Mechanical properties of polyether polyurethane elastomer
The cast polyurethane elastomer was synthesized by one-step method using ordinary propylene oxide polyether polyol and MDI series isocyanates,and the effects of soft segment and hard segment on the mechanical properties of materials were investigated.The experiment found that when the blending ratio of polyether polyols was changed,the physical and mechanical properties of polyurethane materials would first increase and then decrease with the increase of high activity 330 N content.When the mass ratio of high activity polyether polyol 330 N to ordinary polyether polyol PPG220 was 10∶90,the comprehensive mechanical properties were good.The polyurethane elastomers were synthesized using different alcohol chain extenders BDO,DEG,and EG.The mechanical properties of polyurethane elastomers using EG as a chain extender were the best.The performance of polyurethane elastomers synthesized using 100 LL diisocyanate was better than that of MDI50 and modified MDI.When the mass fraction of anti-aging agent added was above 0.4％,the anti-aging performance was good.
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