Authors Ziemer, A. ; Eichhorn, K.-J. ; Adam, G. ; Froeck, C. ; Voit, B. ; Kreitschmann, M. ; Kierkus, P.
Title Temperature Dependent Studies of Molecular Interactions in a Low-Molecular Weight Ester Diol Mixed with a Hyperbranched Polyester Additive
Date 12.08.2003
Number 11097
Abstract In this paper the influence of the hyperbranched polyester based on 4,4-bis(4-hydroxyphenyl)valeric acid on the properties of an ester diol oligomer will be discussed. The hyperbranched polyester was added to an ester diol in different amounts and the resulting bulk viscosity values were measured. Surprisingly, the resulting viscosity depends on the mixing temperature of both substances. Glass transition temperatures gave an idea about the phase behavior in the blend. H bond formation in the ester diol was intensively studied by temperature dependent IR measurements. The weakening of H bonds in the ester diol oligomer with increasing temperature was proven by IR measurements and correlates with results from viscosity measurements. These changes allow increased interactions between the ester diol and the hyperbranched polyester which causes different viscosity values depending on the mixing temperature. The overall changes in the behavior of the mixture were proven by temperature dependent AFM measurements.
Publisher Macromolecular Chemistry and Physics
Wikidata Q57778149
Citation Macromolecular Chemistry and Physics 204 (2003) 1275-1283
Tags afm ft-ir hyperbranched polyesters viscosity dendritic polymers force microscopy melt viscosity blends rheology dendrimers behavior acid polymerization macromolecules

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