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Thermoreversible gelation of isotactic poly(methyl methacrylate) in butyl acetate: a differential scanning calorimetry study
Author(s) -
Spěváček Jiří,
Saiani Alberto,
Guenet JeanMichel
Publication year - 1996
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1996.030170604
Subject(s) - differential scanning calorimetry , methyl methacrylate , tacticity , polymer chemistry , monomer , poly(methyl methacrylate) , enthalpy , polymer , materials science , solvent , methacrylate , stoichiometry , chemistry , organic chemistry , polymerization , thermodynamics , composite material , physics
Abstract The thermal behaviour of thermoreversible gels prepared well below room temperature from isotactic poly(methyl methacrylate) (i‐PMMA) in butyl acetate (BAC) was investigated by means of differential scanning calorimetry. Gel‐formation and gel‐melting enthalpies together with melting enthalpy of the solvent were determined as functions of polymer concentration. The results are consistent with the existence of a polymer/solvent complex with a stoichiometry of 1,5–2 BAC molecules per i‐PMMA monomeric unit.