Ziegler-Natta/茂金属催化剂制备超高分子量聚α-烯烃的研究  

Investigation of the preparation of ultra high molecular weight poly-α-alkene by ziegler-natta/metallocene catalyst

作　　者：殷德刚[1] 赵梦奇[1] 吐尼莎古丽.阿吾提 石伟[1] 姚美芹[1] 司马义.努尔拉 

机构地区：[1]新疆大学化学化工学院材料实验室,乌鲁木齐830046

出　　处：《四川大学学报（自然科学版）》2012年第6期1325-1330,共6页Journal of Sichuan University(Natural Science Edition)

基　　金：新疆维吾尔自治区高技术开发项目(200416117)

摘　　要：以传统的Ziegler-Natta（Z-N）／茂金属（Cp2ZrCl2）催化剂为主催化剂，以三乙基铝（C2H5）3Al]为助催化荆，采用本体聚合法合成了具有超高分子量的烯烃类聚合物．采用正交试验的方法获得了最佳的催化剂配比条件（A为0．02g、B为0．03g、C为0．15mL）．凝胶渗透色谱测得在该条件下所合成聚合物的Mw为1．12×10^7，M。为2．96×10^5，多分散系数Mw／Mm为3．79．以旋转粘度计测得该条件下聚合物溶液的表观粘度为27mPa·s．实验证明，通过采Ziegler—Natta（Z—N）／茂金属（Cp2ZrCl2）为主催化剂进行烯烃聚合不仅能提高聚合物的分子量，而且还能增大其分子量分布．Ultra high molecular weigh α-alkene-derivatived polymers were synthesized by bulk polymeri- zation with the combination of Ziegler-Natta （Z-N） and Metallocene （Cp2ZrCl2） as the primarily catalyst and the aluminium triethyl [（C2 H5）3 Al] as the cocatalyst. The optimum catalysts＇ composition ratio （A. 0.02 g, ]5. 0.03 g, C. 0.2 mL）was obtained by the orthogonal experiment method. Gel permeation chromatograph （GPC） test shows that the resulted polymers achieved the weight-average molecular weights of 1.12 × 10^7 and with the polydispersity of 3.79 when employing this optimum catalysts＇ com- position ratio. The apparent viscosity of the polymer in hexane reached 27 mPa · s as measured by the revolving viscosity apparatus. The results of our experiment showed that not only the molecular weight but also the distribution of molecular weight of α-alkene-derivatived polymers were enhanced when cata- lyzed by such combining catalysts.

关 键 词：Z—N催化剂 二氯二茂锆 Α-烯烃 超高分子量 分子量分布 

分 类 号：O632.12[理学—高分子化学]