Nonisothermal cure of bisphenol epoxy resin with a nonlinear aliphatic polyamine hardener |
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| Authors: | Dapeng Zhou Hongmei Wang Songsong Wang Dan Liu Yuan Lian |
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| Affiliation: | 1. Biochemistry and Chemical Engineering Department, Jiaxing University, Jiaxing 314001, PR China;2. Materials Science and Engineering Department, Changzhou University, Changzhou 213000, PR China |
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| Abstract: | The amino terminated polypropylenimine dendrimer (DAB‐dendri‐(NH2)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 Ea 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 Ea and curing degree α was obtained by applying model‐free isoconversional analysis with the Kissinger‐Akahira‐Sunose (KAS) method. As α increases, Ea 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 |
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| Keywords: | differential scanning calorimeter epoxy resin curing kinetics KAS method SB (m, n) model |
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