V.35,no.4,Dec 2023 https://doi.org/10.5764/TCF. Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2018 / V.30,no.3,Sept Title Effect of Stereoisomeric Structures of Curing Agents on Curing Behaviors, Thermal and Mechanical Properties of Epoxy Resins Authors Minkyu Lee, Woong Kwon and Euigyung Jeong* Institution/Affiliations Kyungpook National University Pages/Total page pp.180 ~ 189 / 10 Language Korean Abstract To study the effect of stereoisomeric structures of curing agents on curing behaviors, thermal and mechanical properties of epoxy resins, DGEBA(diglycidyl ether of bisphenol A) epoxy resin and 3,3'- and 4,4'-DDS(diaminodiphenyl sulfone) curing agents were selected. The curing initiation temperature and activation energy of DGEBA/3,3'- DDS was lower than DGEBA/4,4'-DDS. DGEBA/3,3'-DDS has a faster curing rate and higher degree of cure than DGEBA/4,4'-DDS, suggesting that 3,3'-DDS has higher reactivity than 4,4'-DDS. Tensile strength and fracture toughness of DGEBA/3,3'- DDS was lower than those of DGEBA/4,4'-DDS, indicating that mechanical properties of the epoxy resin can be different only by the stereoisomeric difference in chemical structure of the curing agent. Keywords DGEBA, 3,3', 4,4'-DDS, curing behavior, thermal stability, mechanical properties, fracture toughness Download   Reference http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OSGGBT_2018_v30n3_180&ordernum=