Preferential solvation of polyvinylacetate (PVA) in water-ethanol mixtures and its effect on the permeability properties of PVA-membranes

Conference · Wed May 01 00:00:00 EDT 1985

OSTI ID:5574869

Neidlinger, H H

The preferential interaction of polyvinylacetate (PVA) with one of the solvent components in water-ethanol mixtures has been investigated by the method of equilibrium dialysis, evaluated by differential refractometry. It has been found that at a 1:1 molar ratio of water-ethanol there occurs an inversion point of preferential solvation. The overall solvation was determined from intrinsic viscosity and equilibrium swelling measurements. Its plot versus the composition of the binary solvent has a maximum that practically coincides with the inversion point of the preferential solvation. These results are compared with those obtained from pervaporation studies carried out on PVA-membranes in the same solvent system, and they are discussed in terms of the existence of special interaction phenomena due to hydrogen bonding effects. It can be concluded that for the system investigated preferential solvation parameters help to understand, but do not necessarily predict, membrane permselectivity. 12 refs., 14 figs., 2 tabs.

• Research Organization: Solar Energy Research Inst., Golden, CO (USA)
• DOE Contract Number: AC02-83CH10093
• OSTI ID: 5574869
• Report Number(s): SERI/TP-255-2712; CONF-841266-1; ON: DE85008816
• Resource Relation: Conference: 12. biennial polymer symposium of the Division of Polymer Chemistry of the American Chemistry Society, Maui, HI, USA, 12 Dec 1984
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
10 SYNTHETIC FUELS
ETHANOL
SEPARATION PROCESSES
POLYVINYLS
SOLVATION
MEMBRANES
PERMEABILITY
SWELLING
ALCOHOLS
HYDROXY COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
090222* - Alcohol Fuels- Preparation from Wastes or Biomass- (1976-1989)
090110 - Hydrocarbon Fuels- Properties- (1979-1989)