Determination of composition in vinyl acetate – vinyl propionate copolymers

Hirai, Toshihiro

doi:10.1002/apmc.1975.050430107

Angew. Makromol. Chem.

1975

DOI: 10.1002/apmc.1975.050430107

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Determination of composition in vinyl acetate – vinyl propionate copolymers

Toshihiro Hirai

Abstract: The determination of the composition of vinyl acetate (VAc)vinyl propionate (I'Pr) copolymers has been studied by infrared (IR) and nuclear magnetic resonance (NMR) analyses. The monomer reactivity ratios for the copolymerization of VAc and VPr obtained by NMR analysis were very close to those obtained by IR analysis. Both methods appeared to be extremely rapid and accurate. ZUSAMM ENFASSC NG:Die Bestimmiing der Zusammensetzung von Copolymeren aus Vinylacetat und Vinylpropionat wurde mit Hilfe der IR-und NMR-A… Show more

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Cited by 4 publications

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Thermogravimetric analysis of vinylacetate‐vinylbutyrate copolymers

Meer

German²

1976

Angew. Makromol. Chem.

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The composition of copolymers of vinylacetate (VAc) and vinylbutyrate (VB) can be determined rapidly and satisfactorily by dynamic thermogravimetric analysis (TGA), in spite of the fact that both acetic and butyric acid are abstracted simultaneously and incompletely from their respective segments. The TGA results are compared with those obtained by gaschromatographic analysis of the reaction mixtures during copolymerization, and are within experimental error. Extension of this analysis method to other binary vinylester combinations seems to be possible. ZUSAMMENFASSUNG:Die Zusammensetzung von Copolymeren aus Vinylacetat (VAc) und Vinylbutyrat (VB) kann schnell und mit genugender Genauigkeit mittels dynamischer thermogravimetrischer Analyse (TGA) festgestellt werden, obgleich Essigsaure und Buttersaure zu gleicher Zeit und unvollstandig aus den diesbezuglichen Segmenten abgespalten werden. Die TGA-Resultate werden mit aus gaschromatographischen Analysen erzielten Ergebnissen verglichen; sie liegen innerhalb der experimentellen Fehler. Die Ausweitung auf andere binare Vinylester-Kombinationen ist wahrscheinlich moglich.

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Thermogravimetric analysis of vinylacetate‐vinylbutyrate copolymers

Meer

German²

1976

Angew. Makromol. Chem.

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Iodine reaction of vinyl acetate/vinyl propionate copolymers. III. Iodine affinities of the radically polymerized copolymers and the copolymers derived from partially saponified polyvinyl acetate

Hirai

Kajikawa

Tanaka

1977

Angew. Makromol. Chem.

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Sequence distributions of vinyl chloride‐vinyl acetate and vinyl chloride‐vinyl propionate copolymers

Okada

Hashimoto

Ikushige

1981

J. Polym. Sci. Polym. Chem. Ed.

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Abstract13C‐NMR spectroscopy was used in a detailed study of vinyl chloride‐vinyl acetate and vinyl chloride‐vinyl propionate copolymers. The NMR spectra of the methylene carbon region showed three split peaks whose intensities changed with composition of the copolymers. These peaks were assigned to diad sequences and the observed diad concentrations were in good agreement with the calculated concentrations in terms of the random copolymerization theory. For the methine carbon spectra of vinyl acetate or vinyl propionate units in the copolymers the degree of splitting of the signal was improved by the addition of tris(1,1,1,2,2,3,3‐heptafluro‐7,7‐diemthyl‐1,4,6‐octanedinata)‐praseodymium as a shift reagent. Four peaks assigned to the methine carbon were interpreted in terms of triad sequence distribution and tacticity.

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Determination of composition in vinyl acetate – vinyl propionate copolymers

Cited by 4 publications

References 6 publications

Thermogravimetric analysis of vinylacetate‐vinylbutyrate copolymers

Thermogravimetric analysis of vinylacetate‐vinylbutyrate copolymers

Iodine reaction of vinyl acetate/vinyl propionate copolymers. III. Iodine affinities of the radically polymerized copolymers and the copolymers derived from partially saponified polyvinyl acetate

Sequence distributions of vinyl chloride‐vinyl acetate and vinyl chloride‐vinyl propionate copolymers

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