|
|||||
|
|
Simultaneous liquid–liquid demixing and crystallization and its effect on the spherulite growth in poly(ethylene terephthalate)/poly(ether imide) blends |
|
| Authors: | Hsin-Lung Chen Jenn Chiu Hwang Jen-Ming Yang Rong-Chung Wang |
| Affiliation: | a Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu 30043, Taiwan, Republic of China b Department of Chemical Engineering, Yuan Ze University, Nei-Li, Taoyuan, Taiwan, Republic of China c Department of Chemical Engineering, Chang Gung University, Kwei-San, Taoyuan, Taiwan, Republic of China |
| Abstract: | Poly(ethylene terephthalate) (PET)/poly(ether imide) (PEI) blends were miscible in the melt, but exhibited simultaneous liquid–liquid phase separation and crystallization over a wide range of temperature and composition. The interplay between these two processes is expected to dominate the morphological formation in the blends. In this study, the phase diagram of PET/PEI blend was determined to evaluate the envelop within which liquid–liquid phase separation was operative with crystallization. A UCST phase diagram below 240°C was identified for this system. The effect of liquid–liquid phase separation on the growth of PET spherulites was studied by small-angle light scattering (SALS). Nonlinear spherulite growths were observed for the blends at higher crystallization temperatures of 210°C and 220°C, while the growths were basically linear below 210°C. The nonlinear growth behaviour was discussed based on the competition between spherulite growth and spinodal decomposition. |
| Keywords: | Polymer blends Polyetherimides Polyethylene terephthalates Crystallization Solubility Phase separation Thermal effects Composition effects Morphology Phase diagrams Decomposition Growth (materials) Light scattering Liquid-liquid demixing Spherulites Small-angle light scattering (SALS) |
| 本文献已被 ScienceDirect 等数据库收录！ | |