Engineering (Feb 2022)

Industrial-Scale Polypropylene–Polyethylene Physical Alloying Toward Recycling

  • Jinping Qu,
  • Zhaoxia Huang,
  • Zhitao Yang,
  • Guizhen Zhang,
  • Xiaochun Yin,
  • Yanhong Feng,
  • Hezhi He,
  • Gang Jin,
  • Ting Wu,
  • Guangjian He,
  • Xianwu Cao

Journal volume & issue
Vol. 9
pp. 95 – 100

Abstract

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Polypropylene (PP) and polyethylene (PE) play central roles in our daily life. However, their immiscibility presents a major hurdle in both industry and academia when recycling them into alloys with favorable mechanical properties. Moreover, typical compatibilizer-enabled approaches are limited due to increased environmental concerns. Herein, inspired by a traditional Chinese technique, we report a facile, industry-scale methodology that produces a PP/PE binary blend with a highly ordered honeycomb nanostructure without any additives. Due to its nanostructure, the blend exhibits enhanced tensile properties in comparison with the parent components or with a sample prepared using an internal mixer. This approach has potential for applications not only in immiscible polymer blending, but also in non-sorting, compatibilizer-free waste plastics recycling. Through this technique, we expect that an environmentally friendly and sustainable plastic wastes recycling avenue can be found, and great economic benefits can be gained.

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