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

被引：10
作者：
Abareshi, Maryam [1 ]
Zebarjad, Seyed Mojtaba [2 ]
Goharshadi, Elaheh K. [3 ,4 ]
机构：
[1] Payame Noor Univ, Dept Chem, Tehran 193953697, Iran
[2] Shiraz Univ, Fac Engn, Dept Mat Sci & Engn, Shiraz, Iran
[3] Ferdowsi Univ Mashhad, Ctr Nano Res, Mashhad 917751436, Iran
[4] Ferdowsi Univ Mashhad, Dept Chem, Fac Sci, Mashhad 917751436, Iran
来源：
BULLETIN OF MATERIALS SCIENCE | 2014年 / 37卷 / 05期
关键词：
Differential scanning calorimeter; non-isothermal crystallization kinetics; nanocomposites; polymer; MELT-CRYSTALLIZATION; BEHAVIOR; POLYPROPYLENE; NUCLEATION; KETONE);
D O I：
10.1007/s12034-014-0051-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
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.
引用
收藏
页码：1113 / 1121
页数：9
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