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Effect of flexible polymers on the dielectric dispersion of rod-like macromolecules

✍ Scribed by A.K. Gupta; H. Benoit; E. Marchal

Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
324 KB
Volume
15
Category
Article
ISSN
0014-3057

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✦ Synopsis

The rotational diffusion of rod-like polar macromolecules (poly-7-benzyl-L-glutamate or polyn-hexylisocyanate) within entangled non polar polymer coils (polystyrene) is studied by dielectric absorption in solution. The dielectric increment as well as the rotatory diffusion constant is studied as a function of molecular weight of both components and increasing concentration of the non-polar polymer as well as the temperature. The classical theory of rotational diffusion is not obeyed if the viscosity of the polystyrene solution is taken as the medium viscosity. An increase in molecular aggregation on polystyrene addition is suspected.

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