期刊
THERMOCHIMICA ACTA
卷 549, 期 -, 页码 132-139出版社
ELSEVIER
DOI: 10.1016/j.tca.2012.09.008
关键词
Epoxy resin; Silicone-contained polyamine; Isothermal curing reaction; Extended Kamal model
资金
- special funds for key innovation team of Zhejiang Province [2009R50016]
- Science and Technology Department of Zhejiang Province, PR China
- Program for Changjiang Scholars and Innovative Research Team in University [IRT09412]
A multifunctional silicone-contained aliphatic polyamine, 1,3-bis(2-aminoethylaminomethyl) tetramethyldisiloxane (SFA), was originally employed to cure bisphenol A epoxy resin (DGEBA) isothermally, and the curing reaction of DGEBA-SFA was systematically investigated by DSC measurement at 55, 60, 65 and 70 degrees C. The model fitting kinetic analysis confirmed that the reaction rate could be well simulated with an autocatalytic Kamal model up to the onset of the diffusion control stage. Taking the diffusion effects into account, the extended Kamal model was applied to fit the experimental reaction rate. with an excellent agreement throughout whole reaction process. The multi-frequency dynamic mechanical analysis shows that the cured DGEBA-SFA appears in a beta relaxation in low temperature and an alpha relaxation in higher temperature interval (>80 degrees C). The relaxation activation energies for alpha and beta relaxations are 70.1 and 287.6 kJ/mol, respectively. (C) 2012 Elsevier B.V. All rights reserved.
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