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首页> 外文期刊>Journal of Applied Polymer Science >Blend of high-density polyethylene and a linear low-density polyethylene with compositional-invariant mechanical properties
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Blend of high-density polyethylene and a linear low-density polyethylene with compositional-invariant mechanical properties

机译：高密度聚乙烯和线性低密度聚乙烯的混合物，具有不变的机械性能

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This article presents the tensile properties and morphological characteristics of binary blends of the high-density polyethylene (HDPE) and a linear low-density polyethylene (LLDPE). Two constituents were melt blended in a single-screw extruder. Injection-molded specimens were evaluated for their mechanical properties by employing a Universal tensile tester and the morphological characteristics evaluated by using a differential scanning calorimeter and X-ray diffractometer. It is interesting to observe that the mechanical properties remained invariant in the 10-90% LLDPE content. More specifically, the yield and breaking stresses of these blends are around 80% of the corresponding values of HDPE. The yield elongation and elongation-at-break are around 65% to corresponding values of HDPE and the modulus is 50% away. Furthermore, the melting endotherms and the crystallization exotherms of these blends are singlet in nature. They cluster around the corresponding thermal traces of HDPE. This singlet characteristic in thermal traces entails cocrystallization between these two constituting components. The clustering of thermal traces of blends near HDPE meant HDPE-type of crystallites were formed. Being nearly similar crystallites of blends to that of HDPE indicates nearness in mechanical properties are observed. The X-ray diffraction data also corroborate these observations. (C) 2002 John Wiley Sons, Inc. [References: 10]
机译：本文介绍了高密度聚乙烯（HDPE）和线性低密度聚乙烯（LLDPE）的二元共混物的拉伸性能和形态特征。在单螺杆挤出机中将两种成分熔融共混。使用万能拉伸测试仪评估注塑成型的样品的机械性能，并使用差示扫描量热仪和X射线衍射仪评估其形态特征。有趣的是，机械性能在10-90％LLDPE含量中保持不变。更具体地说，这些共混物的屈服应力和断裂应力约为HDPE相应值的80％。屈服伸长率和断裂伸长率约为相应的HDPE值的65％，模量相距50％。此外，这些共混物的熔融吸热和结晶放热本质上是单峰的。它们聚集在相应的HDPE热迹线上。热痕迹中的这种单重态特征导致这两个组成成分之间发生共结晶。 HDPE附近混合物的热痕迹聚集意味着形成了HDPE型微晶。共混物的微晶与HDPE的微晶几乎相似，表明观察到机械性能接近。 X射线衍射数据也证实了这些观察结果。 （C）2002 John Wiley Sons，Inc. [参考：10]

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