| 학회 | 한국고분자학회 |
| 학술대회 | 2002년 봄 (04/12 ~ 04/13, 서울대학교) |
| 권호 | 27권 1호, p.13 |
| 발표분야 | 특별 심포지엄 |
| 제목 | How to obtain the Three-dimensional Orientation Information with Polarized FTIR-ATR Spectroscopy |
| 초록 | Orientations of many structural units of polymeric materials have been studied with numerous experimental techniques such as X-ray scattering, birefringence, infrared and Raman spectroscopy, sonic modulus, etc. Since the mechanical properties of anisotropic polymeric materials is closely correlated with three-dimensional orientation, it is important to understand the orientational states of various structural units comprising the polymeric chains. Infrared spectroscopy has been widely used for the study of a segmental orientation, because it gives selective information on the orientation of each segment in a polymeric chain. Furthermore, information on conformational change and formation of crystalline structure can be also easily obtained through the infrared spectroscopy. However, most commercial polymeric films and fibers are too thick to be studied with the transmission infrared method. Spectroscopic methods such as specular reflection and attenuated total reflection (ATR) can be the useful alternatives. FTIR-ATR method is frequently used for the structural characterization of surfaces of thick polymer films, fibers, fabrics and coatings, because absorption occurs mainly at the surface of sample. One of the most important aspect of FTIR-ATR method is that electric field of evanescent wave exists in all three spatial directions in the rarer medium. Therefore, orientation information along three spatial directions can be obtained with polarized FTIR-ATR method. In this presentation, method to obtain three dimensional segmental orientation information using polarized FTIR-ATR spectroscopy will be presented with mainly Poly(trimethylene terephthalate) films being deformed uniaxially and/or biaxially. The three dimensional orienatation change during the crystallization and melting transition of the oriented polymer films will be also characterized with polarized FTIR-ATR methods. Those results will be compared with many different results obtained with scattering and optical methods to demonstrate the uniqueness of the information that polarized FTIR-ATR spectroscopy can provide to determine the three-dimensional orienataion informations. |
| 저자 | 이한섭 |
| 소속 | 인하대 |
| 키워드 | |
