SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 53 ›› Issue (1): 211-221.DOI: 10.1016/j.cjche.2022.02.013

• Full Length Article • 上一篇    下一篇

Pyridine terminated polyurethane dendrimer/chlorinated butyl rubber nanocomposites with excellent mechanical and damping properties

Jiacheng Chen, Jincheng Wang, Shuhong Li, Kailing Xiang, Shiqiang Song   

  1. College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
  • 收稿日期:2021-10-17 修回日期:2022-02-13 出版日期:2023-01-28 发布日期:2023-04-08
  • 通讯作者: Jincheng Wang,E-mail:wjc406@sues.edu.cn;Shiqiang Song,E-mail:songchem@126.com
  • 基金资助:
    This work was financially supported by the National Natural Science Fundation of China ((51873103), Capacity Building Project of Some Local Colleges and Universities in Shanghai (17030501200), Talent Program of Shanghai University of Engineering Science (2017RC422017) and Postgraduate Research and Innovation Project of Shanghai University of Engineering Science (0234-E3-0903-19-01367).

Pyridine terminated polyurethane dendrimer/chlorinated butyl rubber nanocomposites with excellent mechanical and damping properties

Jiacheng Chen, Jincheng Wang, Shuhong Li, Kailing Xiang, Shiqiang Song   

  1. College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
  • Received:2021-10-17 Revised:2022-02-13 Online:2023-01-28 Published:2023-04-08
  • Contact: Jincheng Wang,E-mail:wjc406@sues.edu.cn;Shiqiang Song,E-mail:songchem@126.com
  • Supported by:
    This work was financially supported by the National Natural Science Fundation of China ((51873103), Capacity Building Project of Some Local Colleges and Universities in Shanghai (17030501200), Talent Program of Shanghai University of Engineering Science (2017RC422017) and Postgraduate Research and Innovation Project of Shanghai University of Engineering Science (0234-E3-0903-19-01367).

摘要: Due to the special viscoelastic property, traditional rubber with high performance has been widely used in human life and production. However, it is challenging to improve the damping property without sacrificing the extensibility. In this work, a novel type of second-generation polyurethane dendrimer terminated with pyridine (G2-Py) was synthesized by using thiolactone chemistry and subsequently complexed with Zn ions. The structure and morphology of G2-Py were characterized. G2-Py-Zn2+ was then mixed with chlorinated butyl rubber (CIIR) by a two-roll mill. A series of CIIR/G2-Py-Zn2+ elastomers were obtained through vulcanization. CIIR/G2-Py-Zn2+ elastomers could achieve high stretchability (a strain of ~1035%), high mechanical strength (a tensile stress of 7.64 MPa). This was benefitted from the friction between G2-Py and CIIR as well as variety of non-covalent bonds provided by G2-Py-Zn2+, which can dissipate energy to further improve the strength and extensibility. The coordination of Zn2+-pyridine was confirmed by Fourier transform infrared spectroscopy, stress relaxation and cycle tensile test. To further investigate the morphology and damping properties of the elastomers, scanning electron microscopy and dynamic mechanical analysis were performed. CIIR-5 showed the best damping performance with higher tanδmax and wider effective damping temperatures. Therefore, this dendrimer modification technology provides wider applications for CIIR elastomers in daily life.

关键词: Coordination bonds, Hydrogen bonds, Polyurethane dendrimer, Nanostructure, Polymers, Composites

Abstract: Due to the special viscoelastic property, traditional rubber with high performance has been widely used in human life and production. However, it is challenging to improve the damping property without sacrificing the extensibility. In this work, a novel type of second-generation polyurethane dendrimer terminated with pyridine (G2-Py) was synthesized by using thiolactone chemistry and subsequently complexed with Zn ions. The structure and morphology of G2-Py were characterized. G2-Py-Zn2+ was then mixed with chlorinated butyl rubber (CIIR) by a two-roll mill. A series of CIIR/G2-Py-Zn2+ elastomers were obtained through vulcanization. CIIR/G2-Py-Zn2+ elastomers could achieve high stretchability (a strain of ~1035%), high mechanical strength (a tensile stress of 7.64 MPa). This was benefitted from the friction between G2-Py and CIIR as well as variety of non-covalent bonds provided by G2-Py-Zn2+, which can dissipate energy to further improve the strength and extensibility. The coordination of Zn2+-pyridine was confirmed by Fourier transform infrared spectroscopy, stress relaxation and cycle tensile test. To further investigate the morphology and damping properties of the elastomers, scanning electron microscopy and dynamic mechanical analysis were performed. CIIR-5 showed the best damping performance with higher tanδmax and wider effective damping temperatures. Therefore, this dendrimer modification technology provides wider applications for CIIR elastomers in daily life.

Key words: Coordination bonds, Hydrogen bonds, Polyurethane dendrimer, Nanostructure, Polymers, Composites