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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

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 w...

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Published in:Journal of applied polymer science 2005-03, Vol.95 (6), p.1500-1508
Main Authors: Ceylan, Nilgün Neşe, İlter, Zülfiye, Ceylan, Kadim
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description 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
doi_str_mv 10.1002/app.21403
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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. 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Appl. Polym. Sci</addtitle><description>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. 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subjects activation energy
Applied sciences
Chemical reactions and properties
decomposition
Degradation
Exact sciences and technology
kinetics (polym.)
methacrylate copolymers
Organic polymers
Physicochemistry of polymers
thermogravimetric analysis (TGA)
title Kinetic study of the thermal decomposition of (2-phenyl-1,3-dioxolane-4-yl) methyl methacrylate and 2-hydroxyethyl methacrylate copolymers
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