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International Journal of Polymer Science
Volume 2015 (2015), Article ID 629403, 8 pages
http://dx.doi.org/10.1155/2015/629403
Research Article

Curing Kinetics of Hybrid Networks Composed of Benzoxazine and Multifunctional Novolac Epoxy

1Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi’an 710072, China
2Xi’an Aerospace Composites Research Institute, Xi’an 710025, China

Received 30 September 2014; Revised 20 January 2015; Accepted 21 January 2015

Academic Editor: Beng T. Poh

Copyright © 2015 Wu Ke et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A novel hybrid network composed of benzoxazines (BZ) and novolac epoxy resin (F-51) was prepared successfully. Thermal properties, curing kinetics, and decomposition process were studied using isothermal differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) in this paper. The reactive mechanism of F-51/BZ mixture system is different from the BZ homopolymers at low temperatures; two resin systems follow the autocatalytic model mainly at high temperatures. Thermogravimetric analysis indicates that F-51 can have no significant effect on thermal degradation temperatures and on increasing char yield.