Cure Behavior and Thermal Stability of Difunctional/Trifunctional Epoxy Blend System Initiated by Thermal Latent Catalyst

열잠재성 촉매 개시제를 이용한 2관능성/3관능성 에폭시 블렌드계의 경화거동 및 열안정성

  • Park, Soo-Jin (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Taek-Jin (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Lee, Jae-Rock (Advanced Materials Division, Korea Research Institute of Chemical Technology)
  • 박수진 (한국화학연구소 화학소재연구부) ;
  • 김택진 (한국화학연구소 화학소재연구부) ;
  • 이재락 (한국화학연구소 화학소재연구부)
  • Received : 1999.07.28
  • Accepted : 1999.09.30
  • Published : 1999.11.10

Abstract

Cure behavior and thermal stability of the different ratio of diglycidylether of bisphenol A(DGEBA)/trimethylolpropane triglycidylether(TMP) epoxy blends initiated by 1 wt % N-benzylpyrazinium hexafluoroantimonate (BPH) as a cationic latent catalyst were studied using DSC and TGA, respectively. Latent properties were performed by measurement of the conversion as a function of temperature using dynamic DSC. Dynamic DSC thermograms of DGEBA/TMP blends revealed that the weak peak was formed by complex formation between the hydroxyl groups in DGEBA and BPH, and between epoxides and BPH in low temperature ranges. The strong peak was considered as an exothermic reaction by the formation of three-dimensional network in high temperature ranges. Isothermal DSC revealed that the reaction rate of the blends was found to be higher than that of the neat TMP. The thermal stabilities in the cured resins were increased with increasing the DGEBA content. These results could be interpreted in terms of the stable aromatic structure, existence of hydroxyl group and high molecular weight of DGEBA.

References

  1. ACS Advances in Chemistry Series No. 114 Epoxy Resin Chemistry R. S. Bauer
  2. Handbook of Epoxy Resins H. Lee;K. Nevile
  3. Polymer v.37 L. Jayle;C. B. Bucknall;I. K. Partridge;J. N. Hay;A. Fernyhough;I. Nozue
  4. Polymer v.37 S. Zheng;J. Wang;Q. Guo;J. Wei;J. Li
  5. Polymer v.40 J. He;D. Ragharan;D. Hoffman;D. Hunston
  6. Epoxy Resin C. A. May
  7. The Epoxy Resin Formulators Training Manual R. L. Wheeler
  8. Macromol. Symp. v.93 E. Espuche;J. Galy;J. F. Gerard;J. P. Pascault;H. Sautereau
  9. J. Appl. Polym. Sci. v.30 J. Gu;S. C. Narang;E. L. Pearce
  10. Polym. J. v.29 Y. C. Kim;S. J. Park;J. R. Lee
  11. J. Polym. Sci., Polym. Chem. v.27 H. Uno;T. Takata;T. Endo
  12. Polym. Compo. v.18 J. A. McGowen;L. J. Mathias
  13. J. Polym. Sci., Polym. Chem. v.32 L. Matejka;P. Chabanne;L. Tighzert;J. P. Pascault
  14. Principles of Polymerization(3rd Ed.) J. Odian
  15. Polym. Eng. Sci. v.27 H. H. Winter
  16. Anal. Chem. v.60 D. N. Waters;L. P. John
  17. J. Polym. Sci. v.3 L. H. Lee
  18. Anal. Chem. v.35 H. H. Horowitz;G. Metzger
  19. J. Appl. Polym. Sci. v.62 D. Derouet;F. Morvan;J. C. Brosse