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Development of interchange reactions in ternary PBT‐PC/phenoxy blends
Author(s) -
Remiro P. M.,
Nazábal J.
Publication year - 1991
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1991.070420618
Subject(s) - ternary operation , materials science , solvent , catalysis , phase (matter) , chemical engineering , polymer chemistry , organic chemistry , chemistry , computer science , engineering , programming language
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.