PE-LLD/纳米Al_2O_3复合材料非等温结晶动力学研究  

Study on Non-isothermal Crystallization Kinetics of PE-LLD/Nano-Al_2O_3 Composites

作　　者：何小芳[1] 张崇[1] 王李波[1] 戴亚辉[1] 曹新鑫[1] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454000

出　　处：《中国塑料》2012年第12期40-44,共5页China Plastics

摘　　要：采用差示扫描量热法研究了线形低密度聚乙烯(PE-LLD)/纳米氧化铝(Al2O3)复合材料的非等温结晶行为,分别利用Avrami方程和莫志深方程对结晶动力学进行了分析,运用Kissinger方程计算了结晶过程中的活化能。结果表明,添加5%(质量分数,下同)和10%的纳米Al2O3,在PE-LLD的非等温结晶过程中起到的异相成核作用较为微弱,PE-LLD/纳米Al2O3复合材料的结晶起始温度、峰值温度和结晶速率均较PE-LLD略有提高,但结晶活化能有所降低。Non-isothermal crystallization behavior of linear low density polyethylene （PE-LLD）/ nano-Al2O3 composites was investigated using differential scanning calorimetry. The nonisothermal crystallization kinetics was analyzed with Avrami and Mo methods. Kissinger method was used to estimate the activation energy for non-isothermal crystallization. When the content of nano-Al2O3 was between 5 % and 10 %, the heterogeneous nucleation in the crystallization process of PE-LLD was sufficient, the crystallization onset temperature, peak temperature, and crystallization rate increased only slightly. The addition of nano-Al2 O3 decreased the activation energy of PE-LLD.

关 键 词：线形低密度聚乙烯 纳米氧化铝 复合材料 非等温结晶动力学 

分 类 号：TB383.1[一般工业技术—材料科学与工程]