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Rubber toughened recycled polyethylene terephthalate for material extrusion additive manufacturing
Polymer International ( IF 3.2 ) Pub Date : 2020-07-07 , DOI: 10.1002/pi.6079
Nicole E Zander 1 , Zachary R Boelter 1
Affiliation  

Plastic packaging materials represent a new class of low‐cost and sustainable additive manufacturing feedstocks. Recycled polyethylene terephthalate (PET) has been shown to be a robust material for material extrusion additive manufacturing, with mechanical properties comparable with acrylonitrile‐butadiene‐styrene. However, due to PET's high crystallinity, it is generally a brittle material and can be subject to premature fracture. It is well known that the addition of rubbers can serve to toughen PET. In this work, micronized rubber powder, as well as non‐reactive and functionalized styrene‐ethylene‐butadiene‐styrene (SEBS) elastomers were compounded with recycled PET. Tensile strength was not significantly affected, but toughness increased 85% with the addition of 5 wt% rubber, 350% with SEBS and over 550% with maleic anhydride functionalized SEBS compared to neat recycled PET. Fracture surface analysis revealed evidence of ductile fracture and cavitation in the rubber toughened samples. Published 2020. This article is a U.S. Government work and is in the public domain in the USA

中文翻译:

橡胶增韧再生聚对苯二甲酸乙二醇酯,用于材料挤出添加剂制造

塑料包装材料代表了新型的低成本和可持续的增材制造原料。再生聚对苯二甲酸乙二酯(PET)已被证明是用于材料挤出添加剂制造的坚固材料,其机械性能可与丙烯腈-丁二烯-苯乙烯媲美。但是,由于PET的高结晶度,它通常是脆性材料,可能会过早断裂。众所周知,橡胶的添加可以使PET增韧。在这项工作中,将微粉化的橡胶粉以及非反应性和功能化的苯乙烯-乙烯-丁二烯-苯乙烯(SEBS)弹性体与回收的PET混合在一起。拉伸强度没有受到显着影响,但是通过添加5 wt%的橡胶,韧性提高了85%,与纯净的回收PET相比,SEBS的含量为350%,马来酸酐官能化的SEBS含量为550%以上。断裂表面分析揭示了橡胶增韧样品中韧性断裂和空化的迹象。出版于2020年。本文是美国政府的工作,在美国属于公共领域
更新日期:2020-07-07
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