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 년도별 목차보기 |
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| 발행년도/권호 |
1996 년 / 권호: V.8,no.1,Feb |
| 논문제목1(원어) |
液晶性 Polyurethane의 合成과 物性에 關한 硏究 |
| 논문제목2(타언어) |
Synthesis and Physical Properties of Liquid-Crystalline Polyurethanes |
| 저자(원어) |
Lee, Jong Back (Institute of Industrial Science, Univ. of Tokyo, Roppongi, Minato-Ku, Tokyo, Japan) Song, Jin Cherl (Dept. of Textile Eng., College of Eng., Pusan National Univ., Pusan, Korea) Choi, Dae Woong (Dept. of Chemical Eng., College of Eng., Dong |
| 저자(타언어) |
Lee, Jong Back (Institute of Industrial Science, Univ. of Tokyo, Roppongi, Minato-Ku, Tokyo, Japan) Song, Jin Cherl (Dept. of Textile Eng., College of Eng., Pusan National Univ., Pusan, Korea) Choi, Dae Woong (Dept. of Chemical Eng., College of Eng., Dong |
| 소속(원어) |
Lee, Jong Back (Institute of Industrial Science, Univ. of Tokyo, Roppongi, Minato-Ku, Tokyo, Japan) |
| 소속(타언어) |
Lee, Jong Back (Institute of Industrial Science, Univ. of Tokyo, Roppongi, Minato-Ku, Tokyo, Japan) |
| 시작/끝
페이지 |
56 ~ 63 총페이지 : 8 |
| 언어(원어) |
Korean |
| 초록 |
A number of thermotropic liquid crystalline polyurethanes with mesogenic unit were synthesized by polyaddition of a para-type diisocyanate such as 1, 4-phenylene diisocyanate(1,4-PDI) with 4, 4\\\'-bis(-hydorxyalkoxy) biphenyls() in DMF. The thermal and liquid crystab line properties were examined by differential scanning calorimetry(DSC), polarized optical microscopy, and wide-angle X-ray scattering(WAXS). Intrinsic viscosities of the polymers exbibited two endothermic peaks correspondinding to phase transitions of melting and isotropization. For example, polyurethane(1,4-PDI/() ) was found to display a liquid crystalline phase between 177 to 205. In order to know how the hydrogen bonding interaction affects the formation of mesophases in polyurethane 1, 4-PDI/() / thermal processing FT-IR measurements were carried out. It was found that the stretches regarded as shift to higher frequency region with increasing temperature which showed grdually their liquid crystalline phase |
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