GELATION OF DIBLOCK COPOLY(OXYETHYLENE OXYBUTYLENE) IN AQUEOUS-SOLUTION

被引：53
作者：
BEDELLS, AD
ARAFEH, RM
YANG, Z
ATTWOOD, D
PADGET, JC
PRICE, C
BOOTH, C
机构：
[1] UNIV MANCHESTER,MANCHESTER POLYMER CTR,DEPT CHEM,MANCHESTER M13 9PL,LANCS,ENGLAND
[2] ICI SPECIALTIES,RES & TECHNOL,RUNCORN WA7 4QD,CHESHIRE,ENGLAND
[3] UNIV MANCHESTER,MANCHESTER POLYMER CTR,DEPT PHARM,MANCHESTER M13 9PL,LANCS,ENGLAND
来源：
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1993年 / 89卷 / 08期
关键词：
D O I：
10.1039/ft9938901243
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The gelation of concentrated aqueous micellar solutions of three diblock copoly(oxybutylene/oxyethylene)s (E50B13, E49B8 and E24B10, where E represents oxyethylene and B represents oxybutylene) was investigated. The gel regions of the temperature-concentration diagrams were identified, including the lower and upper temperature gel-sol boundaries. The effect on gelation of micellar mass and size (which were known for the systems under investigation) was determined, and shown to be consistent with the packing of micelles modelled as hard spheres. The thermodynamics of gelation was investigated, and the derived quantities compared with those reported previously for related triblock copolymers (E(m)B(n)E(m)). The mechanism of gelation at high and low temperatures is discussed, the former being related to the effect of temperature on micellar swelling, and the latter to ongoing micellisation.
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页码：1243 / 1247
页数：5
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