碱性白炭黑/NBR/HNBR复合材料在车用耐油胶管中的应用研究

Application research of alkaline white carbon black/NBR/HNBR composites in automotive oil-resistant hose

以丁腈橡胶(NBR)为主体材料,氢化丁腈(HNBR)为改性剂,选用NBR/HNBR并用比为80/20,研究了新型材料碱性白炭黑、超细滑石粉、纳米纤维粉等对并用胶性能的影响。结果表明,碱性白炭黑胶料的伸长率最大,其拉伸强度、撕裂强度稍小于N550胶料,但明显大于超细滑石粉、纳米纤维粉;老化后拉伸强度变化率为+11%,伸长率变化率为-7.3%,硬度变化值为+4邵A,压缩永久变形为20.4%;经高温耐油后,拉伸强度、伸长率及体积变化率分别为+0.6%、-12.5%、-2.91%;胶料的各项物性远高于耐油胶管内层胶的性能指标,同时在优化成本,降低混炼能耗,减少环境污染等方面具有明显的优势。

Used nitrile rubber （NBR） as the main material, hydrogenated nitrile （HNBR） as the modifer, and NBR/HNBR with ratio 80/20, the effect of new materials such as alkaline white carbon, ultrafne talc, nanofber on the properties of the blended rubber were studied. The results show that the alkaline white carbon black rubber compound has the highest elongation, and its tensile strength and tear strength are slightly smaller than N550 rubber compound, but signifcantly larger than ultrafne talcum powder and nanofber powder. The tensile strength change rate, elongation change rate, hardness change value and compression set of the alkaline white carbon black compound is respectly ＋11%, -7.3%, ＋4 Shore A, and 20.4% after aging. After the high temperature oil resistance of the alkaline white carbon black rubber, the tensile strength, elongation and volume change rate are ＋0.6%, -12.5%, -2.91% respectively. The physical properties of the rubber compound are much higher than the performance index of the inner rubber layer of the oil resistant hose, and at the same time, it has obvious advantages in optimizing costs, reducing mixing energy consumption, and reducing environmental pollution.