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以金红石型纳米TiO2为添加剂改善了CaSO4晶须/PP-R树脂复合材料的各项性能,并研究了金红石型纳米TiO2对PP-R树脂的力学性能、耐热性能和紫外老化性能的影响。研究结果表明:由于纳米TiO2和CaSO4晶须的协同作用,添加纳米TiO2后可进一步提高CaSO4晶须/PP-R树脂复合材料的力学性能和耐热性能;金红石纳米TiO2的加入可以大幅度提高PP-R树脂的耐紫外老化性能,添加5%纳米TiO2后的CaSO4晶须/PP-R树脂复合材料经紫外辐射72 d后,其拉伸强度仅下降了0.36MPa,冲击强度仅下降了0.36kJ.m-2,熔融温度仅下降了5.4℃;而未添加纳米TiO2的CaSO4晶须/PP-R树脂复合材料的拉伸强度下降了1.96MPa,冲击强度下降了1.47kJ.m-2,熔融温度下降了18.6℃。
The properties of CaSO4 whisker / PP-R resin composites were improved by using rutile nano-TiO2 as additive, and the mechanical properties, heat resistance and UV aging properties of rutile nano-TiO2 were studied. The results show that the mechanical properties and heat resistance of CaSO4 whiskers / PP-R resin composites can be further enhanced by the addition of nano-TiO2 due to the synergistic effect between nano-TiO2 and CaSO4 whiskers. The addition of rutile nano-TiO2 can greatly improve the mechanical properties -R resin, the tensile strength of CaSO4 whisker / PP-R resin composite with 5% nano-TiO2 decreased by only 0.36MPa and the impact strength decreased by only 0.36kJ .m-2, the melting temperature decreased by only 5.4 ℃. The tensile strength of CaSO4 whisker / PP-R resin without nano-TiO2 decreased by 1.96MPa and the impact strength decreased by 1.47kJ.m-2, The temperature dropped by 18.6 ° C.