We study on the phase diagram of the polymer blend. For this purpose, one PS (polystyrene) and two PI(polyisoprene) were employed whose molecular weights were low enough to make the experimental determinations possible. The weight-average molecular weight(Mw) of PS was 2514, and Mws of two PIs were 2700. Interaction energy density (IED) of the Flory-Huggins lattice theory was defined as a function of temperature and composition, and the consequent equations for the binodal, and critical points were derived. By fitting the experimental binodal points to the derived binodal curve with a nonlinear regression method, the expression for the IED was determined. And the expression for the IED obtained from this study was compared with those reported in the literatures. Also were discussed the importance of accuracy in the expression the IED, and the IED`s dependency on the temperature, composition and molecular weights.
목차
ABSTRACT 서론 본론 실험 실험 장치 광산란 실험 결과 및 고찰 PS와 PI사이의 Interaction Energy Density의 실험적 측정 및 이를 이용한 PS/PI 블랜드의 상평형도 Interaction Energy Density의 온도, 조성 및 분자량 의존성 결론 문헌