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Tongfei Wu, Kevin O′Kelly and Biqiong Chen Biomimetic chitosan-treated clay–elastomer composites with water-responsive mechanically dynamic properties Journal of Polymer Science Part B: Polymer Physics 52

Version of Record online: 15 OCT 2013 | DOI: 10.1002/polb.23393

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Biomimetic thermoplastic polyurethane (TPU) composites with mechanically adaptive behaviors were successfully prepared using hydrophilic and pH-sensitive chitosan-treated clay. The treated clay provided remarkable enhancements of the storage modulus and water swelling degree of TPU, which offered reversible, water-responsive, and pH-sensitive changes of mechanical behavior. This study demonstrates a facile method to control the water-absorbing behavior and produce “smart” elastomeric composites with desirable mechanical properties under dry and wet conditions.

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