7948. PVNO

Nomenclature

CAS number: 26715-00-4
4-Ethenylpyridine 1-oxide homopolymer; poly(4-vinylpyridine-N-oxide); PVPNO.
(C7H7NO)x.

Description and references

Prepn and thermal properties: P. Ranganathan et al., J. Polym. Sci. A 28, 2711 (1990). Viscosity and light scattering: C.-M. Lee et al., Polymer 37, 4283 (1996); fluorescence and metal-ion complexation: Y. Okamoto et al., Macromolecules 31, 9201 (1998). Interaction with sodium dodecyl sulfate, q.v.: P. Bahadur et al., Langmuir 11, 1951 (1995). Use as a dye transfer inhibitor: R. K. Panandiker et al., WO 9513354; eidem, US 5466802 (both 1995 to Proctor & Gamble); as adsorbent stabilizer for metal catalysis: A. B. R. Mayer, J. E. Mark, J. Macromol. Sci. Pure Appl. Chem. A34, 2151 (1997); T. Balakrishnan, V. Rajendran, J. Appl. Polym. Sci. 78, 2075 (2000). GC/MS determn in laundry detergents: T. Uchiyama et al., J. Anal. Appl. Pyrolysis 45, 111 (1998).

Chemical structure

Properties

Crystallized as white solid monomer from benzene-hexane. mp 122°. Polymerizes at 100-125° under vacuum in a sealed tube; decomposes 290°. uv max (water): 257 nm (ε 19844). Sol in water and acidic media. Insol in most organic solvents including DMSO, dimethylacetamide, THF, and acetone.

Use

Dye transfer inhibitor used in laundry detergents. Support for metal catalysts.