Dielectric studies on the miscibility in poly(vinyl acetate)/ poly(ethyl methacrylate) blends

✍ Scribed by Madalena C. S. Dionisio; Joaquim J. Moura Ramos; Anabela C. Fernandes

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 505 KB
• Volume: 60
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19960509)60:6<903::aid-app14>3.0.co;2-x

✦ Synopsis

The glass transition relaxations of different blends of poly(viny1 acetate) and poly(ethy1 methacrylate) have been investigated by dielectric relaxation spectroscopy in the frequency range from 20 Hz to 1 MHz. The obtained results suggest that the poly(viny1 acetate)-rich blends show immiscibility between the two components, whereas the poly(ethy1 methac-ry1ate)-rich blends show partial miscibility. The results obtained by differential scanning calorimetry and the analysis of the Maxwell-Wagner-Sillars effect seem to confirm the dielectric relaxation results.