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Effect of Stereoisomeric Structures of Curing Agents on Curing Behaviors, Thermal and Mechanical Properties of Epoxy Resins

  • Textile Coloration and Finishing
  • Abbr : Text. Color. and Finish.
  • 2018, 30(3), pp.180-189
  • DOI : 10.5764/TCF.2018.30.3.180
  • Publisher : The Korean Society Of Dyers And Finishers
  • Research Area : Engineering > Fiber Engineering > Dyeing Engineering
  • Received : July 17, 2018
  • Accepted : August 9, 2018
  • Published : September 27, 2018

Minkyu Lee 1 Woong Kwon 1 Jeong Eui gyung 1

1경북대학교 섬유시스템공학과

Accredited

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.

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