SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2022, Vol. 42 ›› Issue (2): 437-449.DOI: 10.1016/j.cjche.2021.02.001

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Chlorinated butyl rubber/two-step modified montmorillonite nanocomposites: Mechanical and damping properties

Keya Tang, Jincheng Wang   

  1. College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
  • 收稿日期:2020-09-21 修回日期:2021-01-30 出版日期:2022-02-28 发布日期:2022-03-30
  • 通讯作者: Jincheng Wang,E-mail:wjc406@sues.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (51873103), Capacity Building Project of Some Local Colleges and Universities in Shanghai (17030501200), Scientific and Technological Support Projects in the Field of Biomedicine (19441901700), Talent Program of Shanghai University of Engineering Science (2017RC422017), and First-rate Discipline Construction of Applied Chemistry (2018xk-B-06).

Chlorinated butyl rubber/two-step modified montmorillonite nanocomposites: Mechanical and damping properties

Keya Tang, Jincheng Wang   

  1. College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
  • Received:2020-09-21 Revised:2021-01-30 Online:2022-02-28 Published:2022-03-30
  • Contact: Jincheng Wang,E-mail:wjc406@sues.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51873103), Capacity Building Project of Some Local Colleges and Universities in Shanghai (17030501200), Scientific and Technological Support Projects in the Field of Biomedicine (19441901700), Talent Program of Shanghai University of Engineering Science (2017RC422017), and First-rate Discipline Construction of Applied Chemistry (2018xk-B-06).

摘要: Montmorillonite (MMT) was modified by ultrasound and castor oil quaternary ammonium salt intercalation method to prepare a new type of organic montmorillonite (OMMT). The surface structure, particle morphology, interlayer distance, and thermal behavior of the samples obtained were characterized. The modified OMMT was then added to chlorinated butyl rubber (CIIR) by mechanical blending, and a composite material with excellent damping properties was obtained. The mechanical experiment results of CIIR nanocomposites showed that the addition of OMMT improved their tensile strength, hardness, and stress relaxation rate. Compared with pure CIIR, when the content of OMMT was 5 phr (part per hundred of rubber), the tensile strength of the nanocomposite was increased by 677% and the elongation at break was also increased by 105.4%. The enhancement of this performance was mainly due to the dispersion of the nanosheets in CIIR rubber and the chemical interaction between the organoclay and the polymer matrix, which was confirmed by morphology and spectral analysis. OMMT also endowed a positive effect on the damping properties of CIIR nanocomposites. After adding 5 phr of OMMT, the nanocomposite owned the best damping performance, and the damping factor, tanδmax, was 37.9% higher than that of pure CIIR. Therefore, the good damping and mechanical properties of these CIIR nanocomposites provided some novel and promising methods for preparing high-damping rubber in a wide temperature range.

关键词: Montmorillonite, Nanostructure, Chlorinated butyl rubber, Polymer processing, Composites

Abstract: Montmorillonite (MMT) was modified by ultrasound and castor oil quaternary ammonium salt intercalation method to prepare a new type of organic montmorillonite (OMMT). The surface structure, particle morphology, interlayer distance, and thermal behavior of the samples obtained were characterized. The modified OMMT was then added to chlorinated butyl rubber (CIIR) by mechanical blending, and a composite material with excellent damping properties was obtained. The mechanical experiment results of CIIR nanocomposites showed that the addition of OMMT improved their tensile strength, hardness, and stress relaxation rate. Compared with pure CIIR, when the content of OMMT was 5 phr (part per hundred of rubber), the tensile strength of the nanocomposite was increased by 677% and the elongation at break was also increased by 105.4%. The enhancement of this performance was mainly due to the dispersion of the nanosheets in CIIR rubber and the chemical interaction between the organoclay and the polymer matrix, which was confirmed by morphology and spectral analysis. OMMT also endowed a positive effect on the damping properties of CIIR nanocomposites. After adding 5 phr of OMMT, the nanocomposite owned the best damping performance, and the damping factor, tanδmax, was 37.9% higher than that of pure CIIR. Therefore, the good damping and mechanical properties of these CIIR nanocomposites provided some novel and promising methods for preparing high-damping rubber in a wide temperature range.

Key words: Montmorillonite, Nanostructure, Chlorinated butyl rubber, Polymer processing, Composites