The transesterification reaction in the molten state of ester groups of ethylene vinyl acetate copolymers and ethylene acrylic ester copolymers, in the presence of dibutyltin oxide as a catalyst, leads to crosslinking of the copolymer chains. The kinetics of this crosslinking reaction has been assessed by two different experimental methods: viscoelastic measurements of the dynamic storage modulus and thermogravimetric analysis coupled with gas chromatography which allows measurement of the evolved methyl acetate which is a volatile product of the crosslinking reaction. The equilibrium storage modulus calculated from theories of elastic modulus has shown that the kinetics of the crosslinking reaction may be determined through variations of the dynamic storage modulus
Посилання на статтю:
Co-crosslinking of ethylene vinyl acetate and ethylene acrylic ester copolymers by transesterification: chemical and rheological studies of kinetics / P. Cassagnau*, M. Bert, V. Verney and A. Michel // Polymer. – 1993. – Vol 34. – P. 124-131.