The effect of chain extenders structure on properties of new polyurethane elastomers
- 665 Downloads
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.
KeywordsPolyurethane elastomers Chain extenders Cross-linker Mechanical properties
The author gratefully acknowledges Dr. Mariana Cristea for her assistance with the DMA measurements.
- 1.Hepburn C (1991) Polyurethane elastomers, 2nd edn. Elsevier, LondonGoogle Scholar
- 12.Heijkants GJC, Calck RV, Tienen TG, Groot JH, Buma P, Pennings AJ, Veth PH, Schouten AJ (2005) Uncatalyzed synthesis, thermal and mechanical properties of polyurethanes based on poly(caprolactone) and 1, 4-butane diisocyanate with uniform hard segment. Biomaterials 26:4219–4228CrossRefGoogle Scholar
- 17.Zapletalova T, Michielsen S, Pourdeyhimi B (2006) Polyether based thermoplastic polyurethane melt blown nonwovens. J Eng Fibers Fabr 1:62–72Google Scholar
- 21.Erbil H (1997) Surface tension of polymers in handbook of surface and colloid chemistry. CRC Press, New YorkGoogle Scholar
- 25.Chamberlim Y, Pascault JP (1984) Phase separation kinetics in segmented linear polyurethanes: relation between equilibrium time and chain mobility and between equilibrium degree of segregation and interaction parameter. J Polym Sci Polym Phys 22:1835–1844Google Scholar
- 29.Chang EJ, Kim HH, Huh JE, Kim IA, Seung KJ, Chung CP, Kim HM (2005) Low proliferation and high apoptosis of osteoblastic cells on hydrophobic surface are associated with defective Ras signaling. Exp Cell Res 303(1):197–206Google Scholar
- 30.Erbil HY (2006) Surface chemistry of solid and liquid interfaces. Blackwell, OxfordGoogle Scholar