The behaviour of poly(vinyl methyl ether) (PVME) in water has been studied
in detail. A molecular complex with maximum two molecules of water per repe
ating unit is formed. The glass transition temperature of this complex is -
58 degrees C. Additional water plastisises and hydrates the complex. This c
onclusion is based on the detailed analysis of the concentration dependence
of the glass transition of the system and melting behaviour of water. A si
milar behaviour is found with the chemical networks, obtained by radiation
cross-linking. (C) 2000 Elsevier Science Ltd. All rights reserved.