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Nonisothermal cure of bisphenol epoxy resin with a nonlinear aliphatic polyamine hardener
Author(s) -
Zhou Dapeng,
Wang Hongmei,
Wang Songsong,
Liu Dan,
Lian Yuan
Publication year - 2011
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.34567
Subject(s) - diglycidyl ether , epoxy , activation energy , bisphenol a , curing (chemistry) , autocatalysis , differential scanning calorimetry , kinetics , materials science , polymer chemistry , chemistry , composite material , thermodynamics , physics , quantum mechanics
The amino terminated polypropylenimine dendrimer (DAB‐dendri‐(NH 2 ) 4 ) was employed as a new nonlinear aliphatic curing agent for diglycidyl ether of bisphenol A (DGEBA). Nonisothermal curing reaction kinetics of DGEBA/DAB was investigated with a differential scanning calorimeter (DSC). The apparent reaction activation energy E a is about 56.7 kJ/mol determined using the Kissinger equation, and a two‐parameter ( m , n ) autocatalytic model ([icirc]Sesták–Berggren equation) was confirmed to be able to well simulate the reaction kinetics in the light of the Málek method. In addition, the relation between reaction activation energy E a and curing degree α was obtained by applying model‐free isoconversional analysis with the Kissinger‐Akahira‐Sunose (KAS) method. As α increases, E a reduced quickly from >80 kJ/mol to ≈60 kJ/mol up to a ≈ 15%, then decreased slowly to 55 kJ/mol till a ∼ 75%, and finally dropped to 44 kJ/mol at full conversion. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011