聚丙烯腈改性碳纳米管/氢化丁腈橡胶复合材料的制备及性能

摘要

The polyacrylonitrile modified carbon nanotubes (PAN-CNTs) were prepared by in-situ polymerization and the hydrogenated nitrile rubber (HNBR) composites were prepared with PAN-CNTs as filler.The curing characteristics,mechanical properties at room temperature and high temperature,phase morphology of HNBR filled with PAN-CNTs were investigated,respectively.The high temperature and high pressure oil immersion tests were carried out with the oil field packer rubber tube which was made from the composites.The results showed that with increasing amounts of PAN-CNTs,the scorching time and optimum curing time of HNBR compounds shortened gradually,the minimum torque and maximum torque increased,the tensile strength and tear strength of HNBR composites increased first and then decreased,while the elongation at break decreased.Although the mechanical properties of the composites at high temperature decreased,when the PAN-CNTs was 30 phr,the tensile strength of the composite at 150 ℃ was still as high as 18 MPa,and Shore A hardness was 88.PAN-CNTs were dispersed uniformly in rubber.The packer rubber tube performed well at high temperature and high pressure.%以原位聚合法制备的聚丙烯腈改性碳纳米管(PAN-CNTs)为填料,制备了氢化丁腈橡胶(HNBR)复合材料,考察了PAN-CNTs对复合材料硫化特性、室温及高温物理机械性能的影响,表征了复合材料的相态形貌,并将复合材料所制成的油田封隔器胶筒进行了高温高压油浸模拟试验.结果表明,随着PAN-CNTs用量的增加,HNBR混炼胶的焦烧时间和正硫化时间逐渐缩短,最小转矩和最大转矩逐渐增大,复合材料在室温下的拉伸强度和撕裂强度均先提高后下降,扯断伸长率降低;复合材料在高温下的物理机械性能有所下降,但PAN-CNTs用量为30份时,150℃下复合材料的拉伸强度仍高达18 MPa,邵尔A硬度达到88;PAN-CNTs在橡胶中分散均匀;封隔器胶筒耐高温高压性能良好.