Self-healing systems based on disulfide-thiol exchange reactions

M.P.F. Pepels; I.A.W. Filot; B. Klumperman; J.G.P. Goossens

doi:10.1039/c3py00087g

Self-healing systems based on disulfide-thiol exchange reactions

M.P.F. Pepels, I.A.W. Filot, B. Klumperman, J.G.P. Goossens

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Abstract

New thermoset systems based on disulfide bonds were synthesized with self-healing capabilities. The selfhealing 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.

Original language	English
Pages (from-to)	4955-4965
Number of pages	11
Journal	Polymer Chemistry
Volume	4
Issue number	18
DOIs	https://doi.org/10.1039/c3py00087g
Publication status	Published - 2013

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abstract = "New thermoset systems based on disulfide bonds were synthesized with self-healing capabilities. The selfhealing 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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PY - 2013

Y1 - 2013

N2 - New thermoset systems based on disulfide bonds were synthesized with self-healing capabilities. The selfhealing 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.

AB - New thermoset systems based on disulfide bonds were synthesized with self-healing capabilities. The selfhealing 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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DO - 10.1039/c3py00087g

M3 - Article

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VL - 4

SP - 4955

EP - 4965

JO - Polymer Chemistry

JF - Polymer Chemistry

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Self-healing systems based on disulfide-thiol exchange reactions

Abstract

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