Novel thermoplastic elastomer resulting from physical gelation of telechelically labeled polydimethylsiloxane

Bryce A. Jones*, John M Torkelson

*Corresponding author for this work

Research output: Contribution to conferencePaper

2 Scopus citations

Abstract

Polydimethylsiloxane (PDMS) that has been labeled on both chain ends with a pyrene-based dye yields a novel thermoplastic elastomer. This behavior is due to thermoreversible physical gelation in the bulk state associated with nanocrystal formation of the pyrene dyes that are strongly insoluble in the PDMS. The gelation temperature, which is equal to the nanocrystal melting temperature, can be tuned by varying the PDMS molecular weight. At the nanocrystal melting temperature, a greater than three order of magnitude change in the value of tan 5 is observed from oscillatory shear flow measurements. Significant hysteresis is observed upon heating and cooling due to the time needed to achieve equilibrium nanocrystal formation.

Original languageEnglish (US)
Pages4162-4166
Number of pages5
StatePublished - Jun 3 2004
EventANTEC 2004 - Annual Technical Conference Proceedings - Chicago, IL., United States
Duration: May 16 2004May 20 2004

Other

OtherANTEC 2004 - Annual Technical Conference Proceedings
CountryUnited States
CityChicago, IL.
Period5/16/045/20/04

Keywords

  • Nanocrystal
  • Physical gelation
  • Polydimethylsiloxane
  • Thermoplastic elastomer

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Polymers and Plastics

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    Jones, B. A., & Torkelson, J. M. (2004). Novel thermoplastic elastomer resulting from physical gelation of telechelically labeled polydimethylsiloxane. 4162-4166. Paper presented at ANTEC 2004 - Annual Technical Conference Proceedings, Chicago, IL., United States.