Hydrodynamic characteristics of aqueous poly(N-vinyl-2-pyrrolidone) solutions in the presence of denaturing agents

✍ Scribed by Alï Güner

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 105 KB
• Volume: 67
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19980228)67:9<1615::aid-app13>3.0.co;2-t

✦ Synopsis

The aqueous solution properties of poly ( N-vinyl-2-pyrrolidone ) ( PVP )denaturing agents ( i.e., thiourea, guanidinium chloride, and carbonate ) were studied by viscosity measurements. The polymer dimensions were calculated at 25ЊC and at previously determined theta temperatures. The unperturbed dimension parameter, K 0 , hydrodynamic expansion factor, a h , and unperturbed root-mean-square end-toend distance, » r 2 … 1 / 2 0 , have been evaluated. Viscosimetrically determined characteristics ( e.g., intrinsic viscosity, Huggins constants ) and the high values of a h and » r 2 … 1 / 2 0 can be explained by the interaction between the polymer and denaturing agents.