高发泡倍率三元乙丙弹性体材料模压发泡研究  

Investigation of Mold Foaming of EPDM Elastomer with High Expansion Ratio

作　　者：廖华勇[1] 彭超[1] 李书齐 陶国良[1] 刘春林[1] Liao Huayong;Peng Chao;Li Shuqi;Tao Guoliang;Liu Chunlin(Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials,School of Materials Science and Engineering,Changzhou University,Changzhou 213164,China;Department of Mechanical and Electronic Engineering,Changzhou Vocational Institute of Engineering,Changzhou 213164,China)

机构地区：[1]江苏省环境友好高分子材料重点实验室,材料科学与工程学院,常州大学,江苏常州213164 [2]机械与电子工程学院,常州工程职业技术学院,江苏常州213164

出　　处：《工程塑料应用》2018年第10期57-62,共6页Engineering Plastics Application

摘　　要：用模压发泡法制备了三元乙丙弹性体(EPDM)发泡材料,研究了AC发泡剂用量、氧化锌(ZnO)用量、过氧化二异丙苯(DCP)用量以及发泡温度、发泡压力、发泡时间等工艺参数对EPDM泡沫表观密度和力学性能等的影响。结果表明:随着AC发泡剂用量的增加,EPDM泡沫的力学性能和泡沫表观密度缓慢下降。随着DCP用量的增加,泡沫的拉伸强度和撕裂强度逐渐增大。DCP用量为0.5份时发泡倍率达到最大,为8.2。ZnO用量对泡沫力学性能影响不大。发泡温度为170℃时泡沫表观密度达到最小。随着发泡压力逐步升高,泡沫表观表观密度缓慢上升。发泡压力为0.5MPa和5MPa时发泡倍率超过8。发泡时间为12 min时表观密度最低,为0.124 g/cm3,发泡倍率达到最大8.2。扫描电子显微镜观察显示,EPDM泡沫多为闭孔结构。The ethylene propylene diene monomer(EPDM)foam was prepared by molding method.The influence various factors such as AC foaming agent,zinc oxide(ZnO),dicumyl peroxide(DCP),foaming temperature,pressure and time on density and mechanical properties of EPDM foam were investigated.The results show that mechanical properties and density of EPDM foam decrease gradually as the increase of AC foaming agent.As DCP content increases,tensile strength and tear strength of EPDM foam increase gradually.The expansion ratio reaches the maximum,which is 8.2 when DCP content is 0.5 phr.The experiments show content of ZnO has little effect on mechanical properties of EPDM foam.The density of EPDM foam reaches the minimum when the temperature is 170℃.The density of EPDM foam increases gradually when foaming pressure increases.The expansion ration of the EPDM foam exceeds 8 when pressure is 0.5 and 5 MPa respectively.The density of EPDM foam has lowest value when foaming time is 12 min,which is 0.124 g/cm3,and the expansion ratio arrives the highest value 8.2.Scanning electron microscope shows the EPDM foam mainly has a structure with closed cells.

关 键 词：三元乙丙弹性体 发泡 表观密度 拉伸强度 撕裂强度 发泡倍率 

分 类 号：TQ325[化学工程—合成树脂塑料工业]