Quantitative Determination of Vinyl Acetate Content of Ethylene-Vinyl Acetate Copolymers by High-Resolution Nuclear Magnetic Resonance.

Chen, H. Y.; Lewis, M. E.

doi:10.1021/ac60213a066

Cited by 20 publications

(2 citation statements)

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“…In another study (20) S M R was employed for quantitative determination of the vinyl acetnte content of ethylene-vinyl acetate couolymers. Ferrocene was used as an internal standard and the analytical results for blends and commercial copclymers were presented.…”

Section: Specific Classes Of H I G H Polymersmentioning

confidence: 99%

Coatings

Swann¹,

Adams²,

Esposito³

1965

Anal. Chem.

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Coating and Chemical laboratory, Aberdeen Proving Ground, Md.H E IMPORTANT CONTRIBUTIONS to T the analysis of coating materials as selected by the reviewers since the previous summary (137) are contained in this biennial review. The period covered extends from November 1962 through December 1964, although a few significant foreign publications, located by abstracts, may predate this ccverage. In this attempt to be selective, it is hoped that valuable publicat i m s have not been omitted. Other similar reviews were made within this pericd (102)(103)(104) 106) in addition to home studies of special subjects. The annual revieus of analytical methods for the examination of oils and fatty acids (81, 82) are very comprehensive.Firestone (56) reviewed available methods for analyzing polymerized fats and oils and James (51) prepared a comprehensive revieh of analytical procedures for separating naturally occurring fatty acids including cisand trans-isomers.The fifth edition of "Standard Methods for the Analysis of Oils, Fats and Soaps" (153) has been published and includes a number of physical and chemical test methods not found in the 10-year old fourth edition. Over one-half of the 122 pages of "Prog~ess in the Chemistry of Fats and Other Lipids" (52) are devoted to the applications of gas chromatography in this field.Boekenoogen (15) has edited the first volume of a work surveying the entire field of analysis of oils and fats.h review of the uses of gas liquid chromatography in the field of drying oils was prepared (40) while several reviews (53, 105,118) are concerned with application of gas chromatography to analysis and research in the field of coatings in general. Two new books on the subject of thin layer chromatography (14,113) include methods for separations of such coating materials as oils, fatty acids, plasticizers, and carboxylic acids. Rybicka (119) prepared a survey of thin layer chromatography with special reference to the problems of the paint analyst. A review t,hat also includes some original methods for the analysis of alkyd resins (115) was prepared in which the analyt,ical scheme was divided into physical tests and chemical tests.Two reviews (72, 127) of the analysis of synthetic resins in general were published; the one by Kupfer contains 227 references. Lucchesi (78) prepared a paper on the role of analytical tools in coating research, commenting mostly on the applications of nuclear magnetic resonance, gel permeation c hromatogral ihy , and attenuated total reflectance for surface analysis. Valentine (146) discussed the use of the electron microsope and the Coulter counter, as well as reflectance spectrophotometry for the study of paint films.The Office of Technical Services of the U. S. Department of Commerce prepared a selective bibliography (145) of its available reports on paints and varnishes, collected from 1945 through 1963; unfortunately, however, many available reports on the subject were omitted from the listing. GENERAL ANALYTICAL SCHEMES13y far the greatest nuinber of contributions...

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Section: Specific Classes Of H I G H Polymersmentioning

confidence: 99%

Coatings

Swann¹,

Adams²,

Esposito³

1965

Anal. Chem.

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“…Ethylene copolymers composition may be analyzed by several instrumental techniques such as infrared spectrometry, high-energy radiolysis, gas chromatographic analysis of copolymer pyrolysates and nuclear magnetic resonance [Lindemann, 1968]. High resolution nuclear magnetic resonance can be used with ease and accuracy for vinyl acetate-ethylene copolymers over a wide range of vinyl acetate contents above 1%, which is the practical accuracy limit of the method [Porter et al, 1963;Chen et al, 1964].…”

Section: -C -O -mentioning

confidence: 99%

Emulsion polymerization of ethylene-vinyl acetate-branched vinyl ester using a pressure reactor system

Tan¹

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CHAPTER 1 INTRODUCTION 1.1 Overview 1 1.2 Motivation and objectives for this study CHAPTER 2 LITERATURE REVIEW 2.1 Relevance and motivations 4 2.2 Historical background of VAE pressure Latex 2.3 Review of patent literature on ethylene-based pressure latex 2.4 Typical monomer compositions used in pressure latexes 2.5 Plasticization of vinyl acetate 2.6 Comparison of ethylene vs. acrylates as co-monomer for vinyl acetate 2.7 Pressure emulsion polymerization techniques 2.8 Aspects of branched vinyl esters in vinyl latex polymerization 2.9 Physical properties of ethylene-based latex and analytical methods used ATTENTION: The Singapore Copyright Act applies to the use of this document. Nanyang Technological University Library iii CHAPTER 3 EXPERIMENTAL METHODS AND MATERIALS 3.1 Preparation of BEEVA latexes 3.1.1 Model BEEVA latexes 3.1.2 Materials used for synthesis of BEEVA latexes 3.1.3 Recipe for model BEEVA latexes 3.2 Preparation of samples 3.3 Rheological measurements 3.4 Contact angle measurements 69 3.5 Glass transition temperature measurements 3.6 Nuclear magnetic resonance (NMR) spectra measurements 70 3.7 Zeta potential and particle size measurements CHAPTER 4 DESIGN OF PRESSURE REACTOR SYSTEM 4.1 Design of pressure polymerization hardware 4.1.1 Pressure vessel 4.1.2 Agitator 4.1.3 Feed tanks and pumps 4.1.4 Haskel pump 4.1.5 Temperature control 4.1.6 Research motor valves 4.1.7 Monomer preparation system 4.2 Safety features 4.2.1 Safety devices ATTENTION: The Singapore Copyright Act applies to the use of this document. Nanyang Technological University Library iv 4.2.2 Effluent handling system CHAPTER 5 PHYSICAL PROPERTIES OF LATEXES 5.1 Introduction 5.2 Rheological properties 5.3 Determination of ethylene weight percentage using proton NMR 96 5.4 Glass transition temperature 5.5 Contact angle 5.6 Zeta potential and particle size CHAPTER 6 CONCLUSIONS AND RECOMMENDATIONS 6.1 Conclusions 6.1.1 The design of a new pressure reactor system 6.1.2 The preparation of model BEEVA latexes 6.1.3 The physical properties of model BEEVA latexes 6.2 Recommendations 123

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Determination of composition in vinyl acetate – vinyl propionate copolymers

Hirai

1975

Angew. Makromol. Chem.

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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-Analyse bestimmt. Die NMR-spektroskopisch fiir Vinylacetat und Vinylpropionat erhaltenen C'opolymerisationsparameter stimmen mit den IR-spcktroskopisch crhaltenen Wcrten recht gut iiberein. Beide Methoden erwiesen sich als ausgesprochen schnell und penau.

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Quantitative Determination of Vinyl Acetate Content of Ethylene-Vinyl Acetate Copolymers by High-Resolution Nuclear Magnetic Resonance.

Cited by 20 publications

References 3 publications

Coatings

Coatings

Emulsion polymerization of ethylene-vinyl acetate-branched vinyl ester using a pressure reactor system

Determination of composition in vinyl acetate – vinyl propionate copolymers

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