Dynamic thermomechanical properties of composite polymer films obtained from poly(vinyl acetate) (PVAc) latexes which are sterically stabilized by poly(vinyl alcohol) (PVA) are investigated. These films exhibit dramatic changes in their dynamic mechanical response after annealing. The effects of various parameters (volume fraction and features of PVA in the latex, mean size of the PVAc particles) on this behaviour are discussed. The results are interpreted on the basis of a phase rearrangement during annealing, which results in a strong enhancement of the degree of connectivity of the PVA matrix within the films. Finally, it is shown that qualitative and semiquantitative information can be gained from inspection of dynamic thermomechanical spectra concerning, respectively, the features of the interphase between PVAc particles and the PVA matrix and the actual volume fraction of PVA involved in the continuous matrix.
Посилання на статтю:
Thermomechanical behaviour of composite polymer films obtained from poly(vinyl acetate) latexes sterically stabilized by poly(vinyl alcohol) / J. Richard // Polymer. – 1993. – Vol 34. – P. 3823-3831.