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

• 作者: Keya Tang Jincheng Wang
• 来源期刊: 中国化学工程学报（英文版）
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: Regular
• 页码范围: 437-449
• 页数: 13页
• 语种: 英文

摘要

Montmorillonite(MMT)was modified by ultrasound and castor oil quaternary ammonium salt interca-lation 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 com-posite 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 hun-dred 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 disper-sion of the nanosheets in CIIR rubber and the chemical interaction between the organoclay and the poly-mer 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 nanocompos-ite 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.