芳纶纳米纤维对丁腈橡胶胶料性能的影响

Effect of Aramid Nanofibers on Properties of NBR Compound

以芳纶纳米纤维(ANFs)和丁腈胶乳为原料制备ANFs预分散体,将其加入到丁腈橡胶(NBR)中制备ANFs/NBR复合材料(NBR胶料),探究ANFs用量对NBR胶料性能的影响。结果表明:ANFs用量为4份时,NBR混炼胶的加工安全性能最好,NBR硫化胶的交联密度、100%定伸应力、300%定伸应力和撕裂强度最大,耐油性能最好,tanδ峰值最小;随着ANFs用量的增大,NBR混炼胶和硫化胶的Payne效应逐渐增强,在温度为20~100℃时NBR硫化胶的储能模量逐渐增大。

ANFs pre-dispersion was prepared with aramid nanofibers(ANFs)and nitrile latex as raw materials,and then added to nitrile butadiene rubber(NBR)to prepare ANFs/NBR composites(NBR compound).The effect of ANFs amount on the properties of NBR compound was investigated.The results showed that when the amount of ANFs was 4 phr,the processing safety property of the NBR compound was the best,the crosslinking density,tensile stress at 100%elongation,tensile stress at 300%elongation and tear strength of the NBR vulcanizate were the highest,the oil resistance was the best,and the peak value of tanδwas the smallest.With the increase of the amount of ANFs,the Payne effect of the NBR compound and vulcanizate was gradually enhanced,and the G′of the NBR vulcanizate in the temperature range of 20~100℃gradually increased.