Ethylene Vinyl Acetate Infrared Spectrum
Among the several different absorption ratios proposed in literature the intensities ratio i 610 i 2680 c o ch 2 was chosen to evaluate the amount of.
Ethylene vinyl acetate infrared spectrum. Conclusion from the aforementioned examples it is evident that raman spectroscopy is a powerful technique for polymer analysis both in laboratory settings and on the process line. 5 nmr 6 ftir and 2 raman. Acetic acid vinyl ester. Direct determination of vinyl acetate content of ethylene vinyl acetate copolymers in thick films by infrared spectroscopy.
Ethylene vinyl acetate eva also known as poly ethylene vinyl acetate peva is the copolymer of ethylene and vinyl acetate the weight percent of vinyl acetate usually varies from 10 to 40 with the remainder being ethylene. The a 3460 a 3610 ratio was used for the quantitative analysis. Spectral changes in the raman spectra of eva with increasing lamination time which equals increasing degree of cross linking were mainly detected in the ch vibrational regions namely in. This structure is also available as a 2d mol file or as a computed 3d sd file the 3d structure may be viewed using java or javascript.
Polymer testing 1999 18 7 551 557. Xtxrwkrvritetp uhfffaoysa n cas registry number. The technique is simple quick and does not require a complicated sample preparation procedure. An infrared spectroscopic method was developed for the determination of vinyl acetate content in thick films of ethylene vinyl acetate copolymers.
Compound ethylene vinyl acetate copolymer with free spectra. Infrared spectroscopy is used to determine the vinyl acetate incorporation into eva copolymers using the ratio between the characteristic band of acetoxy group and ethylene sequences. There are three different types of eva copolymer which differ in the vinyl acetate va content and the way the materials are used.