The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE
Peroxide has been considered a chemical agent that can be used to tune the properties of polymeric materials. This research evaluated the influence of different concentrations of dialkyl peroxides on the mechanical, thermal, and morphological properties of linear low-density polyethylene (LLDPE) and...
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MDPI AG
2021-09-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/18/3062 |
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| author | Pollyana S. M. Cardoso Marcelo M. Ueki Josiane D. V. Barbosa Fabio C. Garcia Filho Benjamin S. Lazarus Joyce B. Azevedo |
| author_facet | Pollyana S. M. Cardoso Marcelo M. Ueki Josiane D. V. Barbosa Fabio C. Garcia Filho Benjamin S. Lazarus Joyce B. Azevedo |
| author_sort | Pollyana S. M. Cardoso |
| collection | DOAJ |
| description | Peroxide has been considered a chemical agent that can be used to tune the properties of polymeric materials. This research evaluated the influence of different concentrations of dialkyl peroxides on the mechanical, thermal, and morphological properties of linear low-density polyethylene (LLDPE) and ultra-high molecular weight polyethylene (UHMWPE). The neat polymer, as well as those with the addition of 1% and 2% by mass of dialkyl peroxides, were subjected to compression molding and immersion in water for 1 h, under controlled temperatures of 90 °C. The values of the gel content found in the samples indicated that the addition of peroxide to the LLDPE and to the UHMWPE promoted the formation of a reticulated network. The structure obtained by the crosslinking led to less reorganization of the chains during the crystallization process, resulting in the formation of imperfect crystals and, consequently, in the reduction in melting temperatures, crystallization and enthalpy. The mechanical properties were altered with the presence of the crosslinker. The polymers presented had predominant characteristics of a ductile material, with the occurrence of crazing with an increased peroxide content. |
| first_indexed | 2024-03-10T07:16:46Z |
| format | Article |
| id | doaj.art-c09d0d7f9abe47a49847c469536c7031 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T07:16:46Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-c09d0d7f9abe47a49847c469536c70312023-11-22T14:55:28ZengMDPI AGPolymers2073-43602021-09-011318306210.3390/polym13183062The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPEPollyana S. M. Cardoso0Marcelo M. Ueki1Josiane D. V. Barbosa2Fabio C. Garcia Filho3Benjamin S. Lazarus4Joyce B. Azevedo5Department of Materials, University Center SENAI CIMATEC, Salvador 41650-010, BA, BrazilGraduate Program in Materials Science and Engineering—P2CEM, Federal University of Sergipe (UFS), Aracaju 49100-000, SE, BrazilDepartment of Materials, University Center SENAI CIMATEC, Salvador 41650-010, BA, BrazilMilitary Institute of Engineering, Rio de Janeiro 22290-270, RJ, BrazilMaterials Science and Engineering Program, University of Califórnia San Diego, San Diego, CA 92093, USAInstitute of Science, Technology and Innovation, Federal University of Bahia, Salvador 42809-000, BA, BrazilPeroxide has been considered a chemical agent that can be used to tune the properties of polymeric materials. This research evaluated the influence of different concentrations of dialkyl peroxides on the mechanical, thermal, and morphological properties of linear low-density polyethylene (LLDPE) and ultra-high molecular weight polyethylene (UHMWPE). The neat polymer, as well as those with the addition of 1% and 2% by mass of dialkyl peroxides, were subjected to compression molding and immersion in water for 1 h, under controlled temperatures of 90 °C. The values of the gel content found in the samples indicated that the addition of peroxide to the LLDPE and to the UHMWPE promoted the formation of a reticulated network. The structure obtained by the crosslinking led to less reorganization of the chains during the crystallization process, resulting in the formation of imperfect crystals and, consequently, in the reduction in melting temperatures, crystallization and enthalpy. The mechanical properties were altered with the presence of the crosslinker. The polymers presented had predominant characteristics of a ductile material, with the occurrence of crazing with an increased peroxide content.https://www.mdpi.com/2073-4360/13/18/3062crosslinkingperoxideLLDPEUHMWPE |
| spellingShingle | Pollyana S. M. Cardoso Marcelo M. Ueki Josiane D. V. Barbosa Fabio C. Garcia Filho Benjamin S. Lazarus Joyce B. Azevedo The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE Polymers crosslinking peroxide LLDPE UHMWPE |
| title | The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE |
| title_full | The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE |
| title_fullStr | The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE |
| title_full_unstemmed | The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE |
| title_short | The Effect of Dialkyl Peroxide Crosslinking on the Properties of LLDPE and UHMWPE |
| title_sort | effect of dialkyl peroxide crosslinking on the properties of lldpe and uhmwpe |
| topic | crosslinking peroxide LLDPE UHMWPE |
| url | https://www.mdpi.com/2073-4360/13/18/3062 |
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