摘要
从胶料配方、表面处理和材料复合改性3个方面优化丁腈橡胶(NBR)耐磨密封制品的关键性能。结果表明:单独使用4,4′-二硫代二吗啉(DTDM)作硫化剂时,NBR胶料的硫化时间较长,压缩永久变形较大,硫黄与硫化剂DTDM并用作硫化剂时,随着硫黄用量的增大,NBR胶料的硫化速度提高,交联密度增大,压缩永久变形先减小后增大,NBR胶料的优化配方为NBR 100,氧化锌5,硬脂酸1,炭黑N33060,促进剂TBBS 1.5,硫化剂DTDM 1.5,硫黄0.5;NBR胶料表面喷涂抗磨聚氨酯涂料无法在本质上减小其摩擦因数,但在NBR密封制品表面喷涂抗磨聚氨酯涂料可以降低制品在装配初期磨损的风险;NBR胶料与聚酯帘布或粘胶纤维帘布复合均可以改善其耐磨性能,其中聚酯帘布/NBR胶料复合材料的摩擦因数更小,较粘胶纤维帘布/NBR胶料复合材料减小44.04%,较表面未喷涂抗磨聚氨酯涂料的NBR胶料减小45.72%。
The key properties of the wear resistant nitrile butadiene rubber(NBR)sealing product were optimized from three aspects:compound formulation,surface treatment and material composite modification.The results showed that,when 4,4′-dithiodimorphine(DTDM)was used alone as the vulcanizing agent,the vulcanization time of the NBR compound was long and the compression set was large.When sulfur and vulcanizing agent DTDM were blended as the vulcanizing agent,with the increase of sulfur content,the vulcanization speed of the NBR compound increased,the crosslinking density were improved,and the compression set first decreased and then increased.The optimized formula of the NBR compound was as follows:NBR 100,zinc oxide 5,stearic acid 1,carbon black N33060,accelerator TBBS 1.5,vulcanizing agent DTDM 1.5,sulfur 0.5.On the other hand,spraying the anti-wear polyurethane coating on the surface of the NBR compound could not substantially reduce its friction coefficient,but spraying the anti-wear polyurethane coating on the surface of the NBR sealing product could reduce the risk of wear of the product at the initial stage of assembly.Moreover,the NBR compound composited with polyester cord or viscose fiber cord could improve its wear resistance.The friction coefficient of the polyester cord/NBR composite was lower,which was 44.04%lower than that of the viscose fiber/NBR composite,and 45.72%lower than that of the NBR compound without the anti-wear polyurethane coating.
作者
祝孝天
吕秀凤
张保生
郭春杰
ZHU Xiaotian;LYU Xiufeng;ZHANG Baosheng;GUO Chunjie(Zhuzhou Times New Material Technology Co.,Ltd,Zhuzhou 412007,China;BOGE Rubber&Plastics(Zhuzhou)Co.,Ltd,Zhuzhou 412007,China;Hunan Honghui Technology Co.,Ltd,Zhuzhou 412007,China)
出处
《橡胶工业》
CAS
2022年第9期697-703,共7页
China Rubber Industry
关键词
丁腈橡胶
耐磨密封制品
优化配方
表面处理
材料复合
交联密度
压缩永久变形
摩擦因数
NBR
wear resistant sealing product
optimized formulua
surface treatment
material composite
crosslinking density
compression set
friction coefficient
