Physical properties of polydimethylsiloxane-containing elastomers and their electrospun nanofibre mats

W. L. Chai, Y. C. Shu, W. C. Tseng, C. C. Chen, S. C. Jang, J. D. Chow, F. S. Chuang, M. F. Lin

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Abstract

A series of polydimethylsiloxane-containing elastomers (Selastomers) were synthesised from 4,4′-diphenylmethane diisocyanate (MDI), 1,4-butanediol (1,4-BD) and polydimethylsiloxane (PDMS). Through TGA analysis, S elastomers exhibited a four-stage degradation. The first and second stages resulted from the degradation of hard segment; the complicated degradation behaviour in the stages is associated with two hard-segment structures in the S elastomers. The third stage was the decomposition of PDMS, in which a cyclosiloxane degradation product was formed; subsequently, at a higher temperature it proved to be macrocyclics, which were degraded in the vicinity of 550 °C Obviously, the degradation of S elastomers differed from the two-stage degradation of conventional polyurethane. Compared to conventional polyurethane, S elastomers presented better mechanical properties, showing the strength and elongation at break about 5.6-20.6 MPa and 550-830 96, respectively. With the better mechanical properties of S elastomers, nano-structured fibre mats were produced by electrospinning. Fibre morphology was observed by SEM and the effects of processing variables, including solution concentrations and voltages, on the morphology were evaluated.

Original languageEnglish
Pages (from-to)431-441
Number of pages11
JournalPolymers and Polymer Composites
Volume17
Issue number7
Publication statusPublished - 2009

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ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Chai, W. L., Shu, Y. C., Tseng, W. C., Chen, C. C., Jang, S. C., Chow, J. D., Chuang, F. S., & Lin, M. F. (2009). Physical properties of polydimethylsiloxane-containing elastomers and their electrospun nanofibre mats. Polymers and Polymer Composites, 17(7), 431-441.