| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.237 |
| 발표분야 | 고분자 가공/블렌드 |
| 제목 | Heat Distortion Temperature and Mechanical Properties of TLCP/PBT Composites with Structural Development |
| 초록 | Polymer composites consisting of thermotropic liquid crystal polymer (TLCP) and conventional thermoplastics have been widely investigated because they exhibited excellent mechanical properties, high thermal stability, and good processability, resulting in their potential application for high performance polymers.1-7 Poly(butylene terephthalate) (PBT) has been used as the structural materials in the automotive, electrical, and electronic industries due to its high mechanical strength and good processability. The heat distortion temperature (HDT) represents the upper limit of dimensional stability of engineering plastics without physical deformation under load and thermal effect. The HDT makes it possible to characterize physical performance of polymer composites at elevated temperature, which is related to mechanical behaviors of polymer composites. In this research, polymer composites based on TLCP and PBT were prepared by a melt blending process, and effects of TLCP on physical properties of TLCP/PBT composites were investigated. The improvement in HDT and mechanical properties with structural development of TLCP/PBT composites was discussed. Thermal stability of TLCP/PBT composites was improved on the addition of TLCP component, suggesting that TLCP acted as an effective thermal stabilizer. Mechanical properties of TLCP/PBT composites were increased with TLCP content, which was attributed to the reinforcement effect of PBT matrix by TLCP component. As shown in Figure 1, TLCP/PBT composites that cooled slowly exhibited sharper diffraction peaks than quenched composites, which indicated the formation of larger and more regular crystallites in the composites. The HDT of TLCP/PBT composites with TLCP content are shown in Figure 1. The HDT values of TLCP/PBT composites increased with increasing TLCP content, which was related to the increase in flexural modulus of composites by incorporating TLCP. Fig. 1. WAXD profiles of TLCP/PBT composites Fig. 2. HDT of TLCP/PBT composites References 1. G. Kiss, Polym. Eng. Sci., 27, 410 (1987). 2. D. Dutta, A. Fruitwala, A. Kohli, and R. A. Weiss, Polym. Eng. Sci., 30, 1005 (1990). 3. S. H. Kim, S. W. Kang, J. K. Park, and Y. H. Park, J. Appl. Polym. Sci., 70, 1065 (1998). 4. D. S. Park and S. H. Kim, J. Appl. Polym. Sci., 87, 1842 (2003). 5. J. Y. Kim, E. S. Seo, S. H. Kim, and T. Kikutani, Macromol. Res., 11, 62 (2003). 6. S. H. Kim, Modern Polyesters, Eds. J. Scheirs and T. E. Long, Wiley Interscience, New York, 2004, Chap. 20. 7. J. Y. Kim, S. H. Kim, T. Kikutani, J. Polym. Sci. Part B: Polym. Phys., 42, 395 (2004). |
| 저자 | 김준영, 박회수, 최지형, 김성훈 |
| 소속 | 한양대 |
| 키워드 | Liquid-crystalline polymer; Poly(butylene terephthalate); Heat distortion temperature; Composites |
