纳米金刚石改性LLDPE的非等温结晶动力学

采用X射线衍射（XRD）、偏光显微镜（POM）以及差示扫描量热（DSC）法,考察了纳米金刚石（Nano-diamond）对线型低密度聚乙烯（LLDPE）的结晶形态以及非等温结晶行为的影响。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LLDPE/Nano-diamond复合材料的非等温结晶活化能。结果表明：Nano-diamond是一种有效的成核剂,为LLDPE结晶提供了更多的活化晶核,起到了异相成核的作用,既提高了LLDPE的结晶起始温度To、结晶峰值温度Tp和结晶速率，又降低了球晶的尺寸，使得球晶的分布更为均匀致密；添加Nano-dia...

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Bibliographic Details
Published in航空材料学报 Vol. 34; no. 5; pp. 55 - 62
Main Author 曹新鑫 罗四海 王优 何小芳
Format Journal Article
LanguageChinese
Published 河南理工大学材料科学与工程学院,河南焦作,454000 2014
Subjects
复合材料
成核剂
纳米金刚石
线型低密度聚乙烯
非等温结晶
非等温结晶
composites
nucleating agent
纳米金刚石
Nano-diamond
成核剂
复合材料
linear low density polyethylene
线型低密度聚乙烯
non-isothermal crystallization
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ISSN1005-5053
DOI10.11868/j.issn.1005-5053.2014.5.009

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Summary:采用X射线衍射（XRD）、偏光显微镜（POM）以及差示扫描量热（DSC）法,考察了纳米金刚石（Nano-diamond）对线型低密度聚乙烯（LLDPE）的结晶形态以及非等温结晶行为的影响。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LLDPE/Nano-diamond复合材料的非等温结晶活化能。结果表明：Nano-diamond是一种有效的成核剂,为LLDPE结晶提供了更多的活化晶核,起到了异相成核的作用,既提高了LLDPE的结晶起始温度To、结晶峰值温度Tp和结晶速率，又降低了球晶的尺寸，使得球晶的分布更为均匀致密；添加Nano-diamond使得复合材料的结晶迁移活化能降低，当Nano-diamond含量为1％时，复合材料结晶活化能达到最小值。
Bibliography:CAO Xin-xin, LUO Si-hai, WANG You, HE Xiao-fang （ School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan China）
linear low density polyethylene; Nano-diamond ; non-isothermal crystallization ; nucleating agent; composites
11-3159/V
Effeets of Nano-diamond composites on the crystal morphology and non-isothermal crystallization of linear low density polyethylene （LLLDPE） were investigated by XRD, polarization microscope（POM） and differential scanning calorimetry（DSC）. The Jeziorny and Mo methods were applied to the analysis of the non-isothermal crystallization kinetics of LLDPE and LLDPE/ Nano-diamond composites, and the activation energy （AE） based on Kissinger method was evaluated. The results show that Nano-diamond is an ef- fective nucleating agent, provides more activated nuclei for the crystallization of LLDPE, plays a role in heterogeneous nucleation, and enhances crystallization onset temperature（ To ） , crystallization peak temperature（ Tp ） and crystallization r
ISSN:1005-5053
DOI:10.11868/j.issn.1005-5053.2014.5.009