TITLE:
Thermal Stability and Decomposition Kinetics of Polysuccinimide
AUTHORS:
Li Zhang, Mingxing Huang, Cairong Zhou
KEYWORDS:
Polysuccinimide; Thermal Gravimetric Analysis; Thermal Stability; Decomposition Kinetics
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.4 No.12,
December
16,
2013
ABSTRACT: The thermal
stability and decomposition kinetics of polysuccinimide (PSI) were investigated using analyzer DTG-60 under
high purity nitrogen atmosphere at different heating rates (3, 6, 9, 12 K/min). The thermal decomposition
mechanism of PSI was determined by Coats-Redfern method. The kinetic parameters
such as activation energy (E), pre-exponential
factor (A) and reaction order (n) were calculated by Flynn-Wall-Ozawa
and Kissinger methods. The results show that the thermal decomposition of PSI
under nitrogen atmosphere mainly occurs in the temperature range of 619.15-693.15 K, the reaction order (n)
was ,
the activation energy (E) and
pre-exponential factor (A) were obtained
to be 106.585 kJ/mol and 4.644 × 109 min-1, the integral and differential
forms of the thermal decomposition mechanism of PSI were found to be and ,
respectively. The results play an important role in understanding the
thermodynamic properties of polysuccinimide.