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SYNTHESIS AND PROPERTIES OF THERMOPLASTIC POLYURETHANES WITH ISOSORBIDE CHAIN EXTENDER

Published

Author(s)

Fan Zhang, Ivan Javni, Olivera Bili?, Nikola Bili? , Zoran S. Petrovic, Jan Ilavsky

Abstract

Isosorbide, a renewable diol derived from starch, was used in combination with butane diol or alone as the chain extender in two series of thermoplastic polyurethanes with 50 and 70% soft segment concentration (SSC). Polyurethanes with 50% SSC based on polytetramethylene ether glycol (PTMEG) and chain extender/diphenyl methane diisocyanate hard segments were hard elastomers with Shore D hardness of around 50, which is consistent with assumed co-continuous morphology. Polymers with 70% SSC displayed lower Shore A hardness of 74-79 (Shore D around 25) as a result of globular hard domains dispersed in the soft matrix. The objective of the study was to examine the effect of chain extenders on properties of segmented polyurethane elastomers with different morphologies. Insertion of isosorbide increased rigidity, melting point and glass transition of hard segments and tensile strength of elastomers with 50% SSC. These effects were weaker or non-existent in 70% SSC series due to the short hard segments and low content of isosorbide. Thermal stability was lowered by increasing isosorbide content in both series.
Citation
European Polymer Journal
Volume
132
Issue
47

Citation

Zhang, F. , Javni, I. , , O. , , N. , Petrovic, Z. and Ilavsky, J. (2015), SYNTHESIS AND PROPERTIES OF THERMOPLASTIC POLYURETHANES WITH ISOSORBIDE CHAIN EXTENDER, European Polymer Journal, [online], https://doi.org/10.1002/app.42830 (Accessed April 18, 2024)
Created August 28, 2015, Updated November 10, 2018