复合载体负载型催化剂制备UHMWPE动力学行为

摘要

研究了采用氯化镁和硅胶复合载体负载Mg-Ti型催化剂催化乙烯聚合的性能和动力学行为，考察了聚合温度、时间、压力、助催化剂对催化剂性能的影响，以及链转移反应在其中所起到的作用。结果表明，温度对聚乙烯的相对分子质量影响最大，乙烯分压和聚合温度对催化剂的活性有明显影响，存在一个使催化剂高活性的最适宜铝钛物质的量之比。

	Service

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	Email Alert
	RSS
	作者相关文章
	司荣双
	孙红亮
	王烨
	范江洋
	李国兵

关键词：复合载体负载型催化剂；超高相对分子质量聚乙烯；制备；黏均相对分子质量

Abstract：

Catalytic performance and kinetic features are studied by using the Mg-Ti type catalyst supported on SiO₂-MgCl₂ compose-carrier. The influences of the polymerization conditions upon ethylene polymerization process, such as total pressure, polymerization temperature and cocatalyst usage and the role of chain transfer reaction mechanism are investigated. The result shows that the molecular weight of UHMWPE is drastically affected by the temperature. The catalyst activity increases significantly with increasing pressure and temperature. There is an optimal Al/Ti molar ratio of catalyst with high activity.

Keywords： compose-carrier supported catalyst； UHMWPE； preparation； viscosity average molecular weight

Received 2014-12-23;

Corresponding Authors: 范江洋, E-mail: fanjy@tju.edu.cn。 Email: fanjy@tju.edu.cn

About author: 司荣双(1989-),男,硕士研究生,研究方向为超高分子量聚乙烯合成。

引用本文:

司荣双, 孙红亮, 王烨, 范江洋, 李国兵.复合载体负载型催化剂制备UHMWPE动力学行为[J]. 化学工业与工程, 2016,33(5): 33-37

Si Rongshuang, Sun Hongliang, Wang Ye, Fan Jiangyang, Li Guobing.Kinetic Features of UHMWPE Preparation with Compose-Carrier Supported Catalysts[J]. Chemcial Industry and Engineering, 2016,33(5): 33-37

[1] Roghieh J, Gholam H Z, Mohsen J. Synthesizing UHMWPE using Ziegler-Natta catalyst system of MgCl₂(ethoxide type)/TiCl₄/tri-isobutylaluminum[J]. MacromolSymp, 2008, 274: 148-153
[2] Nikolaeva M I, Mikenas T B, Matsko M A, et al. Ethylene polymerization over supported titanium-magnesium catalysts: Effect of polymerization parameters on the molecular weight distribution of polyethylene[J]. Journal of Applied Polymer Science, 2011, 122(5): 3 092-3 101
[3] 刘英,刘萍,陈成泗,等. 超高分子量聚乙烯的特性及应用进展[J]. 国外塑料, 2006,23(11): 36-40 Liu Ying, Liu Ping, Chen Chengsi, et al. Characteristic and application progress of UHMWPE[J]. World Plastics, 2006, 23(11): 36-40(in Chinese)
[4] 李传峰,左胜武,郭峰,等. 负载型非茂金属催化剂聚合制备UHMWPE[J]. 现代塑料加工应用,2009, 21 (4): 32-36 Li Chuanfeng, Zuo Shengwu, Guo Feng, et al. Preparation of UHMWPE by supported non-metallocenecatalysts[J]. Modern Plastics Processing and Applications, 2009, 21 (4): 32-36(in Chinese)
[5] 扬子石化化工有限公司. 复合载体负载的非茂金属催化剂的负载方法和聚合应用:中国,200310106157.4[P]. 2006-10-25
[6] 王路海, 张瑞, 任合刚, 等. MgCl₂-BuOH/TiCl₄催化剂催化乙烯聚合动力学[J]. 合成树脂及塑料, 2009, 26(4): 6-9 Wang Luhai, Zhang Rui, Ren Hegang,et al. Kinetic study on ethylene polymerization with MgCl₂-BuOH/TiCl₄ as catalyst[J].China Synthetic Resin and Plastics, 2009, 26(4): 6-9(in Chinese)
[7] 周淑平,郑刚. 用一点法测超高分子量聚乙烯的特性黏度[J]. 齐鲁石油化工,2000,28(4): 333-334 Zhou Shuping, Zheng Gang. Intrinsic viscosity measurement of ultra high molecular weight polyethylene with one point method[J]. Qilu Petrochemical Technology, 2000, 28(4): 333-334(in Chinese)
[8] Shiono T, Nomura K, Terano M. Progress in olefin polymerization catalysts and polyolefin materials[M]. Amsterdam: Elsevier, 2006
[9] Bergstra M F, Weickert G. Semi-Batch reactor for kinetic measurements of catalyzed olefin co-polymerizations in gas and slurry phase[J]. Chemical Engineering Science, 2006, 61(15): 4 909-4 918
[10] Kissin Y V. Main kinetic features of ethylene polymerization reactions with heterogeneous Ziegler-Natta catalysts in the light of a multicenter reaction mechanism[J]. Journal of Polymer Science Part A:Polymer Chemistry, 2001, 39(10):1 681-1 695
[11] Keii T. Kinetics of Ziegler-Natta polymerization[M]. Tokyo: Kodansha, 1972