Unveiling the Effects of Thermal Aging on the Oxidative Stability of Biobased Low-Density Polyethylenes

Joanna Aniśko-Michalak; Anatolij Sokolohorskyj; Izabela Szafraniak-Wiza; Paulina Kosmela; Adam Piasecki; Mateusz Barczewski

doi:10.1021/acsomega.5c00636

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Title

Unveiling the Effects of Thermal Aging on the Oxidative Stability of Biobased Low-Density Polyethylenes

Authors

Joanna Aniśko-Michalak (WIM) ^{[ 1 ][ 2.9 ][ SzD ]}
Anatolij Sokolohorskyj
Izabela Szafraniak-Wiza (WIMiFT) ^{[ 2 ][ 2.8 ][ P ]}
Paulina Kosmela
Adam Piasecki (WIMiFT) ^{[ 2 ][ 2.8 ][ P ]}
Mateusz Barczewski (WIM) ^{[ 3 ][ 2.9 ][ P ]}

^{[ 1 ]} Wydział Inżynierii Mechanicznej, Politechnika Poznańska | ^{[ 2 ]} Instytut Inżynierii Materiałowej, Wydział Inżynierii Materiałowej i Fizyki Technicznej, Politechnika Poznańska | ^{[ 3 ]} Instytut Technologii Materiałów, Wydział Inżynierii Mechanicznej, Politechnika Poznańska | ^{[ SzD ]} doctoral school student | ^{[ P ]} employee

Scientific discipline (Law 2.0)

[2.8] Materials engineering
[2.9] Mechanical engineering

Year of publication

2025

Published in

ACS Omega

Journal year: 2025 | Journal volume: vol. 10 | Journal number: iss. 24

Article type

scientific article

Publication language

english

Abstract

EN The study evaluates biobased polyethylene (LDPE) structural changes induced by long-term thermal oxidation. The three grades of LDPE differentiated with structural properties were exposed to 90, 100, and 110 °C in an air atmosphere for 20 days. After aging, samples were comprehensively analyzed by Fourier transform infrared (FTIR) spectroscopy, focused on carbonyl group development, and quantified by the carbonyl index (CI). Detailed analysis, based on the deconvolution of the FTIR spectra, identifies each carbonyl compound, whose content varies depending on the structure of the LDPE. The changes in the crystallinity were investigated via X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The obtained results were supplemented by oxidation induction time (OIT), oxygen onset temperature (OOT), and an in-depth analysis of the rheological properties. The tested polymers undergo degradation with behavior similar to UV degradation of petrochemical ones, and the cross-linking process surpasses chain scission for samples degraded at 100 and 110 °C.

Date of online publication

11.06.2025

Pages (from - to)

25432 - 25450

DOI

10.1021/acsomega.5c00636

URL

https://pubs.acs.org/doi/10.1021/acsomega.5c00636

License type

CC BY (attribution alone)

Open Access Mode

open journal