Preparation,Structure and Mechanical Properties of PET/Kaolin Nanocomposites
PET/kaolin nanocomposites were prepared with melt blending and the structure of the composites was characterized through IR techniques.The results showed that there is stable chemical bonding between PET and kaolin.In addition,the dispersion condition of nanokaolin was observed by means of SEM and TEM.As a result,the thickness of the dispersed nanokaolin particles in PET matrix is mainly from 20mm to 200nm,and the nanosized particles congregate to some extent in the samples.In addition,it was found the kaolin particles almost homogeneously dispersed in the PET matrix,without preferential orientation because of the shear effect due to melt blending.Furthermore,the mechanical properties of PET/kaolin nanocomposites are dependent on the modification efficiency of nanokaolin.With the poor efficiency,the nanokaolin particles tend to aggregate at a high content and have a bad interfacial compability between nanokaolin and PET matrix,which lead to stress concentration,so the mechanical property descends.Experiments of different contents of modified nanokalin indicated that the intensity of PET/kaolin nanocomposites decreased firstly,then increased,and then decreased,with the nanokaolin content of 4 to 5 percent,the rupture stress of the composites showed a maximum value,which was higher than that of pure PET.On one hand,nanokaolin decreases the function among PET macromolecules,which will decline the mechanical properties,on the other hand,the piece structure of kaolinite improves the intensity of the nanocomposite.When the nanokaolin content is low,the former has the dominant effect on mechanical property,while the latter will play a leading role with the content increasing.But if the nanokaolin content still increases,the agglomeration and stress concentration will be obvious.
Kaolin Nanocomposites Preparation Structure Mechnical properties
Y.P.Lu Q.F.Liu
Institute of Material Science and Engineering,Henan Polytechnic University,Jiaozuo,China China University of Mining and Technology,Beijing,China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3395-3400
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）