Effects of halloysite nanotubes on kinetics and activation energy of non-isothermal crystallization of polypropylene |
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Authors: | Mingliang Du Baochun Guo Jingjing Wan Quliang Zou Demin Jia |
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Affiliation: | (1) Faculty of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, 310018, China;(2) Department of Polymer Materials and Engineering, South China University of Technology, Guangzhou, 510640, China; |
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Abstract: | Halloysite nanotubes (HNTs), a kind of naturally occurring silicates possessing typical fibular structure, were introduced
to fabricate polypropylene (PP)/HNTs nanocomposites. The non-isothermal crystallization behaviors were investigated by differential
scanning calorimetry (DSC) method according to different treatments. The results suggest, with the inclusion of HNTs in PP
matrix, the nanocomposites crystallize at higher temperature regime, which are correlated with the heterogeneous nucleating
effects of HNTs during the crystallization process of PP. The kinetics studies of crystallization show that PP nanocomposites
possess faster crystallization process and higher activation energy due to the nucleating effect and hindrance effect of HNTs
to the motion of PP chains. The polarized light microscopy (PLM) observations further show that HNTs serve as nucleation sites
and accelerate the crystallization process. |
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Keywords: | |
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