Blends containing polyacetal and poly(vinyl phenol) were prepared by melt compounding and investigated with respect to dynamic mechanical behaviour, melting behaviour, density and morphology. Evidence of complete miscibility was provided by a single, composition-dependent glass transition temperature intermediate between those of the pure components and a substantial depression of the melting point of the crystalline phase. Analysis of the melting point depression yielded an approximate interaction parameter, which was in excellent agreement with that obtained from the calorimetric mixing of chemical analogs. Also, the observation of a significant negative volume of mixing supported miscibility. The emergence of a banded spherulitic texture upon blending was also noted. The overall thermal behaviour of this miscible system was shown to conform to the theoretical model of Kumar and Yoon.
Посилання на статтю:
Miscible polyacetal-poly(vinyl phenol) blends: 2. Thermomechanical properties and morphology / J. M. Machado* and R. N. French // Polymer. – 1992. – Vol 33. – P. 760-766.