Journal
POLYMER CHEMISTRY
Volume 4, Issue 18, Pages 4955-4965Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3py00087g
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Funding
- South African Research Chairs Initiative (SARChI) of the Department of Science and Technology (DST)
- National Research Foundation (NRF)
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New thermoset systems based on disulfide bonds were synthesized with self-healing capabilities. The self-healing mechanism is not related to disulfide disulfide exchange reactions, but to thiol disulfide exchange reactions that are pH-dependent. Stress relaxation experiments showed large relaxation for systems having PTM2 as a curing agent, which indicates that the system can rearrange its molecular structure as a mechanism to release stress. However, relaxation rates decreased for samples tested longer after production. This indicates the disappearance of thiol-groups probably caused by thiol thiol oxidation.
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