Synthesis of cis-1,4-polyisoprene with low-temperature prepared Ti-Al catalysts

WANG Zhaowei; YU Junwei; LI Xing; LIU Xiaoxuan

doi:10.11949/j.issn.0438-1157.20150032

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Synthesis of cis-1,4-polyisoprene with low-temperature prepared Ti-Al catalysts

更新时间：2025-11-26

- Synthesis of cis-1,4-polyisoprene with low-temperature prepared Ti-Al catalysts
- CIESC Journal Vol. 66, Issue 7, Pages: 2521-2527(2015)
- 作者机构：
  
  1. 广东工业大学材料与能源学院高分子材料与工程系,广东,广州,510006
  2. 中国广州分析测试中心, 广东省分析测试技术公共实验室,广东,广州,510070
  3. 茂名鲁华化工有限公司,广东,茂名,525000
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150032
  CLC： Q333.3
- Online First：05 July 2015，
  
  Published：05 July 2015
- 稿件说明：
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WANG Zhaowei, YU Junwei, LI Xing, et al. Synthesis of cis-1,4-polyisoprene with low-temperature prepared Ti-Al catalysts[J]. CIESC Journal, 2015, 66(7): 2521-2527.
DOI：

WANG Zhaowei, YU Junwei, LI Xing, et al. Synthesis of cis-1,4-polyisoprene with low-temperature prepared Ti-Al catalysts[J]. CIESC Journal, 2015, 66(7): 2521-2527. DOI： 10.11949/j.issn.0438-1157.20150032.

摘要

采用Ziegler-Natta配位聚合制备了高顺式聚异戊二烯

主要考察了非均相催化体系四氯化钛-三异丁基铝二组分催化剂的预制方法以及催化剂预制条件对异戊二烯体系聚合规律的影响。讨论了催化剂配比、预制催化剂温度和陈化温度对催化剂活性及聚合物的凝胶含量、特征黏度、微观结构含量等方面的影响。同时讨论了催化剂用量、聚合温度和聚合时间对聚合活性及聚合物的凝胶含量、特征黏度、微观含量等方面的影响。研究结果表明

合成高cis-1

4-聚异戊二烯的最佳实验条件为:Al/Ti摩尔比1.0

催化剂预制温度-40℃

陈化2 h

Ti/Ip摩尔比6×10-3

聚合温度50℃

聚合时间5 h。所得聚合物最高转化率为87.1%

cis-1

4结构含量为91.76%。

Abstract

The high cis-1

4-polyisoprene is prepared by Ziegler-Natta coordination polymerization. The effect of preparation method and condition of heterogeneous TiCl4-Al(i-Bu)3 two component catalyst on isoprene polymerization are investigated. The influence of several parameters on the catalytic activity

the gel content

intrinsic viscosity

microstructure and cis-1

4-content of the polyisoprene is examined in detail

including mole ratio of catalyst component

prefabricate temperature and aging time as well as catalyst dosage

polymerization temperature and time. The results show that the optimum conditions of catalyst preparation are as follows: the molar ratio of Al/Ti is 1.0

the temperature of prefabricate is at -40℃

the aging time is 2 h at room temperature

molar ratio of Ti/Ip(catalyst content)is 6×10-3

the polymerization for 5 h at 50℃. Under these condition

the monomer conversion is 87.1% in the polymerization

the microstructure cis-1

4 content in obtained polymer is up to 91.76%.

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