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http://dx.doi.org/10.5764/TCF.2021.33.2.79

Effect of a Pigment Addition on Mechanical Properties of Epoxy Resin  

Kwon, Woong (Department of Textile System Engineering, Kyungpook National University)
Han, Minwoo (Department of Textile System Engineering, Kyungpook National University)
Kim, Changkyu (Department of Textile System Engineering, Kyungpook National University)
Park, Sungmin (Department of Textile System Engineering, Kyungpook National University)
Jeong, Euigyung (Department of Textile System Engineering, Kyungpook National University)
Publication Information
Textile Coloration and Finishing / v.33, no.2, 2021 , pp. 79-86 More about this Journal
Abstract
This study investigated the effect of a pigment (C. I. Pigment Red 122) addition on mechanical properties of the epoxy resin, diglycidyl ether of bisphenol F (DGEBF) and G640 curing agent. The K/S value, thermal properties, tensile properties, and fracture toughness of the prepared epoxy samples were evaluated. When the pigment was added to the DGEBF/G640 epoxy system, the color of the epoxy resin changed to red from transparent and yellowish color, and the K/S value in the red region increased as the pigment content increased. When the pigment content was increased up to 0.1 phr, the tensile strength was improved up to 21.8 %, whereas the pigment content was over 0.1 phr, the tensile strength decreased. The fracture toughness was improves up to 23.1 % until the amount of pigment added was up to 0.2 phr, and then decreased when the amount of the pigment added was more than 0.2 phr. This attributed to the aggregation of the pigments in the epoxy resin when the amount of the pigment added was more than 0.2 phr. Therefore, the coloration of the epoxy resin with an organic pigment must be carried out very carefully because the coloration of epoxy resin affects its mechanical properties.
Keywords
epoxy resin; coloration; pigment; thermal properties; tensile properties;
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