CaSO₄晶须/天然橡胶复合材料的制备与性能研究

Study on Properties and Preparation of Caso4-Whisker/Rubber Composites

摘要: 用KH-560表面接枝处理CaSO₄晶须，采用母炼胶法制备了CaSO₄晶须/天然橡胶复合材料。研究了CaSO₄晶须/NR复合材料的力学、磨耗及动态力学性能，与未处理的CaSO₄晶须/NR复合材料性能比较，发现CaSO₄晶须经表面接枝处理后，复合材料的拉伸强度、撕裂强度、300%定伸应力和邵尔A硬度均有提高，断裂伸长率和磨耗量减小，且横向磨损量比纵向小，其中经KH-560处理的晶须添加量为3份时复合材料横向磨损量为0.6499 cm⁻³/1.61km，磨耗性能最佳，而基体橡胶磨损量为0.7372 cm−3/1.61km。并用SEM对橡胶磨屑和橡胶磨损表面形貌用进行了分析；DMA表明CaSO4晶须经KH-560表面接枝处理后界面作用增强。

Abstract: In the experimental test CaSO₄-whisker being treated by agent KH-560 has been added to the rubber com-posites. The mechanical properties, abrasion and attrition behavior and dynamic mechanical properties of the rubber composites have been studied, comparing with the rubber composites adding the CaSO₄-whisker without coupling agent KH-560. The SEM patterns of abrasive dust and the rubber composites worm surface were analysed. The experiments showed that adding CaSO₄-whisker being treated by coupling agent KH-560 to rubber composites got better interfacial adhesion，wear resistant, tensile strength, tear strength, stress at 300% elongation and shore hardness. Then wear resis-tant of rubber composites adding 3% CaSO₄-whisker (weight ratio of the whisker to the rubber) being treated by cou-pling agent KH-560 was the best (0.6499 cm−3/1.61km, compared with 0.7372 cm−3/1.61km of rubber composites without CaSO₄-whisker). DMA indicates that rubber composites adding CaSO₄-whisker being treated by agent KH-560 have better interface adhesion than rubber composites adding CaSO₄-whisker without treated.