【作者】 陈思； 唐国栋； 徐建明； 严井凯； 王旭；

【Author】 CHEN Si,TANG Guo-dong,XU Jian-ming,YAN Jing-kai,WANG Xu (College of Chemical Engineering and Materials Science,Zhejiang University of Technology,Hangzhou 310014,China)

【机构】 浙江工业大学化学工程与材料学院；

【摘要】 利用转矩流变仪研究了过氧化二异丙苯(DCP)含量对低密度聚乙烯(LDPE)交联的影响。结果表明,DCP含量的增加可以提高LDPE交联的程度。温度的升高可以缩短交联的起始时间,135℃时400s开始交联,145℃时200s开始交联。在发泡剂偶氮二甲酰胺(AC)含量相同的情况下,LDPE的发泡倍率随着DCP含量的增加先增大后减小。AC含量为1phr时,0.4phr DCP可使LDPE的发泡倍率达到10倍。利用视频显微镜观察LDPE发泡材料的泡孔形态。结果发现,添加0.2～0.6phr DCP可得到直径较小、分布均匀的泡孔。AC含量的增加可提高LDPE的发泡倍率,降低制品的密度。更多还原

【Abstract】 The effect of DCP content on the crosslink of LDPE was studied via torque rheometer.The results showed that the increasing of DCP content can improve the crosslink degree of LDPE.The raise of temperature could shorten the starting time of crosslink of LDPE which began to crosslink at 400s in 135℃whereas 200s in 145℃.The blowing multiple of LDPE first increased then decreased with the increasing of DCP content when the addition of AC blowing agent was constant.Adding 0.4phr DCP could make LDPE foam reach 10 times expansion when AC content was 1phr.The shape of air pores of LDPE foam was observed by video microscopy.It was found that adding 0.2-0.6phr DCP can get small diameter and homogeneous distribution air pores.The increasing of AC content could improve the blowing multiple of LDPE foam and decreased its density.更多还原