EFFECT OF SOLVENT ON THE STRUCTURE OF THE SOLUTIONS OF POLY(VINYL CHLORIDE CO-MALEIC ANHYDRIDE)

Citation
Em. Berezina et al., EFFECT OF SOLVENT ON THE STRUCTURE OF THE SOLUTIONS OF POLY(VINYL CHLORIDE CO-MALEIC ANHYDRIDE), Vysokomolekularnye soedinenia. Seria A, 37(12), 1995, pp. 2043-2048
Citations number
10
Categorie Soggetti
Polymer Sciences
ISSN journal
05075475
Volume
37
Issue
12
Year of publication
1995
Pages
2043 - 2048
Database
ISI
SICI code
0507-5475(1995)37:12<2043:EOSOTS>2.0.ZU;2-V
Abstract
Experimental data on the concentration dependence of reduced viscosity of poly(vinyl chloride-co-maleic anhydride) solutions in six solvents were approximated by an empirical equation eta(r) = a + bexp (-dc), w here a and b characterize the electrostatic and covalent contributions to solvation, respectively, and d is the energy characteristic of tau tomerism of the copolymer. Relationships between coefficients a, b, an d c of the equation and dipole moment and acceptor and donor numbers o f a solvent were established. Parameters a and b make it possible to e valuate the energy and stationarity constants of the universal and spe cific contributions to solvation of this copolymer. The shape of poly( vinyl chloride-co-maleic anhydride) macromolecules with respect to zig zag was assessed in different solvents. The shape changed from the coi l, in ethyl acetate, to distorted rods, in THF and 1,4-dioxane.