Self‐healing supramolecular elastomers based on the multi‐hydrogen bonding of low‐molecular polydimethylsiloxanes: Synthesis and characterization |
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| Authors: | Anqiang Zhang Lin Yang Yaling Lin Lishan Yan Hecheng Lu Lianshi Wang |
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| Affiliation: | 1. College of Material Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou 510641, Guangdong, China;2. College of Resource and Environment, South China Agriculture University, 483 Wushan Road, Guangzhou 510642, Guangdong, China |
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| Abstract: | Novel self‐healing supramolecular elastomers based on polydimethylsiloxanes (SESi) were synthesized from a mixture of polydimethylsiloxanes derivers with single, di‐, or tri‐carboxylic acid groups (PDMS–COOHx, where x = 1, 2, and 3, respectively), diethylene triamine, and urea with a two‐stage procedure. The reactions and the final products were tracked, characterized, and confirmed by Fourier transform infrared spectroscopy, 1H‐NMR, differential scanning calorimetry, dynamic mechanical analysis, and gel permeation chromatography. Compared with a supramolecular rubber based on dimer acid (reported previously) with a similar synthesis procedure, the SESi showed a lower glass‐transition temperature of about ?113°C for the softer chain of polydimethylsiloxane and showed real rubberlike elastic behavior and self‐healing properties at room temperature or even lower temperatures. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 |
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| Keywords: | elastomers self‐assembly supramolecular structures |
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