过氧化物DCP与硫黄交联丁苯橡胶体系的拉伸取向行为对比研究

Comparative Study on Tensile Orientation Behavior of Peroxide DCP Cross-linked and Sulfur Cross-linked SBR System

利用傅里叶转换红外光谱仪,通过红外二色法测定过氧化物DCP交联丁苯橡胶(SBR)体系(DCP/SBR硫化胶)与硫黄交联SBR体系(S/SBR硫化胶)在不同拉伸应变下的取向度,并对两种体系的拉伸取向行为进行对比。结果表明:DCP/SBR和S/SBR硫化胶在拉伸过程中的取向度均随应变的增大而增大;在交联密度相近的情况下,S/SBR硫化胶更容易发生拉伸取向行为,其取向度远大于DCP/SBR硫化胶。通过Mooney-Rivlin模型拟合佐证了红外二色法分析结果的正确性。

The orientation degree of peroxide DCP cross-linked SBR system(DCP/SBR vulcanizate) and sulfur cross-linked SBR system(S/SBR vulcanizate )under different tensile strain was determined by infrared dichroism method using Fourier transform infrared spectrometer,and the tensile orientation behavior of the two systems was compared. The results showed that,the orientation degree of the DCP/SBR vulcanizate and S/SBR vulcanizate increased as the strain increased during the stretching process. In the case of similar crosslink density,the S/SBR vulcanizate was more prone to tensile orientation,and the orientation degree was much larger than that of the DCP/SBR vulcanizate. The results of the infrared dichroism method were confirmed by the Mooney-Rivlin model fitting.