Assignment of finely resolved 13C NMR spectra of poly(vinyl alcohol)

Autor:	Kenichi Hatanaka, Kei Matsuzaki, Kaname Katsuraya, Shigetoshi Amiya
Rok vydání:	2001
Předmět:	chemistry.chemical_classification Vinyl alcohol Polymers and Plastics Chemistry Organic Chemistry Nuclear magnetic resonance spectroscopy Polymer Carbon-13 NMR Spectral line chemistry.chemical_compound Crystallography Polymerization Polymer chemistry Materials Chemistry Spectrum analysis Methylene
Zdroj:	Polymer. 42:9855-9858
ISSN:	0032-3861
DOI:	10.1016/s0032-3861(01)00536-5
Popis:	13C NMR spectra of three poly(vinyl alcohol)s differing in the stereoregularity (atactic, syndiotactic-rich and isotactic-rich) were determined in DMSO-d6 and D2O. The methylene and methine carbon absorptions including so far unassigned ones (mmmr heptad signals in mm-centered region and all heptad signals in mr-centered region) were completely assigned with hexads and heptads, respectively, and the assignments were quantitatively confirmed for atactic and syndiotactic-rich poly(vinyl alcohol)s. The isotactic-rich polymer showed a discrepancy between the observed and the calculated intensities, assuming the first-order Markov statistics, due to difficulty in determining its polymerization mechanism.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::67ba6903575e4a5ca56ab46a7f9e0925 https://doi.org/10.1016/s0032-3861(01)00536-5 Zobrazit plný text záznamu Full Text from ScienceDirect