SPIN-LABELING STUDY OF SILICA MODIFIED BY A COPOLYMER OF VINYLPYRROLIDONE AND VINYL CHLOROFORMATE

Authors
TOUHAMI A HOMMEL H LEGRAND AP VIVARATPERRIN MP SEBILLE B
Citation
A. Touhami et al., SPIN-LABELING STUDY OF SILICA MODIFIED BY A COPOLYMER OF VINYLPYRROLIDONE AND VINYL CHLOROFORMATE, Colloids and surfaces. A, Physicochemical and engineering aspects, 72, 1993, pp. 55-62
Citations number
29
Categorie Soggetti
Chemistry Physical
Journal title
Colloids and surfaces. A, Physicochemical and engineering aspects → ACNP
ISSN journal
09277757
Volume
72
Year of publication
1993
Pages
55 - 62
Database
ISI
SICI code
0927-7757(1993)72:<55:SSOSMB>2.0.ZU;2-6
Abstract
The mobility of a copolymer of vinylpyrrolidone and vinyl chloroformat e either chemically grafted or physically adsorbed on silica has been studied by the spin-labelling method and electron paramagnetic resonan ce spectroscopy. The signals give information about the local microsco pic mobility of the segment to which the label is attached. The influe nce of the type of bonding of the chains, the coverage achieved, the p resence of the ligand p-aminobenzamidine (pABA), and the nature of the solvent put into contact are investigated. All these factors have a m arked effect on the mobility of the chains.