Investigation of the Effect of Graphite on Microwave Curing Rates of E-51 Epoxy Resin Systems

CHEN Yunlei; LI Yong; GENG Jie; XIAO Jun; ZHOU Keyin

doi:10.7527/S1000-6893.2013.0369

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2013 , Vol. 34 >Issue 12: 2833 - 2840

DOI: https://doi.org/10.7527/S1000-6893.2013.0369

Material Engineering and Mechanical Manufacturing

Investigation of the Effect of Graphite on Microwave Curing Rates of E-51 Epoxy Resin Systems

CHEN Yunlei ,
LI Yong ,
GENG Jie ,
XIAO Jun ,
ZHOU Keyin

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1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2. College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received date: 2013-03-12

Revised date: 2013-08-22

Online published: 2013-08-26

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Abstract

The effect of the amounts and dispersion methods of microwave-absorber graphite on microwave curing rates are studied for the E-51 systems cured with MeTHPA, 650 and DDM agents, respectively. The modified commercial microwave oven is employed as the radiation source, and the differential canning calorimetry (DSC) as the measure method for curing degree. The dispersion of graphite in the resin matrix is characterized by means of SEM. The results show that the curing rates of all epoxy resin systems are raised with the addition of the graphite power, which increas very fast at lower additive amounts and tend to be slight at higher ones, while the relations between the acceleration extent with the doping amount of the graphite power of the three systems are different. And the microwave curing reaction can be accelerated further by taking the ultrasonic dispersion as the mixing process. Importantly, the mechanism is described as that the addition of microwave-absorber can improve the microwave absorbing performance of resin matrix so that the microwave curing reaction is accelerated.

Key words： microwave curing; graphite; epoxy resin; ultrasonic dispersion; composites

Cite this article

CHEN Yunlei , LI Yong , GENG Jie , XIAO Jun , ZHOU Keyin . Investigation of the Effect of Graphite on Microwave Curing Rates of E-51 Epoxy Resin Systems[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013 , 34(12) : 2833 -2840 . DOI: 10.7527/S1000-6893.2013.0369

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