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Kinetic study of the thermal decomposition of (2‐phenyl‐1,3‐dioxolane‐4‐yl) methyl methacrylate and 2‐hydroxyethyl methacrylate copolymers
Author(s) -
Ceylan Nilgün Neşe,
İlter Zülfiye,
Ceylan Kadim
Publication year - 2005
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.21403
Subject(s) - thermogravimetry , activation energy , copolymer , dioxolane , thermal decomposition , methyl methacrylate , methacrylate , polymer chemistry , decomposition , materials science , differential thermal analysis , order of reaction , kinetics , chemistry , reaction rate constant , organic chemistry , polymer , inorganic chemistry , physics , quantum mechanics , diffraction , optics
Abstract The kinetics of nonisothermal decomposition of (2‐phenyl‐1,3‐dioxolane‐4‐yl) methyl methacrylate (PDMMA), 2‐hydroxyethyl methacrylate (HEMA), and vinyl‐pyrrolidone (VPy) copolymers were investigated by thermogravimetry (TG) and differential thermal analysis (DTA). The data indicated that the major weight loss occurs in the range of 270 to 450°C. The decomposition characteristics showed essentially two regimes and varied depending on the temperature and the copolymer composition. The apparent kinetic parameters of the decompositions were estimated from both TG and DTA data by using the alternative calculation methods. The results suggest that the weight loss rates may be represented, depending on the type of sample, by a reaction model of overall order 1.0 to 1.6, with an activation energy of approximately 65–95 kJ mol −1 . The DTA data estimated considerably higher values for the overall activation energies, around 198–240 kJ mol −1 . © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 95: 1500–1508, 2005