Abstract
The effects of addition of the 3rd component of thermotropic liquid crystal polymer (TLCP) on the mechanical properties and structure of Vectra A-reinforced polycarbonate (PC) were studied. The 3rd TLCP was the copolymer of p-hydroxybenzoate (PHB) and ethyleneterephthalate, known as X-7G TLCP. PC, Vectra A, and a small amount of the 3rd TLCP were blended in the molten state, the extrudate of which was cut and injection-molded. The mechanical properties of the blends were improved dramatically by addition of a small amount of the 3rd TLCP component. SEM revealed that the blend systems were always phase-separated, even after injection-molded, and the fibrils of Vectra A in the injection-molded blends became finer and longer in the presence of the 3rd TLCP. FT-IR indicated that no special chemical reaction took place between the TLCP and PC. The dynamic viscoelastic analysis indicated that the addition of the 3rd TLCP component had almost no effect on the thermal endurance of the blends. X-Ray diffraction analysis showed that the orientation of Vectra A fibril in the blend became higher when the 3rd TLCP was added, which led to the great improvement of the mechanical properties. Based on the assumption of additivity law, the fibril modulus was evaluated and found to be in the same order as the orientation evaluation by X-ray diffraction. The thinning of fibrils by addition of the 3rd TLCP component was discussed based on the crystallization kinetics of rodlike molecules.
Similar content being viewed by others
Article PDF
References
G. Kiss, Polym. Eng. Sci., 27 (6), 410 (1987).
A. I. Isayev and M. Modic, Polym. Composites, 8, 158 (1987).
W. Brostow, T.S. Dziemianowicz, J. Romanski, and W. Werber, Polym. Eng. Sci., 28 (12), 785 (1988).
M. Takayanagi, T. Ogata, M. Morikaga, and T. Kai, Macromol. Sci. Phys., B17, 591 (1980).
Y. Shin and I. J. Chung, Polym. Eng. Sci., 30, 124 (1990).
Y. Nagano, M. Makino, H. Yamane, Y. Kimura, and T. Kitao, Kobunshi Ronbunshu, 49, 653 (1992).
M. Kimura and R.S. Porter, J. Polym. Sci., Polym. Phys. Ed., 22, 1697 (1984).
J. Suenaga, E. Fujita, and T. Marutani, Kobunshi Ronbunshu, 48, 573 (1991).
L. Mantia, A. Valenza, and L. Maganini, J. Appl. Polym. Sci., 44, 1257 (1992).
T. Harada, A. Ohara, K. Tomari, S. Tonogai, S. Nagai, and K. Yamaoka, The 6th SPE JAPAN RETEC Technical Papers, 1988, p 15.
M. R. Nobile, E. Amendola, L. Nicolais, D. Acierno, and C. Carfagna, Polym. Eng. Sci., 29, 244 (1989).
A. Kohli, N. Chung, and R. A. Weiss, Polym. Eng. Sci., 29, 573 (1989).
T. M. Malik, P. J. Carreau, and N. Chapleau, Polym. Eng. Sci., 29, 600 (1989).
Y. Nagano, H. Yamane, Y. Kimura, and T. Kitao, Kobunshi Ronbunshu, 48, 381 (1991).
M. Komada, Kobunshi Ronbunshu, 48, 817 (1991).
M. Kimoto and T. Hiraguchi, Kobunshi Ronbunshu, 49, 105 (1992).
B. Y. Shin and I. J. Chung, Polym. J., 21, 851 (1989).
M. R. Kamal, O. Khennache, and S. K. Goyal, Polym. Eng. Sci., 29, 1089 (1989).
J. I. Lauritzen and J. D. Hoffmen, J. Res. NBS, 64A, 73 (1960).
T. Oyama, personal communication.
X.-C. Fa and T. Takahashi, Sen-i Gakkaishi, 46, 49 (1990).
T. Takayanagi, Mem. Fac. Eng. Kyushu Univ., 23, 1 (1963).
K. Nakamae, T. Nishino, Y. Shimizu, and T. Matsumoto, Polym. J., 19, 451 (1987).
P. Zhuang, T. Kyu, and J. L. White, Polym. Eng. Sci., 28, 1095 (1988).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sun, LM., Sakamoto, T., Ueta, S. et al. Additive Effects on Thermotropic Liquid Crystal Polymer Alloys I. Effects of Third Component of Thermotropic Liquid Crystal Polymer on Mechanical Properties of Vectra A-Reinforced Polycarbonate. Polym J 26, 939–952 (1994). https://doi.org/10.1295/polymj.26.939
Issue Date:
DOI: https://doi.org/10.1295/polymj.26.939
Keywords
This article is cited by
-
Effects of annealing on structure and properties of TLCP/PEN/PET ternary blend fibers
Macromolecular Research (2003)