引用本文:
方天如, 于黎, 刘兆岩, 徐玉伦, 韩纪唐, 刘汉梁, 梁尚锦, 魏同成. 端烯丙基聚硅氧烷的合成及其在乙烯聚合中的行为[J]. 应用化学,
1986, 3(5): 79-81.
Citation: Fang Tianru, Yu Li, Liu Zhaoyan, Xu Yulun, Han Jitang, Liu Hanliang, Liang Shangjin, Wei Tongcheng. SYNTHESIS OF ALLYLTERMINATED POLYDIME-THYLSILOXANES AND THEIR BEHAVIOR IN ETHYLENE POLYMERIZATION[J]. Chinese Journal of Applied Chemistry, 1986, 3(5): 79-81.
Citation: Fang Tianru, Yu Li, Liu Zhaoyan, Xu Yulun, Han Jitang, Liu Hanliang, Liang Shangjin, Wei Tongcheng. SYNTHESIS OF ALLYLTERMINATED POLYDIME-THYLSILOXANES AND THEIR BEHAVIOR IN ETHYLENE POLYMERIZATION[J]. Chinese Journal of Applied Chemistry, 1986, 3(5): 79-81.
端烯丙基聚硅氧烷的合成及其在乙烯聚合中的行为
摘要:
通过与大分子单体的共聚合是合成接枝聚合物的一个重要方法。已有人合成了端苯乙烯和丙烯酸酯的聚硅氧烷大分子单体[1],本文报道对端烯丙基聚二甲基硅氧烷的合成以及添加聚硅氧烷对Ziegler-Natta型催化剂乙烯聚合行为的影响。
English
SYNTHESIS OF ALLYLTERMINATED POLYDIME-THYLSILOXANES AND THEIR BEHAVIOR IN ETHYLENE POLYMERIZATION
Abstract:
Allyl-ended polydimethylsiloxanes (allyl-PDMS)were synthesized via anionic poly merization of octamethylcyclotetrasiloxane (D4), either by using potassium allyl alcoxide as initiator or by adding allyl bromide as chain terminator. The influence of allyl-PDMS on the polymerization of ethylene in Al(C2H5)3-TiCl4-Mg(OC2H5)2 catalyst system was investigated. It was found that the addition of a small amount of allyl-PDMS improved the catalyst activity in the whole polymerization course examined, resulting in an apparent increase of the yield of polyethylene.However, larger amounts of allyl-PDMS added detracted the activity of the catalyst system, and the lower the molecular weight of allyl-PPMS, the stronger the negative effect on the catalyst activity,
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