Heat-triggered poly(siloxane-urethane)s based on disulfide bonds for self-healing application

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Rong Sun
  • Ching-Ping Wong

Detail(s)

Original languageEnglish
Article number46532
Journal / PublicationJournal of Applied Polymer Science
Volume135
Issue number31
Online published21 Apr 2018
Publication statusPublished - 15 Aug 2018

Abstract

Polydimethylsiloxane (PDMS) is one of the most widely employed silicon-based polymers for its high flexibility, low usage temperature, excellent water resistance, outstanding electrical insulting property, and physiological inert, etc. However, the covalent-bonded SiO bonds are unable to heal automatically when damaged, which would result in the failure of the materials and devices. Disulfide bond based polymers show high healing efficiency at moderate temperature and have been investigated intensively. Herein, we report a PDMS-based polyurethane self-healing polymer (PDMS-PU) modified with disulfide bonds, which exhibited a reinforced thermal stability, excellent stretchability, and satisfactory self-healing ability. The effect of different ratio of PDMS and disulfide bond contents on the elastomer properties was investigated. With the increase of PDMS content, the decomposition temperature of the PDMS-PU-3 (332 °C) elastomer with highest content of PDMS was increased by 34 °C compared to PDMS-PU-1 (298 °C) with lowest content of PDMS and exhibited a largest elongation at break of 1204%. PDMS-PU-1 with highest content of disulfide bond possessed a highest healing efficiency of 97%. The results indicated the PDMS-PU elastomers can be used as self-healing flexible substrate for flexible electronics.

Research Area(s)

  • elastomers, functionalization of polymers, mechanical properties, thermogravimetric analysis

Citation Format(s)

Heat-triggered poly(siloxane-urethane)s based on disulfide bonds for self-healing application. / Wu, Xinxiu; Li, Jinhui; Li, Gang; Ling, Lei; Zhang, Guoping; Sun, Rong; Wong, Ching-Ping.

In: Journal of Applied Polymer Science, Vol. 135, No. 31, 46532, 15.08.2018.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review