Polystyrene sulfonate light scattering

Table I shows the molecular weight and the degree of end group substitution of the monofunctional polystyrene samples obtained. In Table II the corresponding data for the bifunctional samples are given. The samples were characterized by GPC in THF. and were calculated. Comparison with the corresponding nonfunctionalized control samples show good agreement. The results of the light scattering and osmotic pressure experiments with the acid form of the sulfonated polystyrenes were in agreement. No association was observed for THF solutions.

Drifford M, Dalbiez JP. Effect of salt on sodium polystyrene sulfonate measured by light scattering. Biopolymers 1985 24 1501-1514. 

Bodycomb J, Hara M. Light scattering study of ionomers in solutions. 5. CONTIN analysis of dynamic scattering data from sulfonated polystyrene ionomer in a polar solvent (dimethylformamide). Macromolecules 1995 28 8190-8196. 

Hara M, Wu J. Light scattering study of ionomers in solution. 2. Low-angle scattering from sulfonated polystyrene ionomers. Macromolecules 1988 21 402-407. 

A homologous series of commercially available sodium-polystyrene sulfonate samples were characterized by viscometry and light scattering measurements. The molecular parameters were determined and the degree of sulfo-... 

Thielking, H. Kulicke, W.-M. On-line coupling of flow field-flow fractionation and multiangle laser light scattering for the characterization of macromolecules in aqueous solution as illustrated by sulfonated polystyrene samples. Anal. Chem. 1996, 68, 1169-1173. 

So far most studies of aggregation behavior have been conducted with low polarity solvents such as THF [4,9,15]. Recently there have been a few reports with nonpolar solvents such as xylene [16-18]. While these systems require low ion contents to form a solution, the ionomer electrical environment is more similar to that found in the solid state (i.e. low dielectric constant). In this work we use static and dynamic light scattering techniques to examine the aggregation behavior of sulfonated polystyrene ionomers in a nonpolar solvent, toluene. 

Solutions of lightly sulfonated polystyrene (SPS) sodium salts with 0 and 19% perdeuterated chains were studied throughout a concentration range of 0. -4.0 g dL" in perdeuterated tetrahydrofuran (THF-ds). A 0.5 g dL solution of unmodified polystyrene (PS) was also measured for comparison. The scattered intensity I(q) can be interpreted using the well-known Zimm equation (12)... 

B.P. Grady, H. Matsuoka, Y. Nakatani, S.L. Cooper and N. Ise, Influence of the sample preparation method on the ultra-small-angle X-ray scattering of lightly sulfonated polystyrenes, Macromolecules, 1993, 26, 4064-4066. 

For almost ten years the properties of ionomer solutions have been studied and lightly sulfonated polystyrene (S-PS) was chosen as the model compound. The properties of S-PS ionomer solutions in polar and nonpolar solvents, which are briefly reviewed, were associated with polyelectrolyte and ionomer behavior respectively. In both cases, structural models have been proposed to explain the rheological and scattering data. A similar study on perfluorinated ionomer solutions is then presented and compared in order to define some general ionomer behavior. 

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