| Autor: |
Yurii V. Perukhin, Svetlana A. Bogdanova, Matthew P. Confer, Georgii V. Malkov, Vadim G. Nikolsky, Sadulla R. Allayarov, David A. Dixon, Sergei Demidov, Igor V. Zyukin, I. F. Shaimukhametova, Yuliya V. Podvalnaya |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Polymer. 237:124342 |
| ISSN: |
0032-3861 |
| DOI: |
10.1016/j.polymer.2021.124342 |
| Popis: |
The optical and surface-energy properties of polyethylene (PE) subjected to γ-irradiation and post-radiation, high temperature, shear grinding are presented. Comparison of the IR spectra of the initial and γ-irradiated PE shows that oxygen-containing groups and unsaturated bonds in the polymer macromolecules are formed and accumulate during their radiolysis in air, increasing with γ-irradiation dose. A redistribution of the products of radiation-chemical conversion on the surface of the polymer granules throughout the entire volume of the powder occurs after high-temperature shear milling to a powder as observed in the IR spectrum. Polar functional groups due to oxidation reactions are observed on the surface layer of the sample after post-radiation grinding. The initial polymer surface is weakly basic with an acidity parameter of −0.34. The value of the acidity parameter of the sample made of ground irradiated PE has an acidic surface with an acidity parameter of 0.65. γ irradiation of the secondary processing of PE waste with high-temperature shear grinding is a promising approach to obtain a secondary PE powder with specified parameters and different degrees of functionalization. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect