CLOUD-POINT CURVES OF POLYMER-SOLUTIONS FROM THERMOOPTIC MEASUREMENTS

被引：227

作者：

BAE, YC

LAMBERT, SM

SOANE, DS

PRAUSNITZ, JM

机构：

[1] UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720

[2] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720

来源：

MACROMOLECULES | 1991年 / 24卷 / 15期

关键词：

D O I：

10.1021/ma00015a024

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Thermooptical analysis (TOA) provides a simple, rapid, and reliable experimental method to determine cloud-point curves of binary polymer/solvent systems. Phase diagrams have been obtained for different molecular weights of polystyrene in cyclohexane, methylacetate, ethylacetate, and tert-butylacetate and for poly(ethylene glycol) in water. Polystyrene solutions exhibit both upper and lower critical solution temperatures, while aqueous poly(ethylene glycol) solutions give closed-loop phase diagrams. The TOA apparatus described here uses very small samples (0.02 cm3); for a binary system, upper and lower cloud-point curves can easily be obtained in approximately 8 h.

引用

页码：4403 / 4407

页数：5

共 27 条

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