Elucidating pathways of polypropylene chain cleavage and stabilization for multiple loop mechanical recycling

Bernhard von Vacano; Oliver Reich; Gregor HuberGazi Türkoglu

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Elucidating pathways of polypropylene chain cleavage and stabilization for multiple loop mechanical recycling

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摘要

Mechanical recycling is a decisive contribution for a sustainable circular economy of polypropylene (PP) but faces the challenge of processing-induced and use-phase accumulated molecular damage, exacerbated by multiple loop recycling. In this contribution, the molecular origin of degradation of PP under up to 30 repetitive reprocessing loops is analyzed together with the influence of stabilization, and processability data linked to changes of the entire molecular weight distribution. By comparison of experiments with simple Monte Carlo simulations, a coupled mechanism of random scission and shear-induced cleavage can be inferred, while stabilizing additives effectively protect the material from progressing along this combined degradation pathway.

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来源
《Journal of Polymer Science》 |2023年第16期|1849-1858|共10页
作者
Bernhard von Vacano; Oliver Reich; Gregor HuberGazi Türkoglu;
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作者单位

BASF SE, Group Research, Ludwigshafen, Germany;

BASF SE, Global Competence Center Packaging & Consumer Goods, Plastic Additives, Ludwigshafen, Germany;

BASF Corporation, Industry Segment Building & Construction, Plastic Additives, Tarrytown, New York, USA;

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原文格式 PDF
正文语种英语
中图分类有机化学;高分子化学（高聚物）;
关键词
additives; circular economy; degradation; mechanism; polypropylene; recycling; stabilization;

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Elucidating pathways of polypropylene chain cleavage and stabilization for multiple loop mechanical recycling

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