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 Citations (Scopus)

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

Fingerprint

Thermoplastic elastomers
Polydimethylsiloxane
Gelation
Nanocrystals
Pyrene
Melting point
Coloring Agents
Dyes
Flow measurement
Shear flow
Hysteresis
Molecular weight
Cooling
Heating
baysilon
Temperature
pyrene

Keywords

  • Nanocrystal
  • Physical gelation
  • Polydimethylsiloxane
  • Thermoplastic elastomer

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Polymers and Plastics

Cite this

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.
Jones, Bryce A. ; Torkelson, John M. / Novel thermoplastic elastomer resulting from physical gelation of telechelically labeled polydimethylsiloxane. Paper presented at ANTEC 2004 - Annual Technical Conference Proceedings, Chicago, IL., United States.5 p.
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Jones, BA & Torkelson, JM 2004, 'Novel thermoplastic elastomer resulting from physical gelation of telechelically labeled polydimethylsiloxane', Paper presented at ANTEC 2004 - Annual Technical Conference Proceedings, Chicago, IL., United States, 5/16/04 - 5/20/04 pp. 4162-4166.

Novel thermoplastic elastomer resulting from physical gelation of telechelically labeled polydimethylsiloxane. / Jones, Bryce A.; Torkelson, John M.

2004. 4162-4166 Paper presented at ANTEC 2004 - Annual Technical Conference Proceedings, Chicago, IL., United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Novel thermoplastic elastomer resulting from physical gelation of telechelically labeled polydimethylsiloxane

AU - Jones, Bryce A.

AU - Torkelson, John M

PY - 2004/6/3

Y1 - 2004/6/3

N2 - 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.

AB - 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.

KW - Nanocrystal

KW - Physical gelation

KW - Polydimethylsiloxane

KW - Thermoplastic elastomer

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Jones BA, Torkelson JM. Novel thermoplastic elastomer resulting from physical gelation of telechelically labeled polydimethylsiloxane. 2004. Paper presented at ANTEC 2004 - Annual Technical Conference Proceedings, Chicago, IL., United States.