THE STRUCTURE AND EXTENT OF SUPERMOLECULAR FORMATION IN AGED AQUEOUS POLY(VINYL ALCOHOL) SOLUTION

Authors
AHMAD N SAEED A KALSOOM U AHMAD B
Citation
N. Ahmad et al., THE STRUCTURE AND EXTENT OF SUPERMOLECULAR FORMATION IN AGED AQUEOUS POLY(VINYL ALCOHOL) SOLUTION, Journal of the Chemical Society of Pakistan, 16(1), 1994, pp. 4-7
Citations number
15
Categorie Soggetti
Chemistry
Journal title
Journal of the Chemical Society of Pakistan → ACNP
ISSN journal
02535106
Volume
16
Issue
1
Year of publication
1994
Pages
4 - 7
Database
ISI
SICI code
0253-5106(1994)16:1<4:TSAEOS>2.0.ZU;2-K
Abstract
Two commercial samples of PVA were subjected to determine the supermol ecular structure formation in aqueous media, by tight scattering and v iscometric method. Solutions of various concentrations were aged upto 80 days and then, the intrinsic viscosity [eta], weight average molecu lar weight (Mw), radius of gyration (Rg2)1/2 were determined. From thi s, the extent of supermolecular formation of fresh solutions as well a s the aged solutions was determined. It was found that supermolecular formation occurs to a lower degree during aging, and it increases with the concentration of the aging solution.