Thermal Decomposition Characteristics of Epoxy Network Chemically Toughened with Liquid Rubber Using Dynamic TG Analysis

Jae-young Lee; Hong-Ki Lee; Mi-ja Shim; Sang-Wook KIm

Journal of Industrial and Engineering Chemistry, Vol.6, No.4, 250-255, July, 2000

Jae-young Lee, Hong-Ki Lee¹, Mi-ja Shim², and Sang-Wook KIm^†

Department of Chemical Engineering, The University of Seoul, Seoul 130-743, Korea
¹Department of Chemical Engineering, Woosuk University, Wanju 565-701, Korea
²Department of Life Science, The University of Seoul, Seoul 130-743, Korea

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The thermal decomposition kinetics of diglycidyl ether of bisphenol A (DGEBA)/4,4''-methylene dianiline (MDA)/rubber-mokified MDA system was studied using Flynn & Wall expression. The thermal decomposition data of a cured DGEBA/MDA (30 phr) system with MDA-endcapped CTBN (0, 10 and 20 phr) were analyzed using thermogravimetirc anayzer (TGA). The activation energy over the range of 0.1-0.4 was almost constant, however that of α= 0.05 was far lower. This means that the thermal decomposition at α=0.05 is affected by the volatilization of the unreacted molecules or moisture, the gaseous product emission after the chemical session.

Keywords:thermal decomposition;epoxy;CTBN;TGA;Flynn & Wall expression

[References]

Day M, Cooney JD, Wiles DM, J. Appl. Polym. Sci., 38, 323 (1989)
Flynn JH, Polym. Eng. Sci., 20, 675 (1980)
Stivala SS, Kimura J, Gabbay SM, Degradation and Stabilisation of Polyolefins, N.S. Allen Ed., ch. 3, Applied Science Publishers LTD, London (1983)
Freeman ES, Carroll B, J. Phys. Chem., 62, 394 (1958)
Lee JY, Choi HK, Shim MJ, Kim SW, Thermochim. Acta, 52, 272 (1998)
Lee JY, Shim MJ, Kim SW, Mater. Chem. Phys., 44, 74 (1996)
Lee JY, Choi HK, Shim MJ, Kim SW, J. Ind. Eng. Chem., 4(1), 7 (1998)
Pavia DL, Lampman GM, Kriz GS, Introduction to Spectroscopy: A Guide for Students of Organic Chemistry, p. 46, W.B. Saunders Company, Philadelphia, London, Toronto (1979)
Varhegyi G, Thermochim. Acta, 110, 95 (1987)
Derouet D, Morvan F, Brosse JC, J. Appl. Polym. Sci., 62(11), 1855 (1996)

[Referenced By]

[1] Day M, Cooney JD, Wiles DM, J. Appl. Polym. Sci., 38, 323 (1989)

[2] Flynn JH, Polym. Eng. Sci., 20, 675 (1980)

[3] Stivala SS, Kimura J, Gabbay SM, Degradation and Stabilisation of Polyolefins, N.S. Allen Ed., ch. 3, Applied Science Publishers LTD, London (1983)

[4] Freeman ES, Carroll B, J. Phys. Chem., 62, 394 (1958)

[5] Lee JY, Choi HK, Shim MJ, Kim SW, Thermochim. Acta, 52, 272 (1998)

[6] Lee JY, Shim MJ, Kim SW, Mater. Chem. Phys., 44, 74 (1996)

[7] Lee JY, Choi HK, Shim MJ, Kim SW, J. Ind. Eng. Chem., 4(1), 7 (1998)

[8] Pavia DL, Lampman GM, Kriz GS, Introduction to Spectroscopy: A Guide for Students of Organic Chemistry, p. 46, W.B. Saunders Company, Philadelphia, London, Toronto (1979)

[9] Varhegyi G, Thermochim. Acta, 110, 95 (1987)

[10] Derouet D, Morvan F, Brosse JC, J. Appl. Polym. Sci., 62(11), 1855 (1996)