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采用硬脂酸对氧化铈(CeO2)进行表面改性,并分别将CeO2和改性CeO2掺混到氯丁橡胶(CR)中,制得CeO2/CR和改性 CeO2/CR 复合材料.通过SEM、FT-IR、XRD 对改性 CeO2的结构进行了表征,研究了 CeO2/CR 和改性 CeO2/CR 复合材料的硫化性能、力学性能、耐老化性能和热稳定性.结果表明,改性 CeO2的晶型结构未发生改变并在其表面生成了硬脂酸铈盐.与添加未改性 CeO2相比,添加改性CeO2使CR的正硫化时间缩短了9.7%,CR 的力学性能、耐老化性能和热稳定性有不同程度的提高.

Surface modification process of cerium oxide (CeO2 )by stearic acid was investigated,CeO2 and modi-fied CeO2 reinforced neoprene (CR)was prepared by means of mixing.The structure of modified CeO2 was characterized by SEM,FT-IR and XRD,vulcanization properties,mechanical properties,aging resistance and thermal stability of CeO2/CR and modified CeO2/CR composite materials were evaluated.Results showed that crystal structure of modified CeO2 was not changed by modification process and stearate salt was generated on the surface.Compared with added unmodified CeO2 ,vulcanization time of CR was shortened by 9.7%,the me-chanical properties,aging resistance and thermal stability of CR enhanced in varying degrees by adding modified CeO2 .

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