- Nonisothermal reaction kinetics of DGEBA with four-armed starlike polyamine with benzene core (MXBDP) as novel curing agent
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A four-armed starlike polyamine with a benzene nucleus (MXBDP) was prepared, characterized, and employed as the novel curing agent for epoxy resin of bisphenol A (DGEBA). Nonisothermal reaction kinetics of DGEBA/MXBDP was systematically investigated using a differential scanning calorimeter (DSC) in terms of a model-fitting Málek approach and a model-free advanced isoconversional method of Vyazovkin (AICM). A two-parameter autocatalytic model of esták-Berggren (SB(m, n) model) was substantiated to be able to well describe the nonisothermal reaction rate of DGEBA/MXBDP. In addition, the correlation between effective activation energy Eα upon fractional conversion α was determined with the AICM. The result showed Eα dropped quickly at the initial stage of the reaction up to α ≈ 10%, then showed a relative constant value of ≈57 kJ/mol for α ≈ 10-35%, and finally decreased again from ≈57 to ≈45 kJ/mol until the completion, which implicates quite complex mechanisms of the reaction.
- Wan, Jintao,Li, Bo-Geng,Fan, Hong,Bu, Zhi-Yang,Xu, Cun-Jin
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experimental part
p. 46 - 52
(2011/01/11)
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- POLYAMINE DERIVATIVE AND POLYOL DERIVATIVE
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A novel polyamine derivative, or polyol derivative, having a piperidylaminotriazine skeleton, salts of such compounds, a process for producing them, an organic material stabilizer comprising any of such compounds, a method of stabilizing an organic materi
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Page/Page column 31
(2008/06/13)
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