| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 고분자 구조 및 물성 |
| 제목 | Analysis of Mechanical Properties of Polymer ABC by Atomic Force Microscopy |
| 초록 | Atomic force microscopy (AFM) is widely used as an imaging tool for elastic samples like polymers and biomaterials. However, AFM is also applicable for measuring the elasticity of a sample surface. Surfaces of polymer blends were investigated using AFM to study their nanomechanical properties (nanorheology). We were particularly interested in information obtained from force-distance curve methods on rubbery or melt state samples. In order to realize clear comparison, a rubbery sample, polyisobutylene (PIB), was blended with a glassy-state sample, polystyrene (PS). When PS/PIB blends were observed in contact-mode operation, PIB-rich phases appeared as depressions. However, this was an artifact caused by the very low elastic modulus of PIB. By analyzing the force-distance curve, sample deformation by the force exerted was estimated together with real height free from sample deformation. Thus, if force-distance curve measurements are performed on every point of the sample, we can reconstruct a “real height image” and a “sample deformation image”. The apparent depressions became almost flat in the “real height image” by this analysis. With further analysis using Hertz theory, an elastic modulus image of the sample was also obtained, which correlated more closely with the “real height image” than with the “apparent height image”. We will also demonstrate other application cases for polymer blends and composites. |
| 저자 | 이재순1, So FUJINAMI2, Hideyuki NUKAGA2, Ken NAKAJIMA2, Toshio NISHI2, 김성철1 |
| 소속 | 1한국과학기술원, 2Tokyo Institute of Technology |
| 키워드 | AFM; polymerblend; nanorheology; force-volume; elastic modulus |
