期刊
CHEMISTRY OF MATERIALS
卷 26, 期 6, 页码 2038-2046出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm4040616
关键词
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资金
- Natural Science Foundation of China [51273214, 20874117, 51073176, 51333008]
- Doctoral Fund of the Ministry of Education of China [20090171110026]
- Science and Technology Program of Guangdong Province [2010B010800021, 2010A011300004, 2011A091102001, S2013020013029]
- Basic Scientific Research Foundation in Colleges and Universities of Ministry of Education of China [12lgjc08]
Tri-n-butylphosphine (TBP) has been shown to effectively catalyze an air-insensitive disulfide metathesis reaction under alkaline conditions at room temperature. A cross-linked polysulfide containing the phosphine exhibited repeated autonomous self-healing resulting in restoration of tensile strength as a result of the dynamic exchange of disulfide bonds. Interestingly, the cross-linked polysulfide can also be reshaped and reprocessed at room temperature via the TBP-mediated reshuffling of the macromolecular networks. The mechanical properties and self-healing ability of polymeric specimens made from chopped samples remain surprisingly constant. In sharp contrast, control specimens without the phosphine catalyst or S-S bonds are neither self-healable nor reprocessable.
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