STUDY OF MECHANICAL PROPERTIES AND CURING KINETICS OF IPN SYSTEM BASED ON EPOXY RESIN/BISPHENOL A-BASED BENZOXAZINE RESIN

Abstract

Abstract: This article applied Interpenetrating Polymer Network(IPN)technology to prepare complete epoxy resin/benzoxazine IPN system. The obtained composite material were processed to testing specimens and the mechanical properties were measured. Differential scanning calorimeter (DSC) was used to characterize the thermodynamic behaviors of the composite. The data obtained from DSC results was used in Kissinger, Ozawa and Crane equation to calculate the average activation energy, reaction order in the curing reaction of the composite. Research results showed that the toughness of the composite increased with the adding of epoxy resin. When the content of epoxy resin increased to 40%, the bending strength and bending modulus were changed to 98.2 MPa and 4.04 MPa, respectively. Compared with the bending strength and bending modulus of pure polybenzoxazine with the value of 79.31 MPa and 4.71 MPa, respectively, the IPN system showed a tendency to change from hard to soft. The analysis of curing kinetics indicated that the curing reaction had much lower apparent activation energy than before, and it was always a simple first-order reaction.

Key words: epoxy resin, benzoxazine resin, IPN, curing kinetics

CLC Number:

TB332

LV Jun-wei, WANG Bin, LI Hui. STUDY OF MECHANICAL PROPERTIES AND CURING KINETICS OF IPN SYSTEM BASED ON EPOXY RESIN/BISPHENOL A-BASED BENZOXAZINE RESIN[J]. Fiber Reinforced Plastics/Composites, 2018, 0(11): 31-36.

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