混炼工艺对丁腈橡胶性能的影响

研究混炼工艺对丁腈橡胶性能的影响。结果表明：降低混炼初始温度，混炼能耗增大，混炼胶加工安全性提高；增大填充因数，混炼温度升高，混炼胶加工安全性降低，但生产单位质量混炼胶的能耗减小；缩短混炼时间，混炼胶门尼粘度显著增大，门尼松弛时间延长，填料分散性变差，混炼胶焦烧时间缩短，加工性能差；当填充因数为0.7时，填料分散均匀，混炼效果较好，混炼胶门尼粘度较小；低温混炼工艺有利于提高硫化胶拉断伸长率，混炼工艺对硫化胶硬度、拉伸强度、回弹值和压缩永久变形影响不明显。;The effect of mixing process on the properties of acrylonitrile-butadiene rubber（NBR） was studied.The results showed that，reducing the initial mixing temperature，the mixing energy consumption increased，and the processing safety of mixing compound was improved.With the increase of the filling coefficient，the mixing temperature increased，the processing safety of mixing compound was reduced，but the energy consumption for producing unit mass mixing compound decreased.Shortening the mixing time，the Mooney viscosity of mixing compound increased significantly，the Mooney relaxation time was prolonged，dispersion of the filler was weakened，the scorch time of mixing compound was shortened，the processing performance was poor.When the filling coefficient was 0.7，the fillers were evenly dispersed，the mixing effect was better，mixing compound had lower Mooney viscosity.Low temperature mixing process had benefit for improving the elongation at break of vulcanizates，and the mixing process had no obvious influence on the hardness，tensile strength，resilience and compression set of vulcanizates