The effect of chain extenders structure on properties of new polyurethane elastomers |
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Authors: | Stefan Oprea |
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Affiliation: | (1) “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda No. 41-A, 700487 Iasi, Romania |
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Abstract: | Two series of polyurethane elastomers were synthesized to investigate what effect does the incorporation of various new chain
extenders have on the mechanical and thermal properties of polyurethane elastomers. The polyurethane soft segments were based
on poly(ε-caprolactone) polyol. The hard segment was based on 1,6-hexamethylene diisocyanate in combination with 2,5-dimethyl-3-hexine-2,5-diol
(DHD), hexaethylene glycol, glycerin, or castor oil. The results showed that the degradation rate and mechanical properties
of the final products can be controlled through the structure of diol chain extenders or/and hard segment cross-linking present
in the polyurethane elastomers. The DHD-based polyurethane displayed a relatively low glass transition temperature of −57 °C
and a tensile strength of 11–14 MPa and elongation at break of 600–700%. These kinds of materials have potential application
in many domains. |
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