Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7213932 | Composites Science and Technology | 2018 | 23 Pages |
Abstract
Vitrimers have been emerged as a new class of polymers with many attractive properties of material processing such as reshaping, recycling and repairing. Herein, a new type of vitrimers (BDSER) based on thermosetting dynamic epoxy network with double disulfide bonds was synthesized by the reaction of a difunctional epoxy monomer containing disulfide bonds with 4,4â²-disulfanediyldianiline (4-AFD). Our results demonstrated that the relaxation time of BDSER at 200â¯Â°C was as short as 9â¯s without any catalyst. The storage modulus of BDSER was up to about 2.2â¯GPa and its glass transition temperature was higher than 130â¯Â°C. Additionally, the thermodynamic and chemical properties of BDSER were no significant loss after 3 cycles of continuous breaking/compression molding. Furthermore, the resistance of CNT/PPy/Vitrimer composites (CPV), synthesized by doped BDSER with the polypyrrole (PPy) decorated multi-walled carbon nanotubes (WMCNTs), was decreased to 109â¯Î© even the mass ratio was only 1%wt, which could be used a promising candidate as self-repairing materials in the field of antistatic.
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Authors
Fengtao Zhou, Zijian Guo, Wenyan Wang, Xingfeng Lei, Baoliang Zhang, Hepeng Zhang, Qiuyu Zhang,