新型耐老化聚氨酯弹性体的制备和性能

以聚己内酯二元醇(PCL)、甲苯二异氰酸酯和扩链剂E-300为原材料,通过预聚体法制备了一种耐水解聚氨酯弹性体.探讨了水解稳定剂、防酶剂、紫外线吸收剂和抗氧剂等助剂对聚氨酯弹性体性能的影响,测定了PCL型聚氨酯弹性体的耐湿热老化、耐紫外线和耐海水性能.结果表明,通过添加适量的水解稳定剂、防霉剂、紫外线吸收剂和抗氧剂可大幅度提高PCL型聚氨酯弹性体的耐湿热老化和耐紫外线老化性能,特别是耐海水性能较传统的聚酯型聚氨酯弹性体提高了5倍以上.

Preparation and Properties of the New Ageing Resistance Polyurethane Elastomer

Anti-hydrolyzing polyurethane elastomer was synthesized from Polycarbonafe diols(PCL),2,4-tolylene diisocyanate(TDI)and chain extender(E-300) by prepolymerizing.The effects of the hydrolytic stabilizers,antifungal agents,ultraviolet stabilizers and anti-oxidant on the properties of the PUR elastomer were discussed.Its properties of resistance to heat and humidity,ultraviolet radiation and sea water were determinated.The results showed that hydrolytic stabilizers,antifungal agents,ultraviolet stabilizers and anti-oxidant,the PUR elastomer's properties of resistance to heat,humidity and ultraviolet radiation were greatly enhanced by adding the appropriate amount.Especially the PUR elastomer's property of resistance to sea water was 5 times more than the traditional elastomer.