Effects of Chemical Reaction on the Properties of Reactive Blends between Poly(butylene terephthalate) and Liquid Crystalline Polymer

Kil SB; Park OO; Yoon KH; Hwang CI

Korea Polymer Journal, Vol.5, No.3, 145-151, September, 1997

Kil SB, Park OO, Yoon KH, Hwang CI

In order to understand the effects of chemical reaction on the properties of the reactive blend prepared by the melt-phase reaction of poly(butylene terephthalate) and liquid crystalline polymer(LCP), the crystallizaion behavior, complex viscosity and the molecular weight of the blends were studied. Because of the hindered crystallization due to the presence of the melt phase LCP, the crystallizaion temperature of the PBT/LCP blend decreased with increasing LCP content. The trans esterification reaction had no effect on the crystallizaion behavior and complex viscosity, except for A2 sample (PBT90/LCP10 reactive blend at 260℃ for 1 hour) and B2 sample (PBT70/LCP30 reactive blend at 260℃ for 1 hour). The reactive blends showed the fast crystallization due to annealing and increased the molecular weight due to the end-to-end reaction.

[References]

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[1] Escala A, Balizer E, Stein RS, Polym. Prepr., 19, 152 (1978)

[2] Kimura M, Porter RS, J. Polym. Sci. B: Polym. Phys., 22, 1697 (1984)

[3] Jackson WJ, Kuhfuss HF, J. Polym. Sci. A: Polym. Chem., 14, 2043 (1976)

[4] Devaux J, Godard P, J. Polym. Sci. B: Polym. Phys., 20, 1901 (1982)

[5] Paci CM, Barone C, J. Polym. Sci. B: Polym. Phys., 25, 1697 (1984)

[6] Brostow W, Dziemianowicz T, Romanski J, Werber W, Polym. Eng. Sci., 28, 785 (1988)

[7] Friedrich K, Hess M, Kosfeld R, Makromol. Chem. Macromol. Symp., 16, 251 (1988)

[8] Hwang CI, Kil SB, Park OO, Advanced New Mat'l, Emerging New Tech., p. 93 (1995)

[9] Zaldua A, Munoz E, Pena JJ, Santamaria A, Polymer, 32, 682 (1991)

[10] Han CD, Multiphase Flow in Polymer Processing Academic Press, New York (1981)

[11] Hwang CI, Park OO, Polym. J., 27, 232 (1995)

[12] Joseph E, wilkes GL, Baird DG, Polymer, 26, 689 (1985)

[13] Jang SH, Kim BS, Polym. Eng. Sci., 35(6), 538 (1995)