The effects of solvent type on the concentration dependence of the compression modulus of thermoreversible isotactic polystyrene gels

G. B. McKenna, J. ‐M Guenet

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Solutions of isotactic polystyrene in either trans‐decalin or 1‐chlorodecane were transformed into gels by quenching from a high temperature (ca. 180°C) to −20°C. The relaxation modulus in compression of these gels was measured over a range of concentrations of from 0.04 g/g to 0.40 g/g. At 22°C, the gels show a double logarithmic stress relaxation rate, m, which is higher than for PVC and gelatin gel systems. 120 s isochronal modulus concentration diagrams exhibit non‐power law behavior, i.e., not only is the general trend such that the double logarithmic slope decreases with increasing concentration, but there are also regions in which abrupt changes in modulus occur over narrow ranges in concentrations. These features in the concentration dependence of the modulus are less pronounced than those found previously1 in isotactic polystyrene/cis‐decalin gels. The behavior is interpreted to be inconsistent with a fringed micelle picture of the gel structure. Preliminary results are reported indicating that polymer fraction and temperature of gel formation can significantly affect the modulus of the gels.

Original languageEnglish
Pages (from-to)267-276
Number of pages10
JournalJournal of Polymer Science Part B: Polymer Physics
Volume26
Issue number2
DOIs
StatePublished - Feb 1988

Fingerprint Dive into the research topics of 'The effects of solvent type on the concentration dependence of the compression modulus of thermoreversible isotactic polystyrene gels'. Together they form a unique fingerprint.

Cite this