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Materiale Plastice
Cite as: Mater. Plast.
https://doi.org/10.37358/Mat.Plast.1964

OSIM Nr. R102356
ISSN Print 0025-5289
ISSN Online 2668-8220
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Materiale Plastice (Mater. Plast.), Year 2009, Volume 46, Issue 4,





RADU N. OLARU, DUMITRU-MIRCEA VULUGA, FLORENTINA GEORGESCU, DANIELA MILITARU, CONSTANTIN DRAGHICI, MIHAI DIMONIE Comparative Characterization of Polyvinyl Alcohols for Vinyl Chloride Suspension Polymerization 1. The Degree of Hydrolysis


Abstract:
The paper presents a comparative study on the structure of some polyvinyl alcohols used in PVC-S technology. The obtained data clearly showed that the degree of hydrolysis can be determined, with the same high precision through chemical method, IR and 13C-NMR spectra. The carbonyl content determined from the IR spectra also correlates with the carbonyl content determined from 13C-NMR spectra. A fast and reliable IR method for checking the degree of hydrolysis as technological support can be provided, the normalized carbonyl content determined from IR spectrum being linearly correlated with the degree of hydrolysis. Keywords: Polyvinyl alcohols, vinyl alcohol-vinyl acetate copolymers, IR spectra, 1H-NMR spectra, 13C-NMR spectra



Issue: 2009 Volume 46, Issue 4
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