Recycling polypropylene waste packaging. Technical requirements for radiation processing

IF 3.5 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry Pub Date : 2026-06-01 Epub Date: 2026-02-11 DOI:10.1016/j.radphyschem.2026.113711

Julio Harada , Juliana Arquinto , Maria da Conceição Costa Pereira , Maria Elizabeth Maués dos Santos , Dione Pereira de Castro , Traian Zaharescu , Leonardo Gondim de Andrade e Silva

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Abstract

This study addresses the use of radiation processing in the reuse of polypropylene (PP) waste derived from municipal products (MSW), evaluating its physical and chemical properties after e-beam (EB) irradiation in a wide range of doses between 12.5 and 500 kGy. The results show that EB irradiation up to 50 kGy has proven more efficient than conventional recycling methods, promoting molecular modifications and achieving convenient molecular rearrangements. Chemical and thermal analyses show the irradiation interference in PP after 25 kGy, and the melting temperature decreased when irradiated with a dose of up to 250 kGy, impacting the morphological and crystallinity phases, due to molecular cross-linking, especially in the PPrec samples. It was observed that the Vicat tests did not interfere with PPrec recycling, for secondary applications. The doses exceeding 100 kGy up to 500 kGy crosslinking allow PP to be a proper material as fillers, industrial applications, or utilized as an energy source, enhancing environmental sustainability. The use of EB in polymer processing presents a significant advantage as an alternative energy source, positioning it as a more sustainable and eco-friendly approach compared to traditional plastic recycling methods.

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回收废旧聚丙烯包装。辐射加工技术要求

本研究探讨了辐射处理在城市产品（MSW）产生的聚丙烯（PP）废物再利用中的应用，评估了其在12.5至500千吉之间的大剂量电子束（EB）照射后的物理和化学特性。结果表明，高达50 kGy的EB辐照比传统的回收方法更有效，促进了分子修饰并实现了方便的分子重排。化学和热分析表明，在25 kGy辐照后，PP受到干扰，当辐照剂量达到250 kGy时，熔融温度下降，由于分子交联影响了形态和结晶相，特别是在PPrec样品中。据观察，Vicat试验不干扰PPrec的二次应用回收。剂量超过100 kGy至500 kGy的交联使PP成为填料，工业应用或用作能源的适当材料，增强了环境的可持续性。在聚合物加工中使用EB作为替代能源具有显著的优势，与传统的塑料回收方法相比，它是一种更可持续、更环保的方法。

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来源期刊

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.