Abstract
Poly(esterurethane) elastomers were synthesized by a pre-polymer process. The pre-polymer based on poly(caprolactone) (capa-225) and toluene-diisocyanate (TDI) was mixed with 1,4-butane diol (BDO) or dihydroquinone (HQ) in capa-225 (known as the quasi pre-polymer process) and then reacted in a mould. Mechanical and thermal properties of the elastomers synthesized were investigated using a tensometer, Shore hardness tester, differential scanning calorimeter and dynamic mechanical analysis. The chemical resistance of the samples was measured by a toluene immersion test. The properties of the samples containing HQ and BDO as chain extenders are compared. The ultimate tensile strength, Young’s modulus, hardness and chemical resistance of the HQ samples are higher than those of the BDO samples. Substitution of HQ for BDO results in a decrease in elongation at break and heat resistance of the samples. © 1998 SCI.
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