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Novel Structure to Improve Mechanical Properties of Polymer Blends: Multilayered Ribbons
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-10-30 , DOI: 10.1021/acs.iecr.0c04448 Shuai Liu 1 , Chunhai Li 1 , Hong Wu 1 , Shaoyun Guo 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-10-30 , DOI: 10.1021/acs.iecr.0c04448 Shuai Liu 1 , Chunhai Li 1 , Hong Wu 1 , Shaoyun Guo 1
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Ribbon-like dispersed phase in polymer blends can provide excellent mechanical properties for the matrix, compared with the fibrillar or spherical dispersed phase. However, it is difficult to control the uniformity of size in the current preparation methods. In this work, polyethylene (PE)/PA11 alternating multilayered pellets were first obtained via multilayered coextrusion technology, and further novel multilayered ribbons with PA11 layers intercalated by PE layers were successfully constructed via secondary processing of the pellets. The morphology analysis showed that the formation of the novel multilayered ribbons was highly dependent on the thickness of the PA11 layer in the pellets, the adhesive strength of the layer interface, and the secondary processing temperature. When the PA11 layer thickness decreased to submicron, and the adhesive strength of the layer interface reached a certain level while the secondary processing temperature dropped to a certain degree, the multilayered ribbons with a uniform size could be obtained. The crystallinity of the PA11 layer in the multilayered ribbons could be increased by decreasing the secondary processing temperature. The yield strength and notch impact strength of the (PE/PEgMAH-50%)/PA11 blends with PA11/(PE/PEgMAH-50%) multilayered ribbons were 40 and 134% higher than those of the traditional pellet blends and were 64 and 26% higher than those of the corresponding matrix, respectively. This work provides a novel structure of a ribbon-like dispersed phase to improve the mechanical properties of polymer blends.
中文翻译：
改善聚合物共混物机械性能的新型结构：多层带
与纤维状或球形分散相相比，聚合物共混物中的带状分散相可为基质提供出色的机械性能。然而，在当前的制备方法中难以控制尺寸的均匀性。在这项工作中，首先通过多层共挤出技术获得了聚乙烯（PE）/ PA11交替多层颗粒，然后通过颗粒的二次加工成功地构建了新的多层带，其中PA11层插入了PE层。形态分析表明，新型多层带的形成高度依赖于粒料中PA11层的厚度，层界面的粘合强度以及二次加工温度。当PA11层的厚度减小到亚微米时，在二次加工温度下降到一定程度的同时，层界面的粘接强度达到一定水平，可以得到尺寸均匀的多层带。可以通过降低二次加工温度来提高多层带中PA11层的结晶度。带有PA11 /（PE / PEgMAH-50％）多层带的（PE / PEgMAH-50％）/ PA11共混物的屈服强度和缺口冲击强度分别比传统粒料共混物高40和134％，分别为64和分别比相应矩阵高26％。这项工作提供了一种带状分散相的新型结构，以改善聚合物共混物的机械性能。
更新日期：2020-11-12
中文翻译：
改善聚合物共混物机械性能的新型结构：多层带
与纤维状或球形分散相相比，聚合物共混物中的带状分散相可为基质提供出色的机械性能。然而，在当前的制备方法中难以控制尺寸的均匀性。在这项工作中，首先通过多层共挤出技术获得了聚乙烯（PE）/ PA11交替多层颗粒，然后通过颗粒的二次加工成功地构建了新的多层带，其中PA11层插入了PE层。形态分析表明，新型多层带的形成高度依赖于粒料中PA11层的厚度，层界面的粘合强度以及二次加工温度。当PA11层的厚度减小到亚微米时，在二次加工温度下降到一定程度的同时，层界面的粘接强度达到一定水平，可以得到尺寸均匀的多层带。可以通过降低二次加工温度来提高多层带中PA11层的结晶度。带有PA11 /（PE / PEgMAH-50％）多层带的（PE / PEgMAH-50％）/ PA11共混物的屈服强度和缺口冲击强度分别比传统粒料共混物高40和134％，分别为64和分别比相应矩阵高26％。这项工作提供了一种带状分散相的新型结构，以改善聚合物共混物的机械性能。
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