Effect of Arm Exchange on the Liquid-Solid Transition of Dense Suspensions of Star Polymers

被引:9
|
作者
Puaud, Fanny [1 ]
Nicolai, Taco [1 ]
Benyahia, Lazhar [1 ]
Nicol, Erwan [1 ]
机构
[1] Univ Maine, LUNAM, Inst Mol Mat Mans, UMR CNRS 6283, F-72085 Le Mans, France
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 2013年 / 117卷 / 40期
关键词
CRYSTALLIZATION;
D O I
10.1021/jp407487q
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
Star polymers with dynamic arm exchange are formed in water by self-assembly of amphiphilic diblock copolymers based on poly(ethylene oxide) end capped with a small hydrophobic block. The arm exchange was arrested in situ by photo-cross-linking of the core. The effect of dynamic arm exchange on the osmotic compressibility and viscosity was investigated systematically as a function of the concentration and temperature. The discontinuous liquid-solid transition reported for dense polymeric micelle suspensions was found to be preserved after dynamic arm exchange was arrested in situ. The effect of cross-linking and aggregation number on the liquid-solid transition was investigated.
引用
收藏
页码:12312 / 12318
页数:7
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