Multi-Bridging Polymers. Synthesis and Behaviour in Aqueous Solution

被引：9
|
作者：
de Molina, P. Malo [1 ]
Herfurth, C. [2 ]
Laschewsky, A. [2 ,3 ]
Gradzielski, M. [1 ]
机构：
[1] Tech Univ Berlin, Inst Chem, Stranski Lab Phys & Theoret Chem, Str 17 Juni 124,Sekr TC7, D-10623 Berlin, Germany
[2] Univ Potsdam, Inst Chemie, Potsdam, Germany
[3] Univ Potsdam, Fraunhofer Inst Angewandte Polymerforsch, Potsdam, Germany
来源：
TRENDS IN COLLOID AND INTERFACE SCIENCE XXIV | 2011年 / 138卷
关键词：
end-capped; polymer network; RAFT; associative thickening; RADICAL POLYMERIZATION; RAFT POLYMERIZATION; FLUORESCENCE; COPOLYMERS; NETWORKS; RHEOLOGY;
D O I：
10.1007/978-3-642-19038-4_12
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
We synthesized novel hydrophobically endcapped poly(N, N-dimethylacrylamide) (PDMA) star polymers of variable functionality by the RAFT procedure. The properties of these polymers in aqueous solutions were characterised by means of DLS, SANS, and rheology measurements. It was observed that they form interconnected aggregates with a correspondingly increased viscosity. Although the static structure of these systems does not depend to a larger extent on the number of hydrophobic stickers per polymer, the dynamic properties and in particular the rheological properties vary substantially with the number of arms. An increase of non-diffusive relaxation with increasing number of arms is observed by DLS and this complex dynamic behaviour is correlated to an increase of the elastic properties of the formed aggregate networks.
引用
收藏
页码：67 / 72
页数：6
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