole ratio of ZnCl 2/Ti equaled 0 1 to 10, highly active catalyst gave a catalytic efficiency of 350～810kg(PE)/g(Ti), resulting of UMWPE with molecular weight w ranging from 60 to 610×10 4 as well as weight distribution of PE ≥98% from 20 to 200 mesh. The products of UMWPE were characterized by DSC and X-ray pattern to be high density PE with crystallinity of 68% to 72.4% and T m 134 to 138℃. The UMWPE spciments with various molecular weights exhibited very high impact strength with 176 4～192 1 kJ/m 2.

关 键 词： 超高分子量聚乙烯 高活性催化剂 乙烯聚合 工程塑料

领　　域： [理学] [理学]