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Kinetic study of the thermal decomposition of poly(oxypropylene) glycols by differential scanning calorimetry
Author(s) -
Van Kim Vo,
Malhotra Shadi L.,
Blanchard LouisP.
Publication year - 1974
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.1974.070180910
Subject(s) - differential scanning calorimetry , activation energy , decomposition , thermal decomposition , kinetic energy , kinetics , nitrogen , calorimeter (particle physics) , analytical chemistry (journal) , chemistry , materials science , thermodynamics , polymer , polymer chemistry , composite material , chromatography , organic chemistry , physics , quantum mechanics , detector , electrical engineering , engineering
The thermal decomposition of poly(oxypropylene) glycols was studied under nitrogen and dynamic operating conditions over the temperature range of 320° to 700°K by means of a differential scanning calorimeter. The differential energy losses due to changes in emissivity of the reference and sample pans were computed by modifying the baseline of the thermograms. Kinetic parameters obtained with the help of the Borchardt and Daniels theory indicate that the reaction is zero order and that the activation energy increases with molecular weight of the polymer. The rate of heating of the sample, the rate of flow of nitrogen, and the initial mass of the sample do not have significant effects on the kinetics of the decomposition.