Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (12): 20250184.doi: 10.7503/cjcu20250184

• Polymer Chemistry • Previous Articles     Next Articles

Structure Regulation of Chlorinated Trans-1,4-butadiene-co-isoprene Rubber

XING Yuhang, WANG Li, ZHAO Jiruo, SHAO Huafeng(), HE Aihua()   

  1. Shandong Key Laboratory of High Performance Polyolefin Materials and Recycling,Key Laboratory of Rubber?Plastics,Ministry of Education/Shandong Province Key Laboratory of High Performance Rubber Materials and Engineering,School of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China
  • Received:2025-07-04 Online:2025-12-10 Published:2025-10-14
  • Contact: SHAO Huafeng, HE Aihua E-mail:hfshao@qust.edu.cn;ahhe@qust.edu.cn
  • Supported by:
    the National Key Research and Development Program of China[No.2022YFB3704700(2022YFB3704702);the National Natural Science Foundation of China(52473096);the Major Scientific and Technological Innovation Project of Shandong Province, China(2021CXGC010901);the Taishan Scholar Program, China

Abstract:

The structure of trans butadiene-isoprene copolymer rubber(TBIR) involved in chlorination reaction is complex, and its derivative, chlorinated trans-1,4-poly(butadiene-co-isoprene) rubber(CTBIR), achieves rubber elasticity and polarity mainly depending on its double bond and allyl chloride structures. This article aims to regulate the double bond and allyl chloride structure in CTBIR by controlling the chlorination reaction conditions, such as chlorination time, temperature, chlorine gas introduction methods, free radical scavengers, and UV irradiation. A high initial reaction temperature preserves the double bond content in CTBIR while reducing its chlorine content. The method of circulating chlorine gas facilitates achieving high chlorine content while maintaining high double bond content. The adding of 2,2,6,6-tetramethylpiperidyl-1-oxyl(TEMPO) is beneficial for maintaining the double bond content in CTBIR. The allyl chloride structure in CTBIR can be regulated by reaction temperature, reaction time and the addition of TEMPO. Regulating the structure of chlorination product provides a basis for the halogenation reaction of rubber. The regulation of halogenation products can provide the selection of reaction sites for the subsequent structural modification of CTBIR.

Key words: Chlorination, Trans-1, 4-poly(butadiene-co-isoprene)rubber, Allyl chlorine, Structure regulation, Molecular weight

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