Non-isothermal crystallization kinetics of polyethylene�?�clay nanocomposites prepared by high-energy ball milling

Bulletin of materials science

Maryam Abareshi¹  Seyed Mojtaba Zebarjad³  Elaheh K Goharshadi² 

[1] Chemistry Department, Payame Noor University, 19395-3697 Tehran, Iran$$Chemistry Department, Payame Noor University, 19395-3697 Tehran, IranChemistry Department, Payame Noor University, 19395-3697 Tehran, Iran$$;Center of Nano Research, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran$$Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran$$Center of Nano Research, Ferdowsi University of Mashhad, Mashhad 91775-1436, IranCenter of Nano Research, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran$$Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran$$Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad 91775-1436, IranCenter of Nano Research, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran$$Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran$$;Department of Materials Science and Engineering, Engineering Faculty, Shiraz University, Shiraz, Iran$$Department of Materials Science and Engineering, Engineering Faculty, Shiraz University, Shiraz, IranDepartment of Materials Science and Engineering, Engineering Faculty, Shiraz University, Shiraz, Iran$$

关键词: Differential scanning calorimeter;    non-isothermal crystallization kinetics;    nanocomposites;    polymer.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Non-isothermal crystallization kinetics of pure medium density polyethylene (MDPE) and MDPE�?�clay nanocomposites have been investigated by differential scanning calorimeter. The modified Avrami, Ozawa, Liu and Ziabicki equations have been applied to describe non-isothermal crystallization process. The results of Avrami analysis showed a very complicated crystallization mechanism. Although, Ozawa equation failed to provide an adequate description for non-isothermal crystallization process, Liu equation could describe it well. The data showed the crystallization rate of MDPE and nanocomposites raises with increasing cooling rate and the crystallization rate of nanocomposite is faster than that of MDPE at a given cooling rate. Ziabicki’s kinetic crystallizability index showed that clay can increase the ability of MDPE to crystallize, when it is cooled at unit cooling rate. The activation energy of samples has been evaluated by Kissinger method. The results showed that the activation energy of nanocomposite was lower than that of MDPE.

【 授权许可】

Unknown