Premium
A study of the thermal degradation of polystyrene by thermal volatilization analysis
Author(s) -
Mehmet Y.,
Roche R. S.
Publication year - 1976
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1976.070200722
Subject(s) - polystyrene , arrhenius equation , volatilisation , polymer , thermodynamics , degradation (telecommunications) , viscosity , materials science , intrinsic viscosity , thermal , molar mass distribution , polymer chemistry , kinetic energy , polymer degradation , atmospheric temperature range , activation energy , chemistry , analytical chemistry (journal) , composite material , organic chemistry , physics , telecommunications , quantum mechanics , computer science
A TVA study of several anionic polystyrene samples, having number average molecular weights in the range of 4.6 × 10 3 to 2 × 10 6 , reveals a hitherto unobserved molecular weight dependence of the overall apparent Arrhenius preexponential factor as determined by the method of Roche. 2 The latter effect is discussed in terms of a model in which the zip length and chainscission rate constants are both functions of molecular weight. It is suggested that the functional dependence of the kinetic parameters on molecular weight is a reflection of their hydrodynamic coupling to the viscosity of the molten polymer.