Viscometric study on the compatibility of polymer–polymer mixtures in solution

The intrinsic viscosities of blends of poly(vinyl chloride)/poly(ethylene-co-vinyl acetate) (PVC/EVA), poly(vinyl chloride)/poly(styrene-co-acrylonitrile) (PVC/SAN), and poly(ethylene-co-vinyl acetate)/poly(styrene-co-acrylonitrile) (EVA/SAN) have been studied in cyclohexanone as a function of blend composition. In order to predict the compatibility of polymer pairs in solution, the interaction parameter term, Δb, obtained from the modified Krigbaum and Wall theory, and the difference in the intrinsic viscosities of the polymer mixtures and the weight average intrinsic viscosities of the two polymer solutions taken separately are used. © 1994 John Wiley & Sons, Inc.

Miscibility studies of polymer blends by viscometry methods

Compatibility studies of polymer–polymer systems by viscometric techniques: nitrile-rubber-based polymer blends

A novel method for determination of polymer-polymer miscibility by viscometry

Dans ce travail sont presentes quelques resultats experimentaux et quelques considerations theoriques concernant l'indice limite viscosimetrique du polystyrene, (PS), dissous dans un melange de poly(methacrylate de methyle), (PMMA), et de p-xylene, et de PMMA dissous dans un melange de PS et de p-xylene. A une concentration relativement basse, on peut essayer d'interpreter ces systemes en faisant appel au formalisme des solutions diluees et en introduisant un coefficient d'interaction bAB entre les deux polymeres A et B. Cette voie, qui semble la plus simple, est difficile a utiliser quantitativement. car měme pour des concentrations moderees, il faut considerer des termes d'ordre superieur.



Les resultats obtenus peuvent ětre expliques par une diminution des dimensions du polymere qui est plus prononcee quand le «polymere-solvant» est de petite masse moleculaire.



A une concentration elevee, il apparaǐt un point critique qui semble se manifester quand le volume total de la solution est occupe par les deux polymeres.



Some theoretical considerations and experimental results are presented on the limiting viscosity number of polystyrene, (PS), dissolved in a mixture of poly(methyl methacrylate), (PMMA), and p-xylene, and of PMMA in a mixture of PS and p-xylene. At relatively low concentration, this problem can be treated using the classical formalism of dilute solutions, introducing in addition a new parameter bAB characterizing the interactions between the polymers A and B. The quantitative use of this apparently simple method involves some difficulties owing to the fact that terms of higher order have to be taken into account even at moderate concentrations.



The results can be explained by a decrease of the polymer dimensions which is more pronounced when the “solvent polymer” is of low molecular weight.



At higher concentration, there is a critical point which seems to appear when the total volume of the two polymers is equal to the volume of the solution.

Étude viscosimétrique du système ternaire polystyrène/poly(méthacrylate de méthyle)/p‐xylène

On the possibility of estimating polymer compatibility from viscosity measurements of ternary systems polymer-polymer-solvent

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On the possibility of estimating polymer compatibility from viscosity measurements of ternary systems polymer-polymer-solvent