Oxygen anomalous diffusion during photooxidation of polypropylene
Abstract This research paper is about the calculation of the diffusion coefficient and the oxygen concentration profile along polypropylene samples exposed to photooxidation in a dry environment. In this degradation process, oxygen diffusion is anomalous, as it is affected by structural modification...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Polímeros
2025-07-01
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| Series: | Polímeros |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282025000200610&lng=en&tlng=en |
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| _version_ | 1849317231438069760 |
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| author | José William de Lima Souza Lucas Cordeiro de Oliveira Taynah Pereira Galdino Marcus Vinicius Lia Fook Rômulo Feitosa Navarro |
| author_facet | José William de Lima Souza Lucas Cordeiro de Oliveira Taynah Pereira Galdino Marcus Vinicius Lia Fook Rômulo Feitosa Navarro |
| author_sort | José William de Lima Souza |
| collection | DOAJ |
| description | Abstract This research paper is about the calculation of the diffusion coefficient and the oxygen concentration profile along polypropylene samples exposed to photooxidation in a dry environment. In this degradation process, oxygen diffusion is anomalous, as it is affected by structural modifications that occur over the exposure time. Thus, the diffusion coefficient starts to depend on time and the common solutions for Fick's 2nd Law for diffusion become inoperative for importante time intervals. In this work, a modification is proposed in the calculation of the diffusivity and, consequently, of the solution for the oxygen concentration profile in diffusion. |
| format | Article |
| id | doaj-art-963fd6d45f9741bcb7204bd86dd6b09f |
| institution | Kabale University |
| issn | 1678-5169 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Associação Brasileira de Polímeros |
| record_format | Article |
| series | Polímeros |
| spelling | doaj-art-963fd6d45f9741bcb7204bd86dd6b09f2025-08-20T03:51:18ZengAssociação Brasileira de PolímerosPolímeros1678-51692025-07-0135210.1590/0104-1428.20240082Oxygen anomalous diffusion during photooxidation of polypropyleneJosé William de Lima Souzahttps://orcid.org/0000-0002-1786-8987Lucas Cordeiro de Oliveirahttps://orcid.org/0000-0002-0853-3472Taynah Pereira Galdinohttps://orcid.org/0000-0003-4177-6430Marcus Vinicius Lia Fookhttps://orcid.org/0000-0002-8566-920XRômulo Feitosa Navarrohttps://orcid.org/0009-0009-2071-4653Abstract This research paper is about the calculation of the diffusion coefficient and the oxygen concentration profile along polypropylene samples exposed to photooxidation in a dry environment. In this degradation process, oxygen diffusion is anomalous, as it is affected by structural modifications that occur over the exposure time. Thus, the diffusion coefficient starts to depend on time and the common solutions for Fick's 2nd Law for diffusion become inoperative for importante time intervals. In this work, a modification is proposed in the calculation of the diffusivity and, consequently, of the solution for the oxygen concentration profile in diffusion.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282025000200610&lng=en&tlng=enanomalous diffusiondiffusion coefficientoxygen diffusivityphotooxidationtime dependent |
| spellingShingle | José William de Lima Souza Lucas Cordeiro de Oliveira Taynah Pereira Galdino Marcus Vinicius Lia Fook Rômulo Feitosa Navarro Oxygen anomalous diffusion during photooxidation of polypropylene Polímeros anomalous diffusion diffusion coefficient oxygen diffusivity photooxidation time dependent |
| title | Oxygen anomalous diffusion during photooxidation of polypropylene |
| title_full | Oxygen anomalous diffusion during photooxidation of polypropylene |
| title_fullStr | Oxygen anomalous diffusion during photooxidation of polypropylene |
| title_full_unstemmed | Oxygen anomalous diffusion during photooxidation of polypropylene |
| title_short | Oxygen anomalous diffusion during photooxidation of polypropylene |
| title_sort | oxygen anomalous diffusion during photooxidation of polypropylene |
| topic | anomalous diffusion diffusion coefficient oxygen diffusivity photooxidation time dependent |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282025000200610&lng=en&tlng=en |
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