Publication: Curing kinetics of Benzoxazine-epoxy copolymer investigated by non-isothermal differential scanning calorimetry
2
0
Issued Date
2010
Resource Type
File Type
application/pdf
ISSN
1413910
Other identifier(s)
2-s2.0-77953133234
Rights Holder(s)
มหาวิทยาลัยศรีนครินทรวิโรฒ
Bibliographic Citation
Polymer Degradation and Stability. Vol 95, No.6 (2010), p.918-924
Suggested Citation
Jubsilp C., Punson K., Takeichi T., Rimdusit S. Curing kinetics of Benzoxazine-epoxy copolymer investigated by non-isothermal differential scanning calorimetry. Polymer Degradation and Stability. Vol 95, No.6 (2010), p.918-924. doi:10.1016/j.polymdegradstab.2010.03.029 Retrieved from: https://hdl.handle.net/20.500.14740/7576
Author(s)
Abstract
The reaction of epoxy novolac resin cured with benzoxazine resin (BA-a) was investigated under non-isothermal DSC at different heating rates. The kinetic parameters and the kinetic models of the curing processes of the benzoxazine-epoxy novolac mixtures were examined utilizing isoconversional methods, Flynn-Wall-Ozawa and Friedman methods. The benzoxazine-epoxy novolac mixture exhibits two dominant curing processes. The reaction 1 at lower temperature is attributed to the reaction among the benzoxazine monomers, while the reaction 2 corresponds to the formation of an etherification between hydroxyl group of polybenzoxazine and epoxide group or homopolymerization reaction of epoxide group at high temperature. The average activation energies of the reaction 1 and reaction 2 were determined to be 81 kJ mol-1 and 118 kJ mol-1, respectively. The autocatalytic kinetic model was found to be the best description of the investigated curing reactions. In addition, the predicted curves from our kinetic models fit well with the non-isothermal DSC thermogram. © 2010 Elsevier Ltd. All rights reserved.
Subject(s)
Autocatalytic
Autocatalytic curing
Autocatalytic kinetic model
Benzoxazine
Benzoxazine monomers
Benzoxazine resin
Curing kinetics
Curing process
Curing reactions
Epoxide groups
Epoxy copolymers
Epoxy novolac resin
Flynn-Wall-Ozawa
Friedman method
High temperature
Hydroxyl groups
Iso-conversional method
Kinetic models
Non-isothermal DSC
Nonisothermal
Novolac
Polybenzoxazine
Activation energy
Curing
Differential scanning calorimetry
Homopolymerization
Kinetic theory
Polymer blends
Reaction rates
Resins
Epoxy resins
Autocatalytic curing
Autocatalytic kinetic model
Benzoxazine
Benzoxazine monomers
Benzoxazine resin
Curing kinetics
Curing process
Curing reactions
Epoxide groups
Epoxy copolymers
Epoxy novolac resin
Flynn-Wall-Ozawa
Friedman method
High temperature
Hydroxyl groups
Iso-conversional method
Kinetic models
Non-isothermal DSC
Nonisothermal
Novolac
Polybenzoxazine
Activation energy
Curing
Differential scanning calorimetry
Homopolymerization
Kinetic theory
Polymer blends
Reaction rates
Resins
Epoxy resins