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Disulfide exchange assisted self-healing epoxy/PDMS/graphene oxide nanocomposites.

ABSTRACT: Vitrimers, a class of polymeric networks that change their topology above a threshold temperature, have been investigated in recent years. In order to further extend their properties, in this research, we demonstrate disulfide exchange assisted polydimethylsiloxane (PDMS)- and graphene oxide (GO)-involved epoxy vitrimers, which exhibit a reduction in glass transition temperature and storage modulus with increase in flexural strain and low-temperature self-healing. Stress relaxation and Arrhenius study were carried out for the analysis of vitrimeric behavior, where the prepared epoxy material displays self-healing at 80 °C for 5 min, whereas a low-temperature self-healing (60 °C) was observed for epoxy/PDMS/GO nanocomposites.

SUBMITTER: Krishnakumar B

PROVIDER: S-EPMC9419268 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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Disulfide exchange assisted self-healing epoxy/PDMS/graphene oxide nanocomposites.

Krishnakumar Balaji B Singh Manjeet M Parthasarthy Vijay V Park Chanwook C Sahoo Nanda Gopal NG Yun Gun Jin GJ Rana Sravendra S

Nanoscale advances 20200603 7

Vitrimers, a class of polymeric networks that change their topology above a threshold temperature, have been investigated in recent years. In order to further extend their properties, in this research, we demonstrate disulfide exchange assisted polydimethylsiloxane (PDMS)- and graphene oxide (GO)-involved epoxy vitrimers, which exhibit a reduction in glass transition temperature and storage modulus with increase in flexural strain and low-temperature self-healing. Stress relaxation and Arrhenius ...[more]

PMID: 36132387

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