Sorption Properties of Materials Based on Polyvinylpyrrolidone Copolymers

Abstract

Sorption properties of polyvinylpyrrolidone copolymers regarding to different acid-base indicators, as well as heparin and iodine have been investigated. The amount of sorption active centers of synthesized copolymers depends upon synthesis conditions, namely upon temperature and initiator amount, and is determined by the nature of sorbates and copolymers functional groups.

Regularities of Films Forming on the Basis of Polyamide-Polyvinylpyrrolidone Mixtures

“…1. Before the experiments the films 1 and 2 were dried under vacuum at 328±5 K.* -sample was washed out from the mixture obtained at mixing PA in a plastic state [9] At the hydrothermal treatment of the films at 368 K we also observed the decrease of strength and the increase of deformation (Table 2, No. 1, 2).…”

“…Among modification methods of polymeric materials the physical methods are of special interest because they give the possibility to create the materials with specific properties without essential financial expenses. Such modification allows to directly change the individual parameters of existing commercial polymers and to extend the area of their application in such a way [8,9]. The most perspective way of modification is creation of polymer-polymeric compositions.…”