Thermoreversible Gelation of Isotactic Polystyrene: Thermodynamics and Phase Diagrams

Jean Michel Guenet, Gregory B. Mckenna

Research output: Contribution to journalArticle

90 Scopus citations

Abstract

The thermodynamics of thermoreversible gelation of isotactic polystyrene in cis-decalin,frans-decalin, and 1-chlorodecane was investigated by using differential scanning calorimetry. The gel formation and the gel melting were studied as a function of various parameters such as the cooling or heating rate and the polymer molecular weight. The temperature-concentration phase diagrams were established from both cooling and heating experiments. It is found that the shape of the phase diagram is the same in heating or in cooling, but that for cis-decalin differs from the one for tron.s-decalin. The phase diagrams correspond to various types of compound: congruently melting compound in cis-decalin and compound characterized by a singular point in trans-decalin. In addition, it is shown from optical microscopy experiments and X-ray diffraction experiments that the threefold helical form reappears beyond 50% polymerconcentration in tnms-decalin but does not in cis-decalin.

Original languageEnglish
Pages (from-to)1752-1756
Number of pages5
JournalMacromolecules
Volume21
Issue number6
DOIs
StatePublished - 1988

Fingerprint Dive into the research topics of 'Thermoreversible Gelation of Isotactic Polystyrene: Thermodynamics and Phase Diagrams'. Together they form a unique fingerprint.

  • Cite this