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Thermal stabilization of PVC with khaya seed oil: Thermogravimetric studies
Author(s) -
Okieimen F. E.,
Eromonsele Oluyemisi C.
Publication year - 2000
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 - 10.1002/1097-4628(20000815)77:7<1432::aid-app4>3.0.co;2-2
Subject(s) - thermogravimetric analysis , thermogravimetry , degradation (telecommunications) , thermal stability , materials science , order of reaction , chemistry , reaction rate constant , nuclear chemistry , polymer chemistry , kinetics , chemical engineering , organic chemistry , inorganic chemistry , telecommunications , quantum mechanics , physics , computer science , engineering
Thermal degradation of PVC stabilized with barium and cadmium soaps of Khaya senegalensis seed oil was studied by thermogravimetry up to 500°C using a constant heating rate of 10°C min −1 . At temperatures below 300°C, the extents of dehydrochlorination of both the unstabilized and stabilized PVC samples were low (less than 6% conversion). It was found from the values of weight loss that HCl was the only volatile product of degradation of PVC between 170 and 200°C. The rates of dehydrochlorination at about 200°C was of the order of 10 −2 % min −1 , about the same order of magnitude as the values obtained from kinetic studies. The temperatures at which maximum rates of degradation were attained, t d max , and the temperatures at which various extents of degradation were attained were used to assess the effectiveness of the metal soaps of Khaya seed oil in stabilizing PVC against thermal degradation. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 1432–1438, 2000