Phase equilibria of CO2-PET-phenol system and generation of PET powders by supercritical CO2 anti-solvent

被引：29

作者：

Li, D ^{[1
]}

Liu, ZM ^{[1
]}

Yang, GY ^{[1
]}

Han, BX ^{[1
]}

Yan, HK ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China

来源：

POLYMER | 2000年 / 41卷 / 15期

基金：

中国国家自然科学基金;

关键词：

supercritical CO2; poly(ethylene terephthalate); phenol;

D O I：

10.1016/S0032-3861(99)00761-2

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理]; 080501 [材料物理与化学]; 081704 [应用化学];

摘要：

Phase equilibria of CO2=Phenol-Poly(ethylene terephthalate) (PET) ternary system were investigated at 318.15 and 326.15 K and at pressures ranging from 6 to 17 MPa. The results show that the solubility of CO2 in PET/phenol solution increases with pressure, and decreases with temperature. The solubility of PET in phenol (on CO2-free basis) decreases significantly with pressure at pressures lower than 10 MPa at 318.15 K and 11 MPa at 326.15 K, but increases slightly with pressure at higher pressures. On the basis of the phase behavior studied, PET powders were produced by the gas anti-solvent (CAS) process, and the morphology of the precipitated PET was examined using scanning electron microscopy. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：5707 / 5712

页数：6

共 18 条

[1]

Preparation and characterization of microcellular polystyrene foams processed in supercritical carbon dioxide [J].