The influence of the black seed oil modified epoxy resin (EBSO)/monomer 3,4-epoxycyclohexylmethyl 3,4- epoxycyclohexane carboxylate (BCDE) weight ratio in the coatings based on the compounds and photoinitiator triarylsulfonium hexafluoroantimonate (TAS) on thermal properties of photocrosslinked coatings have been studied. The chemical structure of investigated UV-cured coatings was characterized by IR spectrometric analysis. Their thermogravimetric (TG) and differential scanning calorimetry (DSC) behavior were determined by TG and DSC analysis, respectively. | Cite this paper Vietnam J. Chem. 2023 61 6 732-740 Research Article DOI Influence of the black seed oil modified epoxy resin biscycloaliphatic epoxide monomer weight ratio on thermal properties of photocrosslinked coatings Nguyen Tien Dung2 Le Xuan Hien1 Do Minh Thanh1 1 Institute for Tropical Technology ITT Vietnam Academy of Science and Technology VAST 18 Hoang Quoc Viet Cau Giay Hanoi 10000 Viet Nam 2 Hanoi National University of Education 136 Xuan Thuy Cau Giay Hanoi 10000 Viet Nam Submitted November 3 2022 Revised March 24 2023 Accepted June 5 2023 Abstract The influence of the black seed oil modified epoxy resin EBSO monomer 3 4-epoxycyclohexylmethyl 3 4- epoxycyclohexane carboxylate BCDE weight ratio in the coatings based on the compounds and photoinitiator triarylsulfonium hexafluoroantimonate TAS on thermal properties of photocrosslinked coatings have been studied. The chemical structure of investigated UV-cured coatings was characterized by IR spectrometric analysis. Their thermogravimetric TG and differential scanning calorimetry DSC behavior were determined by TG and DSC analysis respectively. It was shown that the testing atmosphere had almost no effect to the form of TG DTG curves and little effect on value of weight degradation of investigated coatings. The volatilization of low molecular weight compounds was observed in the range from room temperature to 360oC while the thermal degradation of the coatings occurred in the range from 360 to oC. The augmentation of the EBSO BCDE weight ratio from 20 80 to 80 20 led to an increase of the degradation temperatures in the nitrogen atmosphere extreme character of weight loss variation as well as the reduction of glass transition temperatures of the coatings from Tg1 and 83oC Tg2 to Tg1 and Tg2 correspondingly. Keywords. UV- cured coatings thermal properties epoxy resin modified by black seed oil. 1. INTRODUCTION flexible chains. Aromatic and heterocyclic .
