Alternating and Random Copolymers of Vinyl Acetate and Maleic Anhydride

Seymour, Raymond B.; Garner, David P.; Sanders, Laura J.

doi:10.1080/00222337908066595

Cited by 24 publications

(2 citation statements)

References 7 publications

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“…Under these conditions, an alternating distribution of the two monomers along the chain [16] can be identified. The composition of MAn-VA copolymer was determined by conductometric titration with 0.1 N aqueous NaOH in 1:1 (vol) acetone:water mixture.…”

Section: Polymersmentioning

confidence: 98%

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Thermal Stability of Maleic Acid-Vinyl Acetate Copolymer in Aqueous Solution: Size Exclusion Chromatography Analysis

Chitanu¹,

Rinaudo

Milas

2005

International Journal of Polymer Analysis and Characterization

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Sodium maleate-vinyl acetate (NaM-VA) and maleic acid-vinyl acetate (MAc-VA) copolymers were synthesized and characterized and their aqueous solutions were kept at 25 and 100 C. The molecular weight (M W ) of the copolymers was measured after different times of storage by size exclusion chromatography, and IR spectra were recorded. At 100 C, NaM-VA showed a continuous decrease of MW, which can occur due to the chain breaking and=or chemical modification, while for MAc-VA copolymer a decrease was observed, followed by an increase of the apparent MW. This difference of behavior was attributed to some interchain chemical reactions. The decrease in the molecular weight of the two copolymers at 25 C was found to be less important than at 100 C.

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Section: Polymersmentioning

confidence: 98%

“…[16][17][18] The weight-average molecular weight (M w ) of NaM-VA, determined by SEC, was 311,000 g=mol, while that of parent MAn-VA copolymer, estimated from viscometric measurements, was 110,000 g=mol. This difference could be explained by the separation of low MW fractions during dialysis.…”

Section: Polymersmentioning

confidence: 99%

Thermal Stability of Maleic Acid-Vinyl Acetate Copolymer in Aqueous Solution: Size Exclusion Chromatography Analysis

Chitanu¹,

Rinaudo

Milas

2005

International Journal of Polymer Analysis and Characterization

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Polymers from renewable resources. II. A study in the radio chemical grafting of poly(styrene-alt-maleic anhydride) onto cellulose extracted from pine needles

Chauhan

Guleria

Misra

et al. 1999

J. Polym. Sci. A Polym. Chem.

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NMR investigations on copolymers of maleic anhydride with ethylene

Rätzsch¹,

Friedrich²,

Roth

1980

Acta Polymerica

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The microstructure of copolymers of maleic anhydride with ethylerie which were synthesized in two processes differing significantly from one another was studied by means of '€1and 13C-NMR. The precipitation polymerizates as well as the products synthesized under high pressure have the same basic structure. The maleic anhydride units are found to alternate with ethylene units in the macromolecules. The observed differences in the microstructure are results of supplementary modification reactions which may take place spontaneously in the precipitation process by alcohols or during storage by atmospheric humidity with the splitting-up of the anhydride ring. 'Hand W-NMR spectroscopy proved as efficient methods for studying these modification processes. The 13C-NMR spectra allow the conclusion that the microstructure of maleic anhydride copolymers consist of different stereo conformations which occur with different probability. Kernresonanzuntersuchungen an Copolymeren aus Maleinsaureanhydrid und Ethylen&fit hochauflosender 'Hund 13C-Kernresonanz wurden Maleinsaureanhydrid-Ethylen-Copolymere untersucht, die sich im HerstellungsprozeB stark unterscheiden. Die Untersuchungen zeigten, daB sowohl FHllungs-als auch Hochdruckpolymerisation zu alternierendem Einbau der MSA-Einheiten in die Copolymerkette fuhren. Die in der Mikrostruktur festgestellten Unterschiede resultieren aus nachtrlglichen Modifizierungsreaktionen, die teils im Fallungs-prozeB durch Alkohol und teils durch Luftfeuchtigkeit unter Aufspaltung des Anhydridringes spontan eintreten konnen. Sowohl mit 1H-als auch mit W-Resonanz sind diese Modifizierungsreaktionen gut beobachtbar. Des weiteren weisen die 1%-NMR-Spektren daranf hin, daB die Copolymere aus verschiedenen Stereokonformeren aufgebaut sind.

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Alternating and Random Copolymers of Vinyl Acetate and Maleic Anhydride

Cited by 24 publications

References 7 publications

Thermal Stability of Maleic Acid-Vinyl Acetate Copolymer in Aqueous Solution: Size Exclusion Chromatography Analysis

Thermal Stability of Maleic Acid-Vinyl Acetate Copolymer in Aqueous Solution: Size Exclusion Chromatography Analysis

Polymers from renewable resources. II. A study in the radio chemical grafting of poly(styrene-alt-maleic anhydride) onto cellulose extracted from pine needles

NMR investigations on copolymers of maleic anhydride with ethylene

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