Figure 5. actual weight % PVP plotted against average qNMR weight % PVP in copolymers with PVAc. Error bars represent 95% CI with n = 5

From

The Characterization of Poly n-Vinyl Pyrrolidone-Polyvinyl Acetate (PVP-PVAc) Copolymers and Blends by Nuclear Magnetic Resonance Spectroscopy, Fourier Transform Infrared Spectroscopy, and Elemental Analysis

Ronald P. D’Amelia, Joseph Mancuso, William Nirode

Journal of Polymer and Biopolymer Physics Chemistry. 2019, 7(1), 1-9 doi:10.12691/jpbpc-7-1-1