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首页> 外文期刊>Journal of Applied Polymer Science >Morphology and toughness enhancements in recycled high-density polyethylene (rHDPE) via solid-state shear pulverization (SSSP) and solid-state/melt extrusion (SSME)
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Morphology and toughness enhancements in recycled high-density polyethylene (rHDPE) via solid-state shear pulverization (SSSP) and solid-state/melt extrusion (SSME)

机译：通过固态剪切粉碎（SSSP）和固态/熔体挤出（SSME）来提高再生高密度聚乙烯（rHDPE）的形貌和韧性

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摘要

Solid-state, mechanochemical polymer processing techniques are explored as an effective and sustainable solution to appearance and performance issues commonly associated with recycled plastic products. Post-consumer high-density polyethylene (HDPE) from milk jugs is processed via conventional twin screw extrusion (TSE), solid-state shear pulverization (SSSP), and solid-state/melt extrusion (SSME), and compared to the as-received and virgin forms regarding output attributes and mechanical properties, as well as morphology. Solid-state processing methods, particularly SSME with a harsh screw configuration, produce samples with consistent appearance and melt flow characteristics. Tensile ductility/toughness and impact toughness are enhanced by up to 11-fold as compared to the as-received sample, to a level near and above those of an equivalent virgin HDPE. Calorimetry, optical microscopy, X-ray scattering, and rheology characterization reveal that the mechanical improvements result from a favorable combination of physical and molecular changes in rHDPE, such as impurity size reduction, spherulite size enlargement, and chain branching. (C) 2015 Wiley Periodicals, Inc.
机译：固态，机械化学聚合物加工技术被探索为一种有效且可持续的解决方案，用于解决通常与再生塑料产品相关的外观和性能问题。通过常规的双螺杆挤出（TSE），固态剪切粉碎（SSSP）和固态/熔体挤出（SSME）对牛奶罐中的消费后高密度聚乙烯（HDPE）进行处理，并将其与以下情况进行比较：有关输出属性，机械性能以及形态的原始和原始形式。固态处理方法，尤其是具有苛刻螺杆配置的SSME，可产生具有一致外观和熔体流动特性的样品。与原样相比，拉伸延展性/韧性和冲击韧性提高了11倍，达到了接近或高于同等原始HDPE的水平。量热法，光学显微镜，X射线散射和流变学表征表明，机械改进是由于rHDPE的物理和分子变化（如杂质尺寸减小，球晶尺寸增大和链支化）的良好组合而产生的。 （C）2015年Wiley Periodicals，Inc.

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