Selected Properties of Formaldehyde-Free Polymer-Straw Boards Made from Different Types of Thermoplastics and Different Kinds of Straw
This research investigated the effects of different thermoplastics types and different kinds of straw on selected properties of polymer-straw boards. Polyethylene, polyethylene, and polystyrene of virgin and of recycled origin were used for bonding the boards. Three kinds of straw were used: rape (&...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/5/1216 |
| _version_ | 1797414141056516096 |
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| author | Radosław Mirski Aleksandra Banaszak Pavlo Bekhta |
| author_facet | Radosław Mirski Aleksandra Banaszak Pavlo Bekhta |
| author_sort | Radosław Mirski |
| collection | DOAJ |
| description | This research investigated the effects of different thermoplastics types and different kinds of straw on selected properties of polymer-straw boards. Polyethylene, polyethylene, and polystyrene of virgin and of recycled origin were used for bonding the boards. Three kinds of straw were used: rape (<i>Brassica napus</i> L. var. napus), triticale (<i>Triticosecale Witt</i> b m.), and rye (<i>Secale</i> L.). Five-layer polymer-straw boards were produced. The obtained boards differed in both the materials they were made of and the moisture content (7, 25, and 2% for the core, the middle, and the face layers, respectively), and 30% of straw particles were substituted with thermoplastics added to the face layers. It was found that properties of polymer-straw boards strongly depend on both the kind of straw and the type of polymer used. The best mechanical properties were obtained for rye straw and polystyrene or recycled polymers, whereas the best hydrophobic properties were observed for rape straw combined with recycled polyethylene or polypropylene. Although recycled polymers improved the hydrophobic properties of the boards, they impaired their mechanical properties in comparison with the reference ones. However, in terms of bending strength, they still met the requirements for heavy duty load-bearing boards for use in humid conditions (20 MPa for P7 boards according to EN 312). |
| first_indexed | 2024-03-09T05:28:49Z |
| format | Article |
| id | doaj.art-ef02b4cf6e18404c95339b6e58cdaffe |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T05:28:49Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-ef02b4cf6e18404c95339b6e58cdaffe2023-12-03T12:34:46ZengMDPI AGMaterials1996-19442021-03-01145121610.3390/ma14051216Selected Properties of Formaldehyde-Free Polymer-Straw Boards Made from Different Types of Thermoplastics and Different Kinds of StrawRadosław Mirski0Aleksandra Banaszak1Pavlo Bekhta2Department of Wood-Based Materials, Poznań University of Life Sciences, 60-627 Poznań, PolandDepartment of Wood-Based Materials, Poznań University of Life Sciences, 60-627 Poznań, PolandDepartment of Wood-Based Composites, Cellulose, and Paper, Ukrainian National Forestry University, 79057 Lviv, UkraineThis research investigated the effects of different thermoplastics types and different kinds of straw on selected properties of polymer-straw boards. Polyethylene, polyethylene, and polystyrene of virgin and of recycled origin were used for bonding the boards. Three kinds of straw were used: rape (<i>Brassica napus</i> L. var. napus), triticale (<i>Triticosecale Witt</i> b m.), and rye (<i>Secale</i> L.). Five-layer polymer-straw boards were produced. The obtained boards differed in both the materials they were made of and the moisture content (7, 25, and 2% for the core, the middle, and the face layers, respectively), and 30% of straw particles were substituted with thermoplastics added to the face layers. It was found that properties of polymer-straw boards strongly depend on both the kind of straw and the type of polymer used. The best mechanical properties were obtained for rye straw and polystyrene or recycled polymers, whereas the best hydrophobic properties were observed for rape straw combined with recycled polyethylene or polypropylene. Although recycled polymers improved the hydrophobic properties of the boards, they impaired their mechanical properties in comparison with the reference ones. However, in terms of bending strength, they still met the requirements for heavy duty load-bearing boards for use in humid conditions (20 MPa for P7 boards according to EN 312).https://www.mdpi.com/1996-1944/14/5/1216polymer-straw boardsthermoplastic polymersstrawhydrophobicitymechanical properties |
| spellingShingle | Radosław Mirski Aleksandra Banaszak Pavlo Bekhta Selected Properties of Formaldehyde-Free Polymer-Straw Boards Made from Different Types of Thermoplastics and Different Kinds of Straw Materials polymer-straw boards thermoplastic polymers straw hydrophobicity mechanical properties |
| title | Selected Properties of Formaldehyde-Free Polymer-Straw Boards Made from Different Types of Thermoplastics and Different Kinds of Straw |
| title_full | Selected Properties of Formaldehyde-Free Polymer-Straw Boards Made from Different Types of Thermoplastics and Different Kinds of Straw |
| title_fullStr | Selected Properties of Formaldehyde-Free Polymer-Straw Boards Made from Different Types of Thermoplastics and Different Kinds of Straw |
| title_full_unstemmed | Selected Properties of Formaldehyde-Free Polymer-Straw Boards Made from Different Types of Thermoplastics and Different Kinds of Straw |
| title_short | Selected Properties of Formaldehyde-Free Polymer-Straw Boards Made from Different Types of Thermoplastics and Different Kinds of Straw |
| title_sort | selected properties of formaldehyde free polymer straw boards made from different types of thermoplastics and different kinds of straw |
| topic | polymer-straw boards thermoplastic polymers straw hydrophobicity mechanical properties |
| url | https://www.mdpi.com/1996-1944/14/5/1216 |
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