FORMATION OF BLOCK-COPOLYMER MICELLES IN SOLUTIONS OF A LINEAR HOMOPOLYMER IN A GOOD SOLVENT

被引：7

作者：

QUINTANA, JR ^{[1
]}

JANEZ, MD ^{[1
]}

KATIME, I ^{[1
]}

机构：

[1] UNIV BASQUE COUNTRY, FAC CIENCIAS, DEPT QUIM FIS, NUEVOS MAT GRP, E-48080 BILBAO, SPAIN

来源：

MACROMOLECULAR RAPID COMMUNICATIONS | 1995年 / 16卷 / 08期

关键词：

D O I：

10.1002/marc.1995.030160810

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The existence of micelles of polystyrene-block-poly(ethylene/propene) in solutions of polystyrene in toluene was investigated. Toluene is a good solvent of both copolymer blocks whereas polystyrene and poly(ethylene/propene) are immiscible polymers. The presence of homopolystyrene at high enough concentration can induce the micellization of polystyrene-block-poly(ethylene/propene) in solution of a good solvent such as toluene. The thermodynamics of this new micelle system at a given polystyrene concentration was studied. Light scattering measurements were carried out in order to determine the critical micelle temperature (CMT) of different micellar solutions. Standard Gibbs energy, enthalpy and entropy of micellization were estimated from CMT and concentration data. The numerical values found were less negative than those found for micelle systems consisting in a block copolymer dissolved in a single selective solvent.

引用

页码：607 / 612

页数：6

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