| SiCl_4、PPh_3促进的TiCl_4/Ni(acac)_2复合催化剂的乙烯聚合研究 |
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| 引用本文： | 张启兴,杨海滨,周勰,王海华. SiCl_4、PPh_3促进的TiCl_4/Ni(acac)_2复合催化剂的乙烯聚合研究[J]. 石油化工, 2001, 30(6) |
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| 作者姓名： | 张启兴 杨海滨 周勰 王海华 |
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| 作者单位： | 中山大学高分子研究所, |
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| 基金项目： | 国家自然科学基金! ( 2 98740 3 9)，广东省自然科学基金!( 980 3 19)资助项目 |
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| 摘 要： | 制备了SiCl4、PPh3促进的MgCl2 -SiO2 -ZnCl2 为载体 ,TiCl4/Ni(acac) 2 为主催化剂的A、B型乙烯聚合高效催化剂。研究了SiCl4、PPh3对乙烯气相聚合的影响 ,发现SiCl4能大幅度提高催化效率 ,PPh3使催化效率出现峰值。用DSC、IR、1 3CNMR对聚合产物进行结构性能的分析和表征。结果表明 ,TiCl4/Ni(acac) 2 组成的复合催化剂较单一Ti系催化剂的聚合产物熔点、结晶度、密度、相对分子质量明显降低。添加PPh3的B型催化剂获得了支化度为 3～ 5的支化聚乙烯 ,表明B型催化剂具有一定的低聚和原位共聚功能。
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| 关 键 词： | 四氯化钛 乙酰丙酮镍 三苯基膦 四氯化硅 齐聚和原位共聚 聚乙烯 |
SiCl_4 and PPh_3 Promoted Supported TiCl_4/Ni(acac)_2 Complex Catalysts for Ethylene Polymerization |
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| ZHANG Qi xing,YANG Hai bin,ZHOU Xie,WANG Hai hua. SiCl_4 and PPh_3 Promoted Supported TiCl_4/Ni(acac)_2 Complex Catalysts for Ethylene Polymerization[J]. Petrochemical Technology, 2001, 30(6) |
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| Authors: | ZHANG Qi xing YANG Hai bin ZHOU Xie WANG Hai hua |
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| Abstract: | High efficiency supported ethylene polymerization catalysts of TiCl 4 -Ni(acac) 2/MgCl 2 SiO 2 ZnCl 2/AlR 3 promoted with SiCl 4(A) and PPh 3(B) were prepared.The effect of SiCl 4 and PPh 3 on gasphase polymerization of ethylene were studied.It is found that SiCl 4 and PPh 3 can enhance catalyst efficiency of ethylene polymerization.The structure and properties of polymerized products wrer characterized by DSC,IR and 13 C NMR.The results indicate that melting point,crystillinity,density and moleculer weight of polyethylene from Ti-Ni catalysts are lower than single Ti catalyst,and branching polyethylene can be obtained with B catalyst.Thus the B catalyst has the function of carrying out oligomerization and in situ copolymerization. [ |
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| Keywords: | TiCl 4 Ni(acac) 2 SiCl 4 PPh 3 oligomerization in site copolymerization polyethylene |
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