TY - JOUR
T1 - Preparation of self-healing, recyclable epoxy resins and low-electrical resistance composites based on double-disulfide bond exchange
AU - Zhou, Fengtao
AU - Guo, Zijian
AU - Wang, Wenyan
AU - Lei, Xingfeng
AU - Zhang, Baoliang
AU - Zhang, Hepeng
AU - Zhang, Qiuyu
N1 - Publisher Copyright:
© 2018
PY - 2018/10/20
Y1 - 2018/10/20
N2 - 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 4,4′-disulfanediyldianiline (4-AFD). Our results demonstrated that the relaxation time of BDSER at 200 °C was as short as 9 s without any catalyst. The storage modulus of BDSER was up to about 2.2 GPa and its glass transition temperature was higher than 130 °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 109 Ω even the mass ratio was only 1%wt, which could be used a promising candidate as self-repairing materials in the field of antistatic.
AB - 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 4,4′-disulfanediyldianiline (4-AFD). Our results demonstrated that the relaxation time of BDSER at 200 °C was as short as 9 s without any catalyst. The storage modulus of BDSER was up to about 2.2 GPa and its glass transition temperature was higher than 130 °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 109 Ω even the mass ratio was only 1%wt, which could be used a promising candidate as self-repairing materials in the field of antistatic.
KW - A: Functional composites
KW - B: Thermomechanical properties
KW - C: Stress relaxation
KW - Reversible covalent bond
KW - Self healing
UR - http://www.scopus.com/inward/record.url?scp=85050682099&partnerID=8YFLogxK
U2 - 10.1016/j.compscitech.2018.07.041
DO - 10.1016/j.compscitech.2018.07.041
M3 - 文章
AN - SCOPUS:85050682099
SN - 0266-3538
VL - 167
SP - 79
EP - 85
JO - Composites Science and Technology
JF - Composites Science and Technology
ER -