Relationships between Polyurethane Elastomer Structure and Ageing Properties: Part 2: Effect of Backbone Polyol
EXPLOSIVES RESEARCH AND DEVELOPMENT ESTABLISHMENT WALTHAM ABBEY (UNITED KINGDOM)
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The effects of changes in the chemical structure of polyurethanes are being studied in order that elastomers possessing a satisfactory balance between resistance to ageing and initial mechanical properties may be prepared. The present investigation considers the effects of varying the backbone polyol on the ageing properties of polyurethane elastomers, using a variety of polyether and polyester polyols of molecular weights 650 - 2000 in toluene di-isocyanate TDI prepolymers crosslinked with 1,1,1-trimethylol propane TMP. In addition, a hydroxyl-terminated polybutadiene urethane elastomer together with a hydroxyl-terminated polybutadiene-polyether blend, were assessed for comparison.
- Elastomers and Rubber