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Quantitative Analysis of Copolymers and Blends of Polyvinyl Acetate (PVAc) Using Fourier Transform Infrared Spectroscopy (FTIR) and Elemental Analysis (EA)

Ronald P. D’Amelia, Samantha Gentile, William F. Nirode, Ling Huang

World Journal of Chemical Education. 2016, 4(2), 25-31 doi:10.12691/wjce-4-2-1
  • Figure 1. The FTIR spectrum of polyethylene (PE). The characteristic PE absorbance bands are located at 2914 cm-1, 2847 cm-1, 1470 cm-1 (blue shaded peak), and 718cm-1. The underline absorbance bands are used to identify & quantify the presence of PE
  • Figure 2. The FTIR spectrum of Polyvinyl Acetate (PVAc). The PVAc absorbance exhibited strong acetate ester carbonyl bands at 1728 cm -1 (brown shaded peak). Other peaks are: 1433 cm-1, 1370cm-1, 1224 cm-1, and 1016 cm-1. The underline absorbance bands are used to identify & quantify the presence of PVAc
  • Figure 3. The FTIR spectrum of poly n-vinyl pyrrolidione (PVP). The major characteristic PVP absorbance band was 1650 cm-1 brown shaded peak)
  • Figure 4. The FTIR spectrum of polyethylene-polyvinyl acetate copolymer (EVAc) having a 33% vinyl acetate content
  • Figure 5. The FTIR spectrum of poly n-vinyl pyrrolidone –polyvinyl acetate copolymer (PVP-PVAc) having a 50% vinyl acetate content
  • Figure 6. A plot of the experimental % PVAc vs the nominal % of PVAc provided by SP2
  • Figure 7. A plot of the EVAc peak area ratio from the 1236 cm-1 & 1467cm-1 vs the % PVAc
  • Figure 8. A plot of the EVAc peak area ratio from the 1735 cm-1 & 720 cm-1 vs the % PVAc
  • Figure 9. A plot of the EVAc peak area ratio from the 1020 cm-1 & 720 cm-1 vs the % PVAc
  • Figure 10. A plot of the experimental % PVP vs the nominal % of PVP in the PVP-PVAc Copolymer
  • Figure 11. A plot of the weight % PVP vs the ratio of the peak area absorbance form the 1667 cm-1 peak from the carbonyl group on the PVP and the 1231 cm-1 peak from the C-O peak from the PVAc
  • Figure 12. A plot of the weight % PVP vs the ratio of the peak area absorbance form the 1667 cm-1 peak from the carbonyl group on the PVP and the 1735 cm-1 peak from the carbonyl peak from the PVAc
  • Figure 13. A plot of the absorbance ratios of the carbonyl 1667 cm-1 peak for the PVP component and the ether 1231 cm -1 peak from the PVAc component versus the weight % of PVAc