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Kinetic study on epoxy bisphenol‐A diacrylate IPN formation
Author(s) -
Lin MuShih,
Wang MingWei
Publication year - 1999
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(199912)48:12<1237::aid-pi289>3.0.co;2-c
Subject(s) - diglycidyl ether , fourier transform infrared spectroscopy , epoxy , bisphenol a , materials science , epoxide , curing (chemistry) , benzoyl peroxide , absorbance , reaction rate constant , reaction rate , kinetic energy , polymer chemistry , catalysis , polymer , kinetics , chemistry , chemical engineering , organic chemistry , composite material , polymerization , chromatography , physics , quantum mechanics , engineering
Interpenetrating polymer networks (IPN) based on diglycidyl ether of bisphenol‐A (DGEBA) and bishenol‐A diacrylate (BADA) in weight ratios of 100/0, 50/50, and 0/100 were blended and were cured simultaneously by using benzoyl peroxide (BPO) and 4,4′‐methylenedianiline (MDA) as curing agents. Kinetic study during IPN formation was carried out at 65, 70, 75 and 80 °C. Absorbance changes at 1623.3 cm −1 and 914 cm −1 relating to concentration changes of CC and epoxide were monitored with Fourier‐transform infrared spectroscopy (FTIR). The epoxide cure kinetic data revealed a combination of non‐catalytic bimolecular reaction and a catalyzed termolecular reaction, while the CC cure kinetic data fitted a first‐order reaction. The calculated kinetic parameters indicated decreased rate constants and increased activation energies of the IPN compared with those of the individual components. Presumably, chain entanglements between the two networks provide a sterically hindered environment for the cure reactions and vitrification restrains the chain mobility, accounting for the kinetic parameters. © 1999 Society of Chemical Industry