Viscosity/relaxation patterns for inorganic and organic chain and crosslinked polymer systems. A comparison with simple liquid behavior

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The author reviews and updates the 'strong' and 'fragile' classification of ionic and molecular liquids. The author then extends this type of analysis to organic chain polymer systems. However, here the mw dependence of viscosity pre-exponents requires that a microscopic relaxation time be substituted. The author shows that the relaxation time for longitudinal stress which coincides with the 13C NMR relaxation time, is an appropriate choice, and then analyzes the existing data to show that polymer fragilities may exceed those of any simple liquids. On the other hand with suitable cross-linking, the 'strong' liquid extreme can be explored. The prospect of identifying the rigidity percolation threshold for organic polymers is discussed.

Original languageEnglish (US)
Title of host publicationPolymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering
PublisherPubl by ACS
Pages755
Number of pages1
Volume62
StatePublished - 1990
EventProceedings of the ACS Division of Polymeric Materials: Science and Engineering - Boston, MA, USA
Duration: Apr 1 1990Apr 1 1990

Other

OtherProceedings of the ACS Division of Polymeric Materials: Science and Engineering
CityBoston, MA, USA
Period4/1/904/1/90

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Polymers and Plastics
  • Engineering(all)

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