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IJSTR >> Volume 2- Issue 5, May 2013 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Comparison Of The Dynamic Curing Kinetics Of Araldite DLS 772 / 4 4' DDS Epoxy System Using Differential Scanning Calorimetry And Microwave Heated Calorimeter

[Full Text]



Babatunde Bolasodun, Alan Nesbitt, Arthur Wilkinson, Richard Day



Keywords- curing; differential scanning calorimetry; epoxy; microwave heated calorimeter; kinetics



Abstract: - Comparative studies were carried out on the curing kinetics of an epoxy resin Araldite DLS 772 mixed with a hardener, 4 4' Diaminodiphenyl sulfone. Differential scanning calorimetry and a microwave heating calorimeter were used to monitor the curing kinetics of conventionally and microwave cured epoxy samples. These studies were carried out under non-isothermal conditions using five different heating rates. There was a significant increase in the fractional conversion of the microwave cured samples compared to the conventionally cured samples. The curing reactions for samples cured using microwave heating took place over a smaller temperature range. Higher reaction rates were observed in the samples cured using microwave heating. The activation energies of the microwave cured samples of Araldite DLS 772 / 4 4'DDS epoxy system were about ten percent lower than activation energies of conventionally cured samples.



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