Structural Analysis Of Ethylene/Acrylic And Methacrylic Acid Copolymers Using Fourier Self-Deconvolution Of Infrared Spectra

Matthew A. Harthcock

doi:10.1117/12.970791

20 December 1985 Structural Analysis Of Ethylene/Acrylic And Methacrylic Acid Copolymers Using Fourier Self-Deconvolution Of Infrared Spectra

Matthew A. Harthcock

Author Affiliations +

Proceedings Volume 0553, Fourier and Computerized Infrared Spectroscopy; (1985) https://doi.org/10.1117/12.970791
Event: 1985 International Conference on Fourier and Computerized Infrared Spectroscopy, 1985, Ottawa, Canada

Abstract

Fourier self-deconvolution (FSD) has been applied to several regions of the infrared spectra of ethylene/acrylic and methacrylic acid copolymers to obtain detailed information on the structure of these copolymers. The computer assisted technique has been applied to the 1050-830 cm-1 region of the infrared spectrum of the copolymers to resolve the vinyl (909 cm-1) and vinylidene (887 cm-1) CH2 wagging vibrations from the in-phase out-of-plane hydrogen deformation vibration of the acid dimer (943 cm-1). The technique was applied to the carbonyl stretching vibration region (1820-1660 cm-1) to study the structure of the acid groups. Two distinct hydrogen bonded (1710 and 1696 cm-1) and free (1758 and 1745 cm-1) acid group structures were observed for the 9% acrylic acid copolymers, while the methacrylic acid copolymer showed predominantly one hydrogen bonded (1696 cm-1) and one free (1758 cm-1) acid group structure. Also, the 6.5% acrylic acid copolymers showed essentially one type of hydrogen bonded (1706 cm-1) carbonyl and two free carbonyl stretching absorptions (1758 and 1745 cm-1).

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Matthew A. Harthcock "Structural Analysis Of Ethylene/Acrylic And Methacrylic Acid Copolymers Using Fourier Self-Deconvolution Of Infrared Spectra", Proc. SPIE 0553, Fourier and Computerized Infrared Spectroscopy, (20 December 1985); https://doi.org/10.1117/12.970791

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