中国塑料 ›› 2014, Vol. 28 ›› Issue (03): 46-53 .DOI: 10.19491/j.issn.1001-9278.2014.03.010

• 材料与性能 • 上一篇    下一篇

PE-LLD/玻璃微珠复合材料的熔融与非等温结晶行为研究

曹新鑫 罗四海 王优 王李波 何小芳   

  1. 河南理工大学材料科学与工程学院;河北大学化学与环境工程学院 河南理工大学材料学院 河南理工大学 河南理工大学材料学院 河南理工大学材料科学与工程学院
  • 收稿日期:2013-08-16 修回日期:2013-12-06 出版日期:2014-03-15 发布日期:2014-03-15

Study on the Behavior of Melting and Non-Isothermal Crystallization of PE-LLD/GB Composites

  

  • Received:2013-08-16 Revised:2013-12-06 Online:2014-03-15 Published:2014-03-15

摘要: 采用X射线衍射法、偏光显微镜和差示扫描量热法考察了玻璃微珠(GB)对线形低密度聚乙烯(PE-LLD)的结晶形态以及非等温结晶与熔融行为的影响。通过Jeziorny法和莫志深法研究了复合材料的非等温结晶动力学,并利用Kissinger方程计算了PE-LLD/GB复合材料的非等温结晶活化能。结果表明,GB的加入细化了PE-LLD的晶粒,降低了晶粒尺寸和晶体完善程度;当GB含量为5 %(质量分数,下同)时,复合材料的结晶结构完善程度的分散性最大;GB起到了异相成核作用,提高了PE-LLD的结晶起始温度,当GB含量为8 %时,复合材料的结晶速率达到最大值;当GB含量低于5 %时,复合材料结晶活化能高于纯PE-LLD。

关键词: 线形低密度聚乙烯, 玻璃微珠, 熔融行为, 非等温结晶

Abstract: Crystal morphology, melting and non-isothermal crystallization behavior of linear low density polyethylene/glass bead (PE-LLD/GB) composites were investigated by X-ray diffraction, polarization microscope, and differential scanning calorimeter. Jeziorny and Mo methods were applied to analyze the non-isothermal crystallization kinetics of PE-LLD and PE-LLD/GB composites and the activation energy (ΔE) was estimated based on Kissinger method. Upon addition of GB, the size and crystallites was decreased. GB acted as a nucleating agent for the non-isothermal crystallization of PE-LLD, and increased the crystallization onset temperature (To). At a GB content of 8 wt %, the crystallization rate reached the highest value. In addition, the presence of GB increased the crystallization activation energy when the GB content was below 5 wt %.

Key words: linear low density polyethylene, glass bead, melting behavior, non-isothermal crystallization