动态硫化EPDM/PP共混物力学性能的研究

肖汉文　 黄世强　 李洪桥　 蒋涛　

摘　要：考察了硫黄用量和聚合物共混比对动态硫化EPDM/PP热塑性弹性体性能的影响。结果表明，随着硫黄用量增大，EPDM/PP共混物的拉伸强度、100％定伸应力和扯断伸长率先增大后减小，硬度有所增大；随着PP用量的增大，EPDM/PP共混物的拉伸强度、100％定伸应力和硬度均有所增大，扯断伸长率也是先增大后减小。PP用量的变化对这些性能的影响更显著。
关键词：EPDM；PP；热塑性弹性体；动态硫化
分类号：TQ334.9　文献标识码：A
文章编号：1000-890X(2000)03-0135-03

Study on mechanical properties of dynamically vulcanized EPDM/PP blends

XIAO Han-wen ,HUANG Shi-qiang ,LI Hong-qiao ,JIANG Tao
((Hubei University, Wuhan 430062))

Abstract：The influence of the sulfur level and the rubber/plastics ratio on the mechanical properties of dynamically vulcanized EPDM/PP thermoplastic elastomers was investigated. The results showed that the tensile strength, the modulus at 100% elongation, and the elongation at break of EPDM/PP blends increased at first and then decreased as the sulfur level increased; the tensile strength, the modulus at 100% elongation and the hardness of EPDM/PP blends increased, and their elongation at break increased at first and then decreased as the PP proportion increased; and the PP proportion had more significant effect on the mechanical properties of the blends.
Keywords：EPDM; PP; thermoplastic elastomer; dynamic vulcanization