| 助催化剂对N催化剂催化乙烯-苯乙烯共聚反应的影响 |
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| 引用本文： | 王齐,季立文.助催化剂对N催化剂催化乙烯-苯乙烯共聚反应的影响[J].高分子学报,2005(1):4-7. |
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| 作者姓名： | 王齐 季立文 |
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| 作者单位： | 浙江大学高分子科学与工程系,杭州,310027;浙江大学高分子科学与工程系,杭州,310027 |
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| 摘 要： | 研究了N催化剂分别与助催化剂AlEt3和Et2 AlOAlEt2 结合 ,在给电子体二苯基二甲氧基硅烷 (DDS)存在下 ,催化乙烯和苯乙烯共聚合反应 ,考察了Al Ti摩尔比对共聚反应的影响 .共聚产物经过丁酮 (MEK)和四氢呋喃 (THF)连续抽提 ,表明共聚产物包括无规聚苯乙烯 ,乙烯 苯乙烯共聚物和乙烯均聚物 .乙烯 苯乙烯共聚物分别用1 3C NMR、DSC和GPC进行表征 ,结果表明 ,助催化剂不仅对N催化剂的聚合活性有影响 ,而且对共聚产物中各级份的重量比例也有显著影响 ;特别是对乙烯 苯乙烯共聚物中苯乙烯的含量、熔点 (Tm)和玻璃化转变温度 (Tg)有明显的影响 .
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| 关 键 词： | N催化剂 助催化剂 乙烯-苯乙烯共聚物 |
| 修稿时间： | 2003年11月1日 |
INFLUENCE OF COCATALYST ON THE COPOLYMERIZATION OF ETHYLENE AND STYRENE CATALYZED BY N-CATALYST |
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| WANG Qi,JI liwen.INFLUENCE OF COCATALYST ON THE COPOLYMERIZATION OF ETHYLENE AND STYRENE CATALYZED BY N-CATALYST[J].Acta Polymerica Sinica,2005(1):4-7. |
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| Authors: | WANG Qi JI liwen |
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| Abstract: | The copolymerization of ethylene and styrene was carried out using N catalyst activated with AlEt 3 and Et 2AlOAlEt 2 at the present of DDS.The optimum copolymerization conditions of Al/Ti was investigated.The copolymerization products were fractionated by successive solvents extraction with boiling butanone and THF.The experimental results indicate the copolymerization products include polystyrene,ethylene-styrene copolymer,and polyethylene.The ethylene-styrene copolymers were characterized by 13C-NMR,DSC and GPC.It is found that cocatalyst not only affects copolymerization activity of N-catalyst,but also influences the ratio of different fractions in coplymerization products,especially the styrene incorporation,the melting point and the glass transition temperature of ethylene-styrene copolymer, |
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| Keywords: | N-catalyst Cocatalyst Ethylene-styrene copolymer |
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