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首页> 外文期刊>Polymer Composites >Thermal Stability and Dynamic Mechanical Behavior of Exfoliated Graphite Nanoplatelets-LLDPE Nanocomposites
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Thermal Stability and Dynamic Mechanical Behavior of Exfoliated Graphite Nanoplatelets-LLDPE Nanocomposites

机译：片状石墨纳米片-LLDPE纳米复合材料的热稳定性和动态力学行为

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摘要

The objective of this research was to investigate thermal stability and dynamic mechanical behavior of Exfoliated graphite nanoplatelets (xGnP~(TM))-Linear Low-Density Poly Ethylene (LLDPE) nanocomposites with different xGnP loading content. The xGnP-LLDPE nanocomposites were fabricated by solution and melt mixing in various screw rotating systems such as co-, counter-, and modified-corotating. The storage modulus (E') of the composites at the starting point of -50°C increased as xGnP contents increased. E' of the nanocomposite with only 7 wt% of xGnP was 2.5 times higher than that of the control LLDPE. Thermal expansion and the coefficient of thermal expansion of xGnP-loaded composites were much lower than those of the control LLDPE in the range of 45-80℃ (299.8 x 10~(-6)/ °C) and 85-100°C (365.3 x 10~(-6)/°C). Thermal stability of the composites was also affected by xGnP dispersion in LLDPE matrix. The xGnP-LLDPE nanocomposites by counter-rotating screw system showed higher thermal stability than ones by co-rotating and modified-corotating system at 5 wt% and 12 wt% of xGnP. xGnP had a great effect on high thermal stability of xGnP-LLDPE composites to be applied as tube and film for electrical materials.
机译：这项研究的目的是研究具有不同xGnP含量的片状石墨纳米薄片（xGnP〜（TM））-线性低密度聚乙烯（LLDPE）纳米复合材料的热稳定性和动态力学行为。 xGnP-LLDPE纳米复合材料是通过在各种螺旋旋转系统（例如同向旋转，反向旋转和改性同向旋转）中进行固溶和熔融混合制成的。随着xGnP含量的增加，复合材料在-50°C起始点的储能模量（E'）增加。仅含有7 wt％xGnP的纳米复合材料的E'比对照LLDPE的E'高2.5倍。在45-80℃（299.8 x 10〜（-6）/°C）和85-100°C（-）的温度范围内，xGnP负载复合材料的热膨胀系数和热膨胀系数远低于对照LLDPE。 365.3 x 10〜（-6）/°C）。 xGnP在LLDPE基质中的分散性也影响了复合材料的热稳定性。通过反向旋转螺杆系统制备的xGnP-LLDPE纳米复合材料比xGnP的5 wt％和12 wt％的通过同向旋转和改性同向旋转体系的复合材料显示出更高的热稳定性。 xGnP对用作电子材料的管和膜的xGnP-LLDPE复合材料的高热稳定性有很大影响。

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