Liquid chromatography—Fourier-transform polymers

With the advent of advanced characterization techniques such as multiple detector liquid exclusion chromatography and - C Fourier transform nuclear magnetic resonance spectroscopy, the study of structure/property relationships in polymers has become technically feasible (l -(5). Understanding the relationship between structure and properties alone does not always allow for the solution of problems encountered in commercial polymer synthesis. Certain processes, of which emulsion polymerization is one, are controlled by variables which exert a large influence on polymer infrastructure (sequence distribution, tacticity, branching, enchainment) and hence properties. In addition, because the emulsion polymerization takes place in an heterophase system and because the product is an aqueous dispersion, it is important to understand which performance characteristics are influended by the colloidal state, (i.e., particle size and size distribution) and which by the polymer infrastructure. [Pg.386]

Liang, Z., Marshall, A. G., and Westmoreland, D. G., "Determination of Molecular Weight Distributions of tert-Octylphenol Ethoxylate Surfactant Polymers by Laser Desorption Fourier Transform Ion Cyclotron Resonance Mass Spectrometry and High-Performance Liquid Chromatography," Anal. Chem., 63,815-818,1991. [Pg.426]

Somsen, G.W. Rozendom, E.J.E. Gooijer, C. Velthorst, N.H. Brinkman, U.A.Th. Polymer analysis by column liquid chromatography coupled semi-on-line with Fourier transform infrared spectrometry. Analyst 1996, 121, 1069-1074. [Pg.1685]

A Fourier transform infrared (FTIR) speetrometer equipped with an attenuated total refleetanee (ATR) aeeessory is used for the study of surfaees and coatings. A microscope attachment is useful for identifying particulate impurities. Through the technique of computerized spectral subtraction, many sample mixtures may be identified by FT-IR without prior physical separation and, thus, the technique lends itself to compositional analysis. Typical applications of FT-IR are the study of surfaces of polymers by ATR, identification of samples isolated by thin-layer chromatography or other preparatory chromatographic techniques, identification of impurities in polymer and polymer blends, product characterization and product formulations by spectral subtraction, as well as routine analysis of solid and liquid materials. [Pg.27]

Several experimental techniques can be used to study transport phenomena in polymers nuclear magnetic resonance imagiug (NMR), UV spectrophotometer, gas chromatography/flame ionization detector (GCMD), high-performance liquid chromatography (HPLC), laser interferometry, gravimetric method and Fourier Transform Infra-Red spectroscopy (FTIR). [Pg.47]

Kok, S.J. (2004) Coupling of Liquid Chromatography and Fourier-Transform Infrared Spectroscopy for the Characterization of Polymers. Ph.D. thesis. University of Amsterdam, Amsterdam. [Pg.288]