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Kinetic investigation of thermooxidative degradation of poly(vinyl chloride)/acrylonitrile–butadiene–styrene blends by isothermal thermogravimetric analysis
Author(s) -
Klarić I.,
Roje U.,
Stipanelov N.
Publication year - 1999
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/(sici)1097-4628(19990131)71:5<833::aid-app18>3.0.co;2-a
Subject(s) - thermogravimetric analysis , acrylonitrile butadiene styrene , vinyl chloride , acrylonitrile , materials science , polyvinyl chloride , isothermal process , polymer chemistry , copolymer , styrene , activation energy , degradation (telecommunications) , thermal analysis , chemical engineering , composite material , chemistry , thermal , thermodynamics , organic chemistry , polymer , telecommunications , physics , computer science , engineering
The thermal degradation of poly(vinyl chloride)/acrylonitrile–butadiene–styrene (PVC/ABS) blends of different compositions was investigated by means of isothermal thermogravimetric analysis at temperatures of 210°–240°C in flowing atmosphere of air. The Flynn equation, the method of stationary point, and kinetic equation using the Prout–Tompkins model proved to be satisfactory in describing the thermooxidative degradation in the range of 5–30% conversions. The apparent activation energy E and preexponential factor Z were calculated for all compositions of PVC/ABS blends. The ratios E /ln Z are constant for pure and modified PVC and point to the unique mechanism of degradation process. Upon increasing the ratio of ABS in the PVC/ABS blend up to 50%, only the rate of the process is changed; the mechanism remains unchanged. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 833–839, 1999