Journal
JOURNAL OF MATERIALS SCIENCE
Volume 43, Issue 15, Pages 5274-5281Publisher
SPRINGER
DOI: 10.1007/s10853-008-2789-5
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Polyurethane elastomers with potential for applications in damping bearings were synthesized with 1,6-hexamethylene diisocyanate, 4,4'-methylenebis-(phenylisocyanate), poly(1,4-butane)diols (Terathane 1400), 1,4-butane diol 1,6-hexane diol and glycerin chain extenders. The glass-transition temperatures of the materials ranged from -42 to -75 C and were higher for polymers based on 4,4'-methylenebis-(phenylisocyanate) and with higher hard segment (HS) contents. The tensile strengths of the materials were 20-55 MPa and the tensile moduli were 30-134 MPa. These increased with increasing HS content. Interchain cross-linking improves thermal stability, which was measured by thermogravimetric analysis and differential scanning calorimetry. The structure and amount of HS used causes a significant variation in the properties of cross-linked elastomers.
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