Ultraviolet and Infrared Spectral Studies of Polyvinylpyrrolidone¹

The Adsorption of Polyvinylpyrrolidone on Kaolinite Saturated with Sodium Chloride

“…Absorbance of the carbonyl in PVP at 1661 cm −1 is (23). In this study, adsorption of PVP on saturated kaolinite, we detected no shift in the carbonyl frequency (Figs.…”

Characterization of blends of poly(vinyl chloride) and poly(N-vinyl pyrrolidone) by FTIR and13C CP/MAS NMR spectroscopy

“…[21][22][23][24][25][26] The fact that the bandwidth of 35 cm Ϫ1 of this band is extraordinarily large could be indicative of strong intramolecular interactions between the amide groups of PVP as proposed by Rothschild. 25 Shown in Figure 2 are the FTIR spectra of PVP and its blends with PVC in the range of 1,550 ϳ 1,750 cm Ϫ1 .…”

Grafting CVD of Poly(vinyl pyrrolidone) for Durable Scleral Lens Coatings

“…The latter result supports the theory that the total quantity of monomer delivered to the surface controls the deposition thickness. [32] Additionally, h o is correlated with t i with confidence level >95%. This can be seen by comparing samples I, IV, VI, and VII to X, XI, XIII, and XVI in Figure 3; on average the first set is higher in h o than the second set.…”

“…[31,32] A 2 4 fractional factorial experiment was designed to understand the relationships among three variables studied (t i , t UV , t m ) and a fourth variable, the monomer flow rate, f ( Table 2). Long term studies of contact angle stability and thickness retention are quite time consuming, therefore a fractional factorial [33] was chosen as a highly efficient experimental design to study three factors and their interactions simultaneously, where there were two levels (high and low) for each factor.…”