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Kinetics of thermal degradation of thermotropic poly( p ‐oxybenzoate‐ co ‐ethylene‐2,6‐naphthalate) by single heating rate methods
Author(s) -
Zhang Li,
Ma Jinghong,
Zhu Xinyuan,
Liang Borun
Publication year - 2004
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/app.13600
Subject(s) - thermotropic crystal , activation energy , kinetics , thermogravimetry , materials science , monomer , ethylene , degradation (telecommunications) , thermal stability , polymer chemistry , thermal , copolyester , order of reaction , chemical engineering , polymer , reaction rate constant , chemistry , composite material , organic chemistry , polyester , thermodynamics , liquid crystalline , catalysis , telecommunications , physics , quantum mechanics , computer science , engineering
The kinetics of thermal degradation of thermotropic liquid crystalline poly( p ‐oxybenzoate‐ co ‐ethylene‐2,6‐naphthalate) (PHB/PEN) with the monomer ratio of 60 : 40 and PEN in nitrogen was studied by dynamic thermogravimetry (TG). The kinetic parameters, including the activation energy E a , the reaction order n , and the frequency factor ln (Z) of the degradation reaction for PHB/PEN (60 : 40) and PEN were analyzed by the single heating rate methods of Friedman and Chang. The effects of the heating rate and the calculating method on the thermostable and degradation kinetic parameters are systematically discussed. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 91:3915–3920, 2004