Diffusion of organic solvents in isobutylene-based polymers

Seong Uk Hong, J. Larry Duda, David C. Venerus

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Diffusion behavior of several organic solvents in polyisobutylene (PIB) and in poly(p-methylstyrene-co-isobutylene) (PMS-BR) with different monomer ratios has been studied. The experiments have been conducted over a temperature range of 50 to 100°C using a conventional gravimetric sorption technique. The PMS-BR copolymers contained 2, 7, and 15 weight percent p-methylstyrene, respectively. Although employing temperatures were far above the glass transition temperatures of polymers, the diffusion coefficients are correlated well with the Vrentas-Duda free-volume theory. For all the solvents, the PIB shows the highest diffusivity while the copolymer with the 15% p-methylstyrene gives the lowest value. This behavior can be explained by the amount of fractional free-volume present in a system.

Original languageEnglish (US)
Pages (from-to)255-260
Number of pages6
JournalKorean Journal of Chemical Engineering
Volume13
Issue number3
DOIs
StatePublished - Jan 1 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Chemistry(all)

Keywords

  • Diffusion
  • Free-volume
  • Glass Transition
  • Polymer
  • Solvent

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