Influence of Viscose Fibre Geometry on the Structure–Property Relationships of High-Density Polyethylene Composites
This study investigated the influence of viscose fibre (VF) geometry on the microstructures and resulting properties of high-density polyethylene (HDPE) composites. Seven types of viscose fibres varying in cross-section shape, linear density, and length were pelletised, compounded into HDPE with a t...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/20/4389 |
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| author | Janez Slapnik Gregor Kraft Thomas Wilhelm Marcel Hribernik Iztok Švab Thomas Lucyshyn Gerald Pinter |
| author_facet | Janez Slapnik Gregor Kraft Thomas Wilhelm Marcel Hribernik Iztok Švab Thomas Lucyshyn Gerald Pinter |
| author_sort | Janez Slapnik |
| collection | DOAJ |
| description | This study investigated the influence of viscose fibre (VF) geometry on the microstructures and resulting properties of high-density polyethylene (HDPE) composites. Seven types of viscose fibres varying in cross-section shape, linear density, and length were pelletised, compounded into HDPE with a twin-screw extruder, and injection moulded. The microstructures of the composites were characterised by investigating their cross-sections and by extracting the fibres and measuring their lengths using optical microscopy (OM). The mechanical and thermal properties of the composites were characterised using differential scanning calorimetry (DSC), tensile tests, Charpy impact tests, and dynamic mechanical analysis (DMA). The composites prepared using cylindrical fibres with a linear density of 1.7 dtex exhibited the best fibre dispersion, highest orientation, and lowest fibre–fibre contact area. The decrease in the linear density of the cylindrical fibres resulted in increasingly worse dispersion and orientation, while composites containing non-cylindrical fibres exhibited a comparably larger fibre–fibre contact area. The initial fibre length of about 3 to 10 mm decreased to the mean values of 0.29 mm to 0.41 mm during processing, depending on the initial geometry. In general, cylindrical fibres exhibited a superior reinforcing effect in comparison to non-cylindrical fibres. The composites containing cylindrical fibres with a linear density of 1.7 dtex and a length of 5 mm exhibited the best reinforcing effect with an increase in tensile modulus and strength of 323% and 141%, respectively. |
| first_indexed | 2024-03-09T19:32:27Z |
| format | Article |
| id | doaj.art-37c2abb7bb804a208336f90620d62294 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T19:32:27Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-37c2abb7bb804a208336f90620d622942023-11-24T02:08:31ZengMDPI AGPolymers2073-43602022-10-011420438910.3390/polym14204389Influence of Viscose Fibre Geometry on the Structure–Property Relationships of High-Density Polyethylene CompositesJanez Slapnik0Gregor Kraft1Thomas Wilhelm2Marcel Hribernik3Iztok Švab4Thomas Lucyshyn5Gerald Pinter6Faculty of Polymer Technology, Ozare 19, 2380 Slovenj Gradec, SloveniaFaculty of Polymer Technology, Ozare 19, 2380 Slovenj Gradec, SloveniaFaculty of Polymer Technology, Ozare 19, 2380 Slovenj Gradec, SloveniaFaculty of Polymer Technology, Ozare 19, 2380 Slovenj Gradec, SloveniaFaculty of Polymer Technology, Ozare 19, 2380 Slovenj Gradec, SloveniaDepartment of Polymer Engineering and Science, Polymer Processing, Montanuniversitaet Leoben, Otto Gloeckel-Strasse 2, 8700 Leoben, AustriaDepartment of Polymer Engineering and Science, Polymer Processing, Montanuniversitaet Leoben, Otto Gloeckel-Strasse 2, 8700 Leoben, AustriaThis study investigated the influence of viscose fibre (VF) geometry on the microstructures and resulting properties of high-density polyethylene (HDPE) composites. Seven types of viscose fibres varying in cross-section shape, linear density, and length were pelletised, compounded into HDPE with a twin-screw extruder, and injection moulded. The microstructures of the composites were characterised by investigating their cross-sections and by extracting the fibres and measuring their lengths using optical microscopy (OM). The mechanical and thermal properties of the composites were characterised using differential scanning calorimetry (DSC), tensile tests, Charpy impact tests, and dynamic mechanical analysis (DMA). The composites prepared using cylindrical fibres with a linear density of 1.7 dtex exhibited the best fibre dispersion, highest orientation, and lowest fibre–fibre contact area. The decrease in the linear density of the cylindrical fibres resulted in increasingly worse dispersion and orientation, while composites containing non-cylindrical fibres exhibited a comparably larger fibre–fibre contact area. The initial fibre length of about 3 to 10 mm decreased to the mean values of 0.29 mm to 0.41 mm during processing, depending on the initial geometry. In general, cylindrical fibres exhibited a superior reinforcing effect in comparison to non-cylindrical fibres. The composites containing cylindrical fibres with a linear density of 1.7 dtex and a length of 5 mm exhibited the best reinforcing effect with an increase in tensile modulus and strength of 323% and 141%, respectively.https://www.mdpi.com/2073-4360/14/20/4389thermoplastic matrix compositeshigh-density polyethylenerenewable fibresman-made cellulose fibresfibre geometrycompounding |
| spellingShingle | Janez Slapnik Gregor Kraft Thomas Wilhelm Marcel Hribernik Iztok Švab Thomas Lucyshyn Gerald Pinter Influence of Viscose Fibre Geometry on the Structure–Property Relationships of High-Density Polyethylene Composites Polymers thermoplastic matrix composites high-density polyethylene renewable fibres man-made cellulose fibres fibre geometry compounding |
| title | Influence of Viscose Fibre Geometry on the Structure–Property Relationships of High-Density Polyethylene Composites |
| title_full | Influence of Viscose Fibre Geometry on the Structure–Property Relationships of High-Density Polyethylene Composites |
| title_fullStr | Influence of Viscose Fibre Geometry on the Structure–Property Relationships of High-Density Polyethylene Composites |
| title_full_unstemmed | Influence of Viscose Fibre Geometry on the Structure–Property Relationships of High-Density Polyethylene Composites |
| title_short | Influence of Viscose Fibre Geometry on the Structure–Property Relationships of High-Density Polyethylene Composites |
| title_sort | influence of viscose fibre geometry on the structure property relationships of high density polyethylene composites |
| topic | thermoplastic matrix composites high-density polyethylene renewable fibres man-made cellulose fibres fibre geometry compounding |
| url | https://www.mdpi.com/2073-4360/14/20/4389 |
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