Studies on thermal stability and nonisothermal thermal decomposition kinetics of vinyl chloride-vinyl acetate copolymer prepared via microsuspension polymerization
Dh. Chen et al., Studies on thermal stability and nonisothermal thermal decomposition kinetics of vinyl chloride-vinyl acetate copolymer prepared via microsuspension polymerization, J APPL POLY, 78(5), 2000, pp. 1057-1062
The thermal stability and nonisothermal thermal decomposition kinetics of t
he vinyl chloride-vinyl acetate copolymer synthesized via microsuspension p
olymerization (MS-VC/VAc) were studied by dynamic TG. The results showed th
at MS-VC/VAc gives off hydrogen chloride and acetic acid (HAc) at the same
time when it was heated. VAc content produces little effect on the thermal
stability and the kinetic parameters. The activation energy for giving off
HCl and HAc is in the range of 120-160 kJ/mol and the Arrhenius frequency f
actor 3.27 x 10(9)-9.72 x 10(12) s(-1). For different heating rates, the ki
netic model function of the thermal decomposition obeys the Avrami-Erofeev
model equation, that is, [-ln(1-a)](1/m) for g(a), where m = 0.65-0.85. (C)
2000 John Wiley & Sons, Inc.