橡塑比对EPDM/PA6热塑性动态硫化橡胶的性能影响研究  

Research on the effect of rubber-plastic ratio on the properties of EPDM/PA6 thermoplastic dynamic vulcanized rubber

作　　者：邓权桉 马翊 王选伦[1] Deng Quan'an;Ma Yi;Wang Xuanlun(College of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆理工大学材料科学与工程学院,重庆400054

出　　处：《橡塑技术与装备》2024年第4期14-17,共4页China Rubber/Plastics Technology and Equipment

摘　　要：采用动态硫化法挤出成型制备共混型三元乙丙橡胶(EPDM)/尼龙6(PA6)热塑性动态硫化橡胶(TPV),对不同比例的EPDM/PA6共混物进行了研究。结果表明:脆断微观形貌分析,四组橡塑比均形成了“海岛”结构,其中橡塑比为70/30的橡胶微粒尺寸和分散状态更均匀。加工流变性分析,橡塑比为70/30的扭矩有最小值;随橡塑比的增大,拉伸强度和断裂伸长率先上升后下降,分别在EPDM/PA6为60/40和70/30时达到最大值。从降低成本考虑,选用橡塑比为70/30的为宜。Blended EPDM/PA6 thermoplastic dynamic vulcanized rubber(TPV)was prepared by dynamic vulcanization extrusion molding,and different proportions of EPDM/PA6 blends were studied.The analysis of brittle fracture microstructure shows that all four rubber-plastic ratios form an"island"structure,with rubber particles with a rubber-plastic ratio of 70/30 having a more uniform size and dispersion state.The analysis of processing rheology shows that the torque with a rubber plastic ratio of 70/30 has a minimum value;As the rubber-plastic ratio increases,the tensile strength and fracture elongation first increase and then decrease,reaching their maximum values at EPDM/PA6 ratios of 60/40 and 70/30,respectively.From a cost perspective,it is advisable to choose a rubber-plastic ratio of 70/30.

关 键 词：动态硫化 橡塑比 挤出成型 热塑性硫化橡胶 

分 类 号：TQ330.67[化学工程—橡胶工业]