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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis of high molecular weight copolymer of styrene and butadiene bearing high 1,4-cis butadiene unit from copolymerization with CpTiCl3/methylaluminoxan catalyst
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Synthesis of high molecular weight copolymer of styrene and butadiene bearing high 1,4-cis butadiene unit from copolymerization with CpTiCl3/methylaluminoxan catalyst

机译：CpTiCl3 /甲基铝氧烷催化剂共聚合成高分子量苯乙烯-丁二烯高分子量1,4-顺丁二烯单元共聚物

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摘要

Copolymerization of styrene (St) and butadiene (Bd) with CpTiCl3/methylaluminoxane (MAO) catalyst in the presence or absence of chloranil (CA) was investigated. The CpTiCl3/MAO catalyst showed a high activity for the copolymerization of St with Bd. The 1,4-cis contents in the Bd units for the copolymerization of St and Bd with the CpTiCl3/MAO catalyst was observed, and the 1,4-cis content was optimum at a MAO/Ti mole ratio of around 225. The effect of the polymerization temperature on the copolymerization was noted, as was the effect of the 1,4-cis microstructure in the Bd units for the copolymerization of St and Bd. The addition of CA to the CpTiCl3/MAO catalyst was found to influence the molecular weight of the copolymer. The high weight-average molecular weight copolymer (M = ca. 50 X 10(4)) consisting of mainly a 1,4-cis microstructure of Bd units (1,4-cis = 80.0%) was obtained from the copolymerization with the CpTiCl3/MAO catalyst in the presence of CA (CA/Ti mole ratio = 1) at 0degreesC. (C) 2003 Wiley Periodicals, Inc. [References: 26]
机译：研究了在存在或不存在苯甲腈（CA）的情况下，苯乙烯（St）和丁二烯（Bd）与CpTiCl3 /甲基铝氧烷（MAO）催化剂的共聚合。 CpTiCl3 / MAO催化剂对St与Bd的共聚反应具有很高的活性。观察到St和Bd与CpTiCl3 / MAO催化剂共聚时Bd单元中的1,4-顺式含量，并且当MAO / Ti摩尔比约为225时1,4-顺式含量最佳。观察到聚合温度对共聚的影响，以及Bd单元中1，4-顺式微观结构对St和Bd的共聚的影响。发现向CpTiCl3 / MAO催化剂中添加CA会影响共聚物的分子量。通过与Bd单元的共聚得到高重均分子量共聚物（M ＝约50×10（4）），该共聚物主要由Bd单元的1，4-顺式微观结构（1，4-顺式＝ 80.0％）组成。 CpTiCl3 / MAO催化剂在0摄氏度下存在CA（CA / Ti摩尔比= 1）的情况下。 （C）2003 Wiley Periodicals，Inc. [参考：26]

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