Dynamic mechanical study of clay dispersion in maleated polypropylene/organoclay nanocomposites

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题名:	Dynamic mechanical study of clay dispersion in maleated polypropylene/organoclay nanocomposites
作者:	Wang, Y., Huang, S.-W., Guo, J.-Y.
贡献者:	Department of Chemical and Materials Engineering, Tunghai University
关键词:	Amorphous polymers;Chain confinement;Clay dispersion;Clay exfoliation;Clay loadings;Cooperative motion;Crystalline regions;Dynamic mechanical property;Dynamic mechanical study;Exfoliated nanocomposites;Halpin-Tsai theory;High aspect ratio;Higher temperatures;Maleic anhydride grafted polypropylene;Melt blending;Morphological characteristic;Storage moduli
日期:	2009
上传时间:	2013-05-21T09:06:54Z (UTC)
摘要:	Morphological characteristics and the dynamic mechanical properties of maleic anhydride grafted polypropylene (ppgma) and its clay-filled nanocomposites with different degrees of clay exfoliation have been investigated. fully and partially exfoliated samples were prepared through powered sonication and melt blending, respectively. our results indicated that both mechanical α and β relaxations can be identified. the glass (β) transition of the nanocomposites shifted to slightly lower temperatures for nearly all formulations because of reduced chain cooperative motion. however, the broad α transition became more distinct with increasing clay loading for sonicated nanocomposites, and shifted to higher temperatures due to chain confinement of amorphous polymer chains in the crystalline region. the reinforcement in the glassy storage modulus e' of ppgma was examined by the halpin- tsai theory. the high aspect ratio of clay stacks in the fully exfoliated nanocomposites resulted in a significant increase in reinforcing efficiency. ? 2008 Society of Plastics Engineers.
關聯:	Polymer Composites 30 (9) , pp. 1218-1225
显示于类别:	[化學系所] 期刊論文

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