Studies of Poly-2-vinylpyridine. II. Solubilities in Various Solvents

Abstract

The viscosity and osmotic pressure of a fraction of poly-2-vinylpyridine have been measured in various solvents, and the parameters concerning the solubility of this polymer, that is, the osmotic have been obtained: poly-2-vinylpyridine has a solubility parameter of ca. 10.4 (cal./cc.)1/2 and acts as an electron donor. As a result of the specific interaction between a solvent and the pyridine nitrogen of this polymer, the solvent power is greater in an acidic solvent and smaller in a basic than would be expected from the solubility parameter alone. An especially strong interaction between poly-2-vinylpyridine and aliphatic alcohols, chloroform and nitroethane has been observed and its nature has been discussed.

Thermal Properties of Polyvinylpyridine Solutions

“…When a solvent is a Lewis acid or can act as an electron acceptor, its solvent power with regard to the polymer may be increased because of solvation. 6 This confirms the obtained results, where higher conduction for P-2VP solutions was observed in ethyl alcohol and acetic acid than in the other solvents.…”

“…These results indicate that the type of solvent, i.e., polymer-solvent interaction, play an important role on the thermal properties behaviour of the investigated system. Previously, the nature of the specific interaction between P-2VP and various types of solvents was reported by Arichi et al 6 The nitrogen atom at the ix-position of the pyridine ring of P-2VP has a lone electron pair and acts as an electron donor, and so P-2VP is quite a strong base. When a solvent is a Lewis acid or can act as an electron acceptor, its solvent power with regard to the polymer may be increased because of solvation.…”

Scanning Force Microscopy as Applied to Conformational Studies in Macromolecular Research

“…It is important to emphasise that P2VP is not soluble in water at normal pH values, but may be dissolved in ethanol. [305] Yet, in the two-dimensional planar geometry the tendency is quite opposite. Indeed, on the contrary, the P2VP molecules extend ('solubility') being surrounded by coadsorbed water molecules but collapse ('insolubility') in the presence of coadsorbed ethanol molecules.…”

Initiated Chemical Vapor Deposition‐Based Method for Patterning Polymer and Metal Microstructures on Curved Substrates

“…iCVD P4VP, like bulk P4VP, is extremely soluble in solvents that act as Lewis acids, such as ethanol. [27][28][29] This is evidenced by the absence of representative peaks observed in the FTIR spectrum for ethanol-developed iCVD P4VP (Figure 1 [ 30 ] These peaks are not observed prior to irradiation. UV-visible spectroscopy data (Figure 1 e) confi rm that functionalized, unexposed P4VP (P4VP-TDA) does not absorb in the range of 350-800 nm.…”