고기능 고분자 복합재의 고상계면 현상에 대한 연구(I)-액정 Polyester와 Poly(e-caprolactam) Alloy의 제조와 그 특성

강두환; 강호종; 정효성; 이용무

Journal of the Korean Industrial and Engineering Chemistry, Vol.8, No.1, 49-58, February, 1997

Solid State Interfacial Phenomena of High Performance Two Phase Polymer System(I)-Preparation and Characteristics of Liquid Crystalline Polyester and Poly(ε-caprolactam) Alloy-

강두환, 강호종, 정효성, 이용무

초록

고탄성, 고강도의 특성을 가지고 있는 열방성 액정고분자인 Vectra(LCP)와 무정형 poly(ε-caprolactam) (PA)의 합금에서 LCP의 함량이 10parts 미만에서는 LCP의 네마틱 상의 유리전이온도가 4∼5℃ 정도 낮은 족으로 이동되나 그 이상의 함량에서는 유리전이온도의 이동을 볼 수 없는 것으로 보아 부분적인 상용성만 나타나게 됨을 확인하였다. PA/LCP 합금에서 LCP의 함량을 증가시켜 주기위해 N-g1ycinylmaleimide(GMI)를 합성한 다음 이를 methyl-metacrylate(MMA)와 공중합시켜 poly(glycinylmaleimide-co-methylmetacrylate)[poly(GMI-co-MMA)]공중합체를 합성하고 이를 상용화제로 사용하였으며 이를 사용하는 경우 LCP 30parts 이상을 혼합하여도 혼화성이 있음을 알 수 있었고 이들 합금의 상용성은 합금의 각종 혼합비율에 따른 열적 특성과 rheological 특성을 측정하여 확인하고 고속충격특성과 굴곡강도 및 탄성율을 측정하였다.

LCP/PA alloy was prepared by blending poly(ε-caprolactam) (PA) with liquid crystal polyester, Vectra (LCP) having high elasticity and strength. The alloy prepared amorphous PA with more than 10 parts of thermotropic LCP had poor compatibility. To increase the compatibility of the alloy, compatibilizing agent, poly(glycinylmaleimide-co-methylmetacrylate)[poly(GMI-co-MMA)] copolymer was prepared by copolymerizing N-glycinylmaleimide(GMI) with methylmetacrylate(MMA). And then, it was blended with LCP and PA to produce LCP/PA alloy having an excellent compatibility. The compatibility characteristics of the alloy prepared from LCP and PA uslng the poly(GMI-co-MMA) was determined by measuring the thermal characteristics of glass transition temperature of nematic LCP, and rheological properties, and also high rate impact and flexual characteristics of the alloy were determined.

[References]

deGennes PG, J. Chem. Phys., 55, 572 (1971)
Edward SF, Proc. Phys. Soc. London, 92, 9 (1967)
Kang DW, Lee YM, Jung NJ, Preprint of 4th Pacific Polym. Conf., 454 (1995)
Harry J, Kozlowski C, Sherwood PMA, J. Mater. Sci., 22, 1585 (1987)
Mujin S, Baorong H, Sheng WY, Compos. Sci. Technol., 34, 353 (1989)
Kumins CA, Rotman T, J. Polym. Sci. A: Polym. Chem.(1), 527 (1963)
Lee MK, Kim KU, Moon TJ, Polym.(Korea), 15(6), 678 (1991)
Wool KP, ACS Polym. Prepr., 23, 62 (1982)
Oishi T, Kamori A, Fujimoto M, J. Macromol. Sci.-Pure Appl. Chem., A29, 231 (1992)
Oishi T, Kagawa K, Fujimoto M, Macromolecules, 26, 24 (1993)
Luo LH, Han CD, Mijovic S, J. Appl. Polym. Sci., 28, 3387 (1983)
Saini DR, Shenoy AV, Nadkarni VM, Polym. Eng. Sci., 25, 807 (1985)

[1] deGennes PG, J. Chem. Phys., 55, 572 (1971)

[2] Edward SF, Proc. Phys. Soc. London, 92, 9 (1967)

[3] Kang DW, Lee YM, Jung NJ, Preprint of 4th Pacific Polym. Conf., 454 (1995)

[4] Harry J, Kozlowski C, Sherwood PMA, J. Mater. Sci., 22, 1585 (1987)

[5] Mujin S, Baorong H, Sheng WY, Compos. Sci. Technol., 34, 353 (1989)

[6] Kumins CA, Rotman T, J. Polym. Sci. A: Polym. Chem.(1), 527 (1963)

[7] Lee MK, Kim KU, Moon TJ, Polym.(Korea), 15(6), 678 (1991)

[8] Wool KP, ACS Polym. Prepr., 23, 62 (1982)

[9] Oishi T, Kamori A, Fujimoto M, J. Macromol. Sci.-Pure Appl. Chem., A29, 231 (1992)

[10] Oishi T, Kagawa K, Fujimoto M, Macromolecules, 26, 24 (1993)

[11] Luo LH, Han CD, Mijovic S, J. Appl. Polym. Sci., 28, 3387 (1983)

[12] Saini DR, Shenoy AV, Nadkarni VM, Polym. Eng. Sci., 25, 807 (1985)