ISSN:
0449-2951
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Physik
Notizen:
Light-scattering studies of well fractionated samples of poly(vinyl acetate) were carried out in four solvents, viz., acetonitrile, ethyl formate, methyl isobutyl ketone, and dioxane, in order to investigate the effect of the polar and nonpolar nature of the solvents on the molecular weight and the viscosity of the samples studied. The molecular weights thus obtained are found to be in good agreement in all the solvents except dioxane, in which the values are twice as high. This twofold increase in dioxane has been explained in terms of secondary bonding. The relation between [η] and Mw are established for the systems poly(vinyl acetate)-ethyl formate, poly(vinyl acetate)-acetonitrile, and poly(vinyl acetate)-methyl isobutyl ketone. The root-mean-square radii and the second virial coefficients are also determined.
Zusätzliches Material:
5 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/pol.1963.100010119
