Development of interchange reactions in ternary PBT-PC/phenoxy blends
Article first published online: 10 MAR 2003
Copyright © 1991 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 42, Issue 6, pages 1639–1645, 20 March 1991
How to Cite
Remiro, P. M. and Nazábal, J. (1991), Development of interchange reactions in ternary PBT-PC/phenoxy blends. J. Appl. Polym. Sci., 42: 1639–1645. doi: 10.1002/app.1991.070420618
- Issue published online: 10 MAR 2003
- Article first published online: 10 MAR 2003
- Manuscript Accepted: 19 JUN 1990
- Manuscript Received: 20 APR 1989
Ternary PBT-PC/phenoxy blends were melt mixed for periods of time up to 110 min to determine the development of interchange reactions among the blend components. This development was evaluated by means of solvent extraction and DSC measurements on blends obtained after characteristic blending times shown in the torque vs. blending time curve. PBT reacts, after very short blending times and, probably due to residual catalyst, mainly with phenoxy. Although at high phenoxy contents a single torque peak is observed, at low phenoxy contents two peaks are observed that correspond to the two stages in which the reaction takes place: at the beginning in the phenoxy-rich phase and later in the overall blend.