Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Cure Behavior of a DGEBF Epoxy using Asymmetric Cycloaliphatic Amine Curing Agent

비대칭 고리형 지방족 아민 경화제를 이용한 DGEBF 계열 에폭시의 경화 거동

  • Kim, Hongkyeong (Department of Polymer Science and Engineering, Chungju National University)
  • 김홍경 (충주대학교 고분자공학과)
  • Received : 2007.12.06
  • Accepted : 2008.01.02
  • Published : 2008.02.28
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Abstract

The curing kinetics of diglycidyl ether of bisphenol F (DGEBF) with an asymmetric cycloaliphatic amine curing agent were examined by thermal analysis in both isothermal and dynamic curing conditions. From the residual curing of the samples partially cured in isothermal condition and from the dynamic curing with various heating rates, it was found that there exist two kinds of reactions such as at low temperature and at high temperature regions. It was thus also found that the cure parameters obtained from the isothermal curing kinetic model hardly estimate experimental results for a degree of cure larger than 0.6. The activation energies and frequency factors of these two kinds of reactions were obtained from the dynamic curing experiments with various heating rates. From the curing analysis, it was verified that the total cure kinetics for low degrees of cure is dominated by the cure reaction in the low temperature region.

비대칭성 고리형 지방족 아민 경화제를 이용한 diglycidyl ether of bisphenol F(DGEBF) 계열의 에폭시의 경화 반응을 등온 및 동적 경화 실험을 통하여 분석하였다. 등온 부분경화 실험 및 동적 경화반응을 통하여 아민 경화제의 비대칭성으로 인해 경화 반응이 저온부 및 고온부분의 두 가지 반응으로 구성되어 있다는 것을 확인하였고, 따라서 경화도가 0.6 이상인 영역에서는 등온경화반응 모델식을 이용하여 실험값을 예측하기는 어렵다는 것을 확인하였다. 승온 속도를 여러 가지로 변화시키며 동적 경화반응을 분석하여 저온부 및 고온부 각각의 반응에 대한 활성화에너지 및 속도상수를 알아보았고, 경화 초기에는 저온부의 반응이 주가 되는 것을 확인하였다.

Keywords

References

  1. May, C. A. (Ed.), Epoxy resins. Chemistry and Technology, Marcel Dekker, New York(1988).
  2. Rozenberg, B. A., "Kinetic, Thermodynamics and Mechanism of Reactions of Epoxy Oligomers with Amines," Adv. in Polym. Sci., 75, 113(1985).
  3. Gonzalez-Romero, V. M. and Casillas, N., "Kinetic Characterization of Thermosets from Isothermal and Dynamic Data," ANTEC 87, 1119(1987).
  4. Girard-Reydet, E., Riccardi, C. C., Sautereau, H. and Pascault, J. P., "Epoxy-Aromatic Diamine Kinetics. 1. Modeling and Influence of the Diamine Structure," Macromolecules, 28(23), 7599(1995). https://doi.org/10.1021/ma00127a003
  5. Lee, S.-N. and You, W. B., "Cure Kinetics of An Epoxide/Anhydride/ Amine Resin System: A Fractional-Life Method Approach", Polym. Eng. Sci., 27(17), 1317(1987). https://doi.org/10.1002/pen.760271708
  6. Wise, C. W., Cook, W. D. and Goodwin, A. A., "Chemico-Diffusion Kinetics of Model Epoxy-Amine Resins, " Polymer, 38(13), 3251(1997). https://doi.org/10.1016/S0032-3861(96)00882-8
  7. Huguenin, F. G. A. E. and Klein, M. T., "Intrinsic and Transportlimited Epoxy-Amine Cure Kinetics," Ind. Eng. Chem. Proc. Res. Dev., 24(1), 166 (1985). https://doi.org/10.1021/i300017a031
  8. Deng, Y. and Martin, G. C., "Diffusion and Diffusion-Controlled Kinetics During Epoxy-Amine Cure," Macromolecules, 27(18), 5147 (1994). https://doi.org/10.1021/ma00096a043
  9. Kim, B. S., Chiba, T. and Inoue, T., "A New Time-temperaturetransformation Cure Diagram for Thermoset/Thermoplastic Blend: Tetrafunctional Epoxy/Poly(Ether Sulfone)," Polymer, 34(13), 2809(1993) https://doi.org/10.1016/0032-3861(93)90125-T
  10. Aronhime, M. T. and Gillham, J. K., "Time-Temperature Transformation (TTT) Cure Diagram of Thermosetting Polymeric Systems", Adv. in Polym. Sci., 78, 83(1986). https://doi.org/10.1007/BFb0035358
  11. Yee, A. F. and Pearson, R. A., "Toughening Mechanisms in Elastomer- Modified Epoxies: Part 1 Mechanical Studies," J. Mater. Sci., 21(7), 2462(1986). https://doi.org/10.1007/BF01114293
  12. Pearson, R. A. and Yee, A. F., "Toughening Mechanisms in Elastomer- Modified Epoxies : Part 2 Microscopy Studies," J. Mater. Sci., 21(7), 2475(1986). https://doi.org/10.1007/BF01114294
  13. Barton, J. M., "Kinetics of Cure of Epoxy Resin System Bisphenol- A Diglycidylether-di(4-Aminophenyl)Sulphone", Polymer, 21(6), 603(1980). https://doi.org/10.1016/0032-3861(80)90314-6
  14. Camargo, R. E., Gonzalez, V. M. and Macosko, C. W., "Bulk Polymerization Kinetics by the Adiabatic Reactor Method," Rubber Chem. Tech., 56(4), 774(1983). https://doi.org/10.5254/1.3538154
  15. Hatakeyama, T. and Liu, Z. (Ed.), Handbook of Thermal Analysis, John Wiley & Sons, New York, 48(1998).