Improvement in ionic conductivities of poly-(2-vinylpyridine) by treatment with crotonic acid and vinyl acetic acid

Abstract

The synthesis, characterization and improved ionic conductivities of the salts of poly-(2-vinylpyridine) with crotonic acid and vinyl acetic acid are reported here. In this study, the alternating current conductivity measurements were carried out within the temperature range of 30-90 • C and the frequency range of 1 Hz-100 kHz in solid state. A two-to three-fold increase in conductivity was observed for vinyl acetic acid salt whereas one-to twofold increase was observed for crotonic acid salt. The ionic transport numbers of the salts were measured with the help of the Wagner polarization technique which reveals that the percentage of ionic character of the salts are significantly higher compared with the polymer. The percentage of water uptake by the polymer and its salts were also observed.

Synthesis and Characterization of Poly(2-vinylpyridine) and Poly(4-vinylpyridine) with Metal Oxide (TiO2, ZnO) Films for the Photocatalytic Degradation of Methyl Orange and Benzoic Acid

“…The C = N absorption peaks are assigned at 1598 cm −1 and 1557 cm −1 for P(4-VP) while those at 1589 cm −1 and 1568 cm −1 for P(2-VP) are due to the stretching vibration of the pyridine ring [ 45 ]. Moreover, the absorption bands at 1449 cm −1 and 1413 cm −1 for P(4-VP), as in the case of P(2-VP) at 1471 cm −1 and 1433 cm −1 , appeared as result of the ring stretching vibration C = C. Finally, absorption bands at 819 cm −1 and 746 cm −1 for P(4-VP) and P(2-VP) were attributed to out-of-plane ring C–H bending and that around 1068 cm −1 can be assigned to the in-plane C–H bending [ 38 , 46 ].…”

Synergetic Effect of Dual Functional Monomers in Molecularly Imprinted Polymer Preparation for Selective Solid Phase Extraction of Ciprofloxacin

“…The corresponding DSC thermogram of the imprinted polymer (MIP7) showed two endothermic peaks at 97 and 183 °C, which were due to removing adsorbed water and entrapped solvent molecules. The prominent endothermic peak at 365 °C might be due to the loss of pyridine and CO 2 molecules [ 54 ]. The final endothermic peak at 431 °C could be explained by the pyrolysis with carbonization of the backbone.…”

Surface-Conformal Triboelectric Nanopores via Supramolecular Ternary Polymer Assembly

“…When the weight fraction of APEO in STENFs increased, the peak intensities of C–O–C stretching at 1060 cm –1 were increased while those of CN bonding at 1474 cm –1 were decreased as expected (Figure S13). , Considering that spherical micelles and cylindrical nanostructures were developed in the thin spin-coated films of binary SPS:P2VP and SPS:APEO blends, respectively (Figure a,f), , one can assume that the curvature of the intermaterial dividing surface (IMDS) of the SPS:P2VP assembly is larger than that of the IMDS of SPS:APEO. In this situation, the APEO added in the ternary blend may decrease the curvature of the supramolecular domains, producing core-opened domains, as schematically shown in Figure a.…”