ATR-FTIR spectroscopy study of the photodegradation protective properties of BP-4 and 4HBP in polyvinyl acetate thin films

Tracing Poly(Vinyl Acetate) Emulsions by Infrared and Raman Spectroscopies: Identification of Spectral Markers

“…So far, several studies have used different techniques for the molecular characterisation of VAc-based films and paints [7,[14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Within these studies, Fourier transform infrared spectroscopy (FTIR) [7,15,18,20,21,[23][24][25][27][28][29] and pyrolysis-gas chromatography and mass spectrometry (Py-GC/MS) [14][15][16][17][21][22][23]26,27] have been highly used, but other techniques such as size exclusion chromatography (SEC) [7], atomic force microscopy (AFM) [19], scanning electron microscopy-energy-dispersive X-ray microanalysis (SEM/EDX) [20] and UV-Vis spectroscopy [20], differential scanning calorimetry (DSC) [18], thermo-gravimetric analysis (TGA) [18], mechanical properties test [18] have also been used, among others. Still, most of these studies have been individually focused on a narrow set of PVAc compositions (smaller variabi...…”

Effect of pH on the properties of protonated polyaniline‐based films for pH sensing applications

“…Therefore, PANI/PVAc films can remain stable in acidic and neutral solutions for at least 30 min. In addition, at pH 10.0, the two peaks that may be related to the CH stretching vibrations at ~980 and 860 cm −1 (1 min) shifted to 950 and 840 cm −1 (30 min) and to 830 cm −1 (60 min), respectively 49,50 . Based on a previous study, these changes in the peak location and intensity were attributed to the partial hydrolysis of PVAc to PVA 51 .…”

“…In addition, at pH 10.0, the two peaks that may be related to the C H stretching vibrations at $980 and 860 cm À1 (1 min) shifted to 950 and 840 cm À1 (30 min) and to 830 cm À1 (60 min), respectively. 49,50 Based on a previous study, these changes in the peak location and intensity were attributed to the partial hydrolysis of PVAc to PVA. 51 The peak corresponding to the ketone group confirmed the presence of PVAc after immersion for 60 min in the pH-10.0 buffer solution.…”

Building a UV filter and interfacial bridge with a multifunctional molecule for enhancing the performance and stability of MAPbI3 solar cells

“…It has been reported that the adjacent -OH groups and the carbonyl group (CQO) of BP-4 can form intramolecular hydrogen bonds and a chelate ring. 33 When exposed to UV light, BP-4 absorbs the photon energy and undergoes photoenolization by breaking the intramolecular hydrogen bonds, opening the chelate ring, and forming an enol structure (Fig. 1a).…”