Construction, Physical Properties and Foaming Behavior of High-Content Lignin Reinforced Low-Density Polyethylene Biocomposites
Lignin was chemically modified with oligomeric polyethylene (oPE) to form oPE-grafted lignin (oPE-<i>g</i>-lignin) via lignin surface acylation and a radical coupling reaction with oPE. Then, pristine lignin and oPE-<i>g</i>-lignin were successfully compounded with low-densit...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/13/2688 |
| _version_ | 1797408336718594048 |
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| author | Seo-Hwa Hong Seok-Ho Hwang |
| author_facet | Seo-Hwa Hong Seok-Ho Hwang |
| author_sort | Seo-Hwa Hong |
| collection | DOAJ |
| description | Lignin was chemically modified with oligomeric polyethylene (oPE) to form oPE-grafted lignin (oPE-<i>g</i>-lignin) via lignin surface acylation and a radical coupling reaction with oPE. Then, pristine lignin and oPE-<i>g</i>-lignin were successfully compounded with low-density polyethylene (LDPE) through a typical compounding technique. Due to the oligomeric polyethylene chains grafted to the lignin’s surface, the interfacial adhesion between the lignin particles and the LDPE matrix was considerably better in the oPE-<i>g</i>-lignin/LDPE biocomposite than in the pristine-lignin/LDPE one. This demonstrated that oPE-<i>g</i>-lignin can serve as both a biodegradable reinforcing filler, which can be loaded with a higher lignin content at 50 wt-%, and a nucleating agent to increase the crystallization temperature and improve the tensile characteristics of its LDPE biocomposites. Moreover, the foamability of the lignin-reinforced LDPE biocomposites was studied in the presence of a chemical blowing agent (azodicarbonamide) with dicumyl peroxide; for an oPE-<i>g</i>-lignin content up to 20 wt-%, the cell size distribution was quite uniform, and the foam expansion ratios (17.69 ± 0.92) were similar to those of the neat LDPE foam (17.04 ± 0.44). |
| first_indexed | 2024-03-09T03:56:59Z |
| format | Article |
| id | doaj.art-d772ac34abc84cfbb3e665a345856aa7 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T03:56:59Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-d772ac34abc84cfbb3e665a345856aa72023-12-03T14:19:03ZengMDPI AGPolymers2073-43602022-06-011413268810.3390/polym14132688Construction, Physical Properties and Foaming Behavior of High-Content Lignin Reinforced Low-Density Polyethylene BiocompositesSeo-Hwa Hong0Seok-Ho Hwang1Materials Chemistry & Engineering Laboratory, Department of Polymer Science & Engineering, Dankook University, Yongin 16890, Gyeonggi-do, KoreaMaterials Chemistry & Engineering Laboratory, Department of Polymer Science & Engineering, Dankook University, Yongin 16890, Gyeonggi-do, KoreaLignin was chemically modified with oligomeric polyethylene (oPE) to form oPE-grafted lignin (oPE-<i>g</i>-lignin) via lignin surface acylation and a radical coupling reaction with oPE. Then, pristine lignin and oPE-<i>g</i>-lignin were successfully compounded with low-density polyethylene (LDPE) through a typical compounding technique. Due to the oligomeric polyethylene chains grafted to the lignin’s surface, the interfacial adhesion between the lignin particles and the LDPE matrix was considerably better in the oPE-<i>g</i>-lignin/LDPE biocomposite than in the pristine-lignin/LDPE one. This demonstrated that oPE-<i>g</i>-lignin can serve as both a biodegradable reinforcing filler, which can be loaded with a higher lignin content at 50 wt-%, and a nucleating agent to increase the crystallization temperature and improve the tensile characteristics of its LDPE biocomposites. Moreover, the foamability of the lignin-reinforced LDPE biocomposites was studied in the presence of a chemical blowing agent (azodicarbonamide) with dicumyl peroxide; for an oPE-<i>g</i>-lignin content up to 20 wt-%, the cell size distribution was quite uniform, and the foam expansion ratios (17.69 ± 0.92) were similar to those of the neat LDPE foam (17.04 ± 0.44).https://www.mdpi.com/2073-4360/14/13/2688ligninlow-density polyethylenebiocompositeschemical modificationfoamability |
| spellingShingle | Seo-Hwa Hong Seok-Ho Hwang Construction, Physical Properties and Foaming Behavior of High-Content Lignin Reinforced Low-Density Polyethylene Biocomposites Polymers lignin low-density polyethylene biocomposites chemical modification foamability |
| title | Construction, Physical Properties and Foaming Behavior of High-Content Lignin Reinforced Low-Density Polyethylene Biocomposites |
| title_full | Construction, Physical Properties and Foaming Behavior of High-Content Lignin Reinforced Low-Density Polyethylene Biocomposites |
| title_fullStr | Construction, Physical Properties and Foaming Behavior of High-Content Lignin Reinforced Low-Density Polyethylene Biocomposites |
| title_full_unstemmed | Construction, Physical Properties and Foaming Behavior of High-Content Lignin Reinforced Low-Density Polyethylene Biocomposites |
| title_short | Construction, Physical Properties and Foaming Behavior of High-Content Lignin Reinforced Low-Density Polyethylene Biocomposites |
| title_sort | construction physical properties and foaming behavior of high content lignin reinforced low density polyethylene biocomposites |
| topic | lignin low-density polyethylene biocomposites chemical modification foamability |
| url | https://www.mdpi.com/2073-4360/14/13/2688 |
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