물을 함유한 아크릴 중합체의 용융 및 용융점도 거동

오영세; 오세천; 김병규

Korean Journal of Rheology, Vol.5, No.2, 136-143, December, 1993

Export Citation

물을 함유한 아크릴 중합체의 용융 및 용융점도 거동

Melting and Melt Viscosity Behavior of Wet-PAN Systems

오영세, 오세천, 김병규

초록

PDSC(pressurized differential scanning calorimeter)를 이용하여 물 또는 물-MDF(N,N-dimethylformamide)혼합물을 함유한 아크릴로니트릴 중합체(wet-PAN)의 융점거동을 조사하였으며, wet-PAN 용융체의 점도 측정에 적합한 모세관형 점도계를 제작하여 전단속도 및 온도에 따른 점도변화를 고찰하였다. 물에 의한 wet-PAN의 융점 및 용융점도는 물의 함량이 증가함에 따라 점근적으로 감소하여 25 wt% 이상에서는 거의 일정하였다. 또한 물(25 wt% 기준)의 일부를 DMF로 대체하였을 경우에는 융점이 감소하였다. 한편 wet-PAN의 용융점도는 power-law거동에 준하였으며 물계에서는 power-law 지수(n)가 0.16(190℃)∼0.18(170℃)인데 비하여 물(95)∼DMF(5) 혼합물계에서는 0.24(175℃)∼0.25(165℃)로서 점도의 전단담화거동이 약해졌으나, 흐름의 활성화에너지는 다소 증가하였다.

The melting behavior and melt viscosity of wet-PAN, containing water of water-DMF mixture, were investigated using a PDSC (pressurized differential scanning calorimeter) and a capillary type viscometer, respectively. Melting temperature (T_m) and melt viscosity of wet-PAN were decreased with increasing water content up to about 25 wt%, beyond which, however, both T_m and viscosity remained almost constant. Melt viscosity of wet-PAN was well fitted to a power-law model with power law index(n) ranging 0.16(190℃)∼0.18(170℃) for water, and 0.24(175℃)∼0.25(165℃) for water(95)∼DMF(5) system.

Keywords:Polyacrylonitrile;Melting temperature;Melt viscosity;Capillary viscometer

[References]

Bohn CR, Schaefgen JR, Statton WO, J. Polym. Sci., 55, 531 (1961)
Klement J, Geil P, J. Polym. Sci., 6, 1381 (1968)
Warner SB, Polym. Lett., 16, 287 (1978)
Grassie N, McGuchan R, Eur. Polym. J., 9, 1277 (1970)
Bahl OP, Manacha LM, Carbon, 13, 297 (1975)
Mathar RB, Bahl PP, Gupta D, Fiber Sci. Technol., 21, 223 (1984)
Grassie N, Hay JM, J. Polym. Sci., 56, 189 (1962)
Frushour BG, Polym. Bull., 4, 375 (1984)
Frushour BG, Polym. Bull., 11, 375 (1984)
U.S. Patent, 3,896,204 (1975)
Daumit GP, Ko YS, Slater CR, Venner JG, Wilson DW, Young CC, Zabaleta H, 20th Int. SAMPLE Tech. Conf., Sept., 27 (1988)
U.S. Patent, 3,984,601 (1976)
U.S. Patent, 3,991,153 (1978)
U.S. Patent, 4,461,739 (1989)
Euro. Patent, 0 355 764 (1989)
Tadmor Z, Gogos CG, "Principles of Polymer Processing," John Wiley & Sons, New York, p. 176-178 (1979)
Bagley EB, J. Appl. Polym. Sci., 28, 624 (1957)
Han CD, "Rheology in Polymer Processing," Academic Press, New York, p. 89-116 (1976)
Henrici-Olive G, Olive S, Adv. Polym. Sci., 32, 123 (1979)
Min BG, Son TW, Kim BC, Jo WH, Polym. J., 24(9), 841 (1992)
Frushour BG, Polym. Bull., 7, 1 (1982)
Han CD, Trans. Soc. Rheol., 17, 375 (1973)

[1] Bohn CR, Schaefgen JR, Statton WO, J. Polym. Sci., 55, 531 (1961)

[2] Klement J, Geil P, J. Polym. Sci., 6, 1381 (1968)

[3] Warner SB, Polym. Lett., 16, 287 (1978)

[4] Grassie N, McGuchan R, Eur. Polym. J., 9, 1277 (1970)

[5] Bahl OP, Manacha LM, Carbon, 13, 297 (1975)

[6] Mathar RB, Bahl PP, Gupta D, Fiber Sci. Technol., 21, 223 (1984)

[7] Grassie N, Hay JM, J. Polym. Sci., 56, 189 (1962)

[8] Frushour BG, Polym. Bull., 4, 375 (1984)

[9] Frushour BG, Polym. Bull., 11, 375 (1984)

[10] U.S. Patent, 3,896,204 (1975)

[11] Daumit GP, Ko YS, Slater CR, Venner JG, Wilson DW, Young CC, Zabaleta H, 20th Int. SAMPLE Tech. Conf., Sept., 27 (1988)

[12] U.S. Patent, 3,984,601 (1976)

[13] U.S. Patent, 3,991,153 (1978)

[14] U.S. Patent, 4,461,739 (1989)

[15] Euro. Patent, 0 355 764 (1989)

[16] Tadmor Z, Gogos CG, "Principles of Polymer Processing," John Wiley & Sons, New York, p. 176-178 (1979)

[17] Bagley EB, J. Appl. Polym. Sci., 28, 624 (1957)

[18] Han CD, "Rheology in Polymer Processing," Academic Press, New York, p. 89-116 (1976)

[19] Henrici-Olive G, Olive S, Adv. Polym. Sci., 32, 123 (1979)

[20] Min BG, Son TW, Kim BC, Jo WH, Polym. J., 24(9), 841 (1992)

[21] Frushour BG, Polym. Bull., 7, 1 (1982)

[22] Han CD, Trans. Soc. Rheol., 17, 375 (1973)