Self-healing systems based on disulfide-thiol exchange reactions
Self-healing systems based on disulfide-thiol exchange reactions
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DOI：
10.1039/c3py00087g
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发表时间：
2013-09-21
影响因子：
4.6
通讯作者：
Goossens, Han
中科院分区：
文献类型：
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作者：
Pepels, Mark;Filot, Ivo;Goossens, Han
基于二硫键合成了具有自修复能力的新型热固性体系。自修复机制与二硫键 - 二硫键交换反应无关，而是与依赖于pH的巯基 - 二硫键交换反应有关。应力松弛实验表明，以PTM2作为固化剂的体系有较大的松弛，这表明该体系能够重新排列其分子结构作为释放应力的一种机制。然而，生产后放置时间较长的样品其松弛速率降低。这表明巯基可能因巯基 - 巯基氧化而消失。
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.