Permeability, Viscoelasticity, and Flammability Performances and Their Relationship to Polymer Nanocomposites

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• 作者：Ping鈥檃n Song ; Youming Yu ; Tao Zhang ; Shenyuan Fu ; Zhengping Fang ; Qiang Wu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：May 30, 2012
• 年：2012
• 卷：51
• 期：21
• 页码：7255-7263
• 全文大小：553K
• 年卷期：v.51,no.21(May 30, 2012)
• ISSN：1520-5045

文摘

Despite abundant studies on gas barrier, viscoelastic, and flammability properties of polymer nanocomposites, comprehensive understandings of these performances and their relationships are still lacking. We herein attempt to gain deep insights into the performances by creating several polymer nanocomposites by incorporating three types of nanoparticles, nanoclay (Clay), carbon nanotubes (CNTs), and reduced graphene nanoplates (RGO), into polypropylene (PP). The oxygen permeability, viscoelasticity, and flammability measurements demonstrate that RGO can lead to much more reduction in the gas permeability (by 73%) and flammability (peak heat release rate (PHRR) reduction by 78%), as well as a higher storage modulus and melt viscosity of polymer matrix relative to clay and CNTs at the same loading (1.0 wt %) due to its higher aspect ratio. Clay performs better than CNTs in terms of gas barrier property due to its lamellar structure while behaves worse than CNTs in terms of increasing the melt viscosity and reducing flammability of polymers. Most important, there is a nearly line correlation among these properties for all polymer nanocomposites despite some deviations.