폴리에스테르이미드 공중합체의 용융 및 결정화 거동

박이순; 황진상; 이동찬; 하기룡

Polymer(Korea), Vol.19, No.4, 488-494, July, 1995

Export Citation

폴리에스테르이미드 공중합체의 용융 및 결정화 거동

Melting and Crystallization Behavior of Poly(ester-imide)s

박이순, 황진상, 이동찬, 하기룡

초록

에스테르 교환반응과 중축합 반응의 두 단계 반응으로 합성된 poly(butylene terephthalate-imide)s, PBI 공중합체들의 조성에 따른 용융 온도의 변화와 등온 결정화 거동을 DSC로 고찰하였다. 공중합체내 이미드 반복단위의 함량이 증가할수록 용융 온도(T_m)는 Flory's equation에 따른 감소를 보였으며 Flory Plot으로부터 구한 T_m⁰는 224.8℃, ΔH_u는 53.1J/g이었다. Avrami equation으로 고찰된 등온 결정화 거동에서 이미드 함량이 증가할수록 Avrami exponent n은 증가하였으며 결정성장 속도상수 K는 감소하였다.

Poly(butylene terephthalate-imide), PBI copolymers were synthesized by two-stage reaction, esterification and polycondensation. DSC was employed to investigate the changes of T_m's and isothermal crystallization kinetics. T_m's decreased in accordance with the Flory's equation as the content of imide repeat unit in the copolymer increased. T_m⁰ and ΔH_u from Flory plot were 224.8℃ and 53.1 J/g, respectively. In isothermal crystallization, Avrami exponent n increased and K decreased as the content of imide repeat unit in the copolymer increased.

Keywords:melting;crystallization kinetics;Flory plot;Avrami equation

[References]

Jadhav JY, Kantor SW, "Encyclopedia of Polym. Sci. and Eng.," 2nd Ed., Vol. 12, p. 75, p. 217, Wiley Interscience, New York (1985)
Cheng SZD, Pan R, Wunderlich B, Makromol. Chem., 189, 2443 (1988)
Runt J, Miley DM, Zhang X, Gallagher KP, McFeaters K, Fishburn J, Macromolecules, 25, 1929 (1992)
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Nichlos ME, Robertson RE, J. Polym. Sci. B: Polym. Phys., 30, 755 (1992)
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井上和夫, 高分子, 39, 104 (1990)
Dickinson PR, Sung CSP, Macromolecules, 25, 3751 (1992)
Feld WA, Ramalingam B, Harris FW, J. Polym. Sci. A: Polym. Chem., 22, 831 (1984)
U.S. Patent, 3,426,098 (1969)
U.S. Patent, 4,362,861 (1982)
Kishanprasad VS, Gedam PH, J. Appl. Polym. Sci., 48, 1151 (1993)
Kricheldorf HR, Pakull R, J. Polym. Sci. C: Polym. Lett., 23, 413 (1985)
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Hecht JL, Ford TM, ANTEC'85, p. 777
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[Referenced By]

[1] Jadhav JY, Kantor SW, "Encyclopedia of Polym. Sci. and Eng.," 2nd Ed., Vol. 12, p. 75, p. 217, Wiley Interscience, New York (1985)

[2] Cheng SZD, Pan R, Wunderlich B, Makromol. Chem., 189, 2443 (1988)

[3] Runt J, Miley DM, Zhang X, Gallagher KP, McFeaters K, Fishburn J, Macromolecules, 25, 1929 (1992)

[4] Onishi Y, Nakai T, Polym. J., 24(9), 833 (1992)

[5] Nichlos ME, Robertson RE, J. Polym. Sci. B: Polym. Phys., 30, 755 (1992)

[6] Marrs W, Peters RH, Still RH, J. Appl. Polym. Sci., 23, 1063 (1979)

[7] Kricheldorf HR, "Handbook of Polymer Synthesis," p. 941, Marcel Dekker Inc., New York (1992)

[8] 井上和夫, 高分子, 39, 104 (1990)

[9] Dickinson PR, Sung CSP, Macromolecules, 25, 3751 (1992)

[10] Feld WA, Ramalingam B, Harris FW, J. Polym. Sci. A: Polym. Chem., 22, 831 (1984)

[11] U.S. Patent, 3,426,098 (1969)

[12] U.S. Patent, 4,362,861 (1982)

[13] Kishanprasad VS, Gedam PH, J. Appl. Polym. Sci., 48, 1151 (1993)

[14] Kricheldorf HR, Pakull R, J. Polym. Sci. C: Polym. Lett., 23, 413 (1985)

[15] Mandelkern L, "Physical Properties of Polymers," p. 163, Am. Chem. Soc., Washington D.C. (1984)

[16] Hecht JL, Ford TM, ANTEC'85, p. 777

[17] Sperling LH, "Introduction to Physical Polymer Science," p. 182, John Wiley & Sons, Inc. (1986)