Study on the Effect of Carboxyl Terminated Butadiene Acrylonitrile (CTBN) Copolymer Concentration on the Decomposition Kinetics Parameters of Blends of Glycidyl Epoxy and Non-Glycidyl Epoxy Resin

Garima Tripathi, Deepak Srivastava

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DOI: 10.4236/ijoc.2011.13016                

Abstract

The degradation of the epoxy system was studied for the prepared six blend samples with the incorporation of 0 wt% - 25 wt% carboxyl terminated butadiene acrylonitrile (CTBN) copolymer, on a dynamic basis using Thermo gravimetric analysis (TGA) technique under a nitrogen atmosphere. The blends were prepared by physical mixing and were cured with diamine. The degradation of each sample followed second-order degradation kinetics, which was calculated by Coats-Redfern equation using best-fit analysis. This was further confirmed by linear regression analysis. The validity of data was checked by t-test statistical analysis. From this value of reaction order, activation energy (E), and pre-exponential factor (Z) were calculated. It was found that the activation energy increased with the addition of liquid elastomer.

Keywords

Diglycidyl Ether of Bis-Phenol-A, Cycloaliphatic Epoxy Resin, Carboxyl Terminated Butadiene Acrylonotrile (CTBN) Copolymer, Thermogravimetric Analysis (TGA), Degradation Kinetics

Conflicts of Interest

The authors declare no conflicts of interest.

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