Properties of aqueous salt solutions of poly(vinylpyrrolidone). II. Polymer dimensions and thermodynamic quantities

✍ Scribed by Güner, Ali; Ataman, Mualla

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 201 KB
• Volume: 44
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/(sici)1097-0126(199709)44:1<30::aid-pi802>3.0.co;2-6

✦ Synopsis

The unperturbed dimensions and thermodynamic parameters of poly(vinylpyrrolidone) (PVP) have been studied in aqueous salt solutions, e.g. phosphates, mono-and dihydrogen phosphates, carbonates, sulphates of sodium and potassium. Values of where is intrinsic viscosity at

the theta temperature and M is molecular weight) with M 1 w \ 78 000 g mol~1 were found to range from 4É63 ] 10~4 to 5É56 ] 10~4 dl g~1, and root-meansquare end-to-end distances, ranging from 1É61 ] 10~6 to Sr2T 0 1@2, 1É68 ] 10~6 cm were evaluated. Values of the characteristic ratio, the steric C n , parameter, p, and the enthalpy and the entropy of dilution parameters, and s H have also been calculated, and the interaction parameter was found to be s S , s [ 0É5 \ [0É001 for aqueous salt solutions of PVP.