Temperature‐responsive swelling and deswelling of the copolymers from vinyl ether of ethylene glycol and butyl vinyl ether

Abstract

Linear and crosslinked copolymers of a vinyl ether of ethylene glycol (2-hydroxyethyl vinyl ether, (1)) and butyl vinyl ether (2) are synthesized by y-irradiation polymerization. It is shown that the linear copolymers exhibit a phase separation phenomenon in dependence of the temperature due to the destruction of hydrogen bonds and the enhancement of hydrophobic interaction in aqueous solution. The processes of reversible swelling or shrinking upon temperature change are demonstrated for polymer networks.

Effect of copolymer composition on interpolymer complex formation of (co)poly(vinyl ether)s with poly(acrylic acid) in aqueous and organic solutions

“…9,10) Poly(acrylic acid) with M -w = 2.5 N 10 5 was purchased from Polyscience Corp. and was used without further purification.…”

Temperature‐Responsive Water‐Soluble Copolymers Based on 2‐Hydroxyethyl Acrylate and Butyl Acrylate

“…Earlier similar random copolymers were synthesised by us using copolymerisation initiated by gamma-radiation. [17][18][19] The copolymerisation of hydrophobic vinyl ether with hydrophilic vinyl ether may result in the preparation of thermosensitive system but the synthesis of these copolymers is rather complicated and requires using protection/deprotection chemistry or ionising radiation. From practical point of view this kind of synthesis is quite costly and the possibility to find a new hydrophilic monomer-hydrophobic monomer pair, which exhibits temperature-sensitivity and can be easily copolymerised is rather challenging.…”

Design of composite films and ultrathin membranes of interpolymer complexes

“…7). The appearance of a minimal swelling degree at 22°C for IPC film and minimum of viscosity at 40°C for IPC solution can be explained by existing of a definite phase separation temperatures for copolymers 3a± 3d themselves [17]. The effect of IPC composition on the swelling degree of films composed of 2a and 3d in water and ethanol is shown in Fig.…”