Thermal and Mechanical Properties of the Recycled and Virgin PET—Part I
In various countries, polyethylene terephthalate (PET) represents one of the plastics with a very high recycling rate. Since currently there is no analytical method enabling direct distinction between recycled PET (rPET) and virgin PET (vPET), there are various attempts to differentiate these materi...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-03-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/7/1326 |
| _version_ | 1797437984362987520 |
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| author | Yasemin Celik Madina Shamsuyeva Hans Josef Endres |
| author_facet | Yasemin Celik Madina Shamsuyeva Hans Josef Endres |
| author_sort | Yasemin Celik |
| collection | DOAJ |
| description | In various countries, polyethylene terephthalate (PET) represents one of the plastics with a very high recycling rate. Since currently there is no analytical method enabling direct distinction between recycled PET (rPET) and virgin PET (vPET), there are various attempts to differentiate these materials indirectly. One of these approaches claims that the recycling of PET leads to polymer chain degradation, which is reflected in changed thermal, mechanical and crystalline properties, and testing of these properties can therefore be used to distinguish rPET and vPET. However, there are many sources leading to changes in the molecular structure and consequently to the changes of the above-mentioned properties of the PET. The purpose of this study is to analyze the glass transition and melting temperature, degree of crystallinity as well as bending and impact properties of 20 different commercially available PET recyclates from 14 suppliers and evaluate the results with respect to the literature values for vPET. The main results of this study show that the range of vPET properties is so broad that all of the corresponding properties of the tested rPET lie within this range. |
| first_indexed | 2024-03-09T11:30:32Z |
| format | Article |
| id | doaj.art-62281ead215d4348adfb7049d7243fbd |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T11:30:32Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-62281ead215d4348adfb7049d7243fbd2023-11-30T23:52:55ZengMDPI AGPolymers2073-43602022-03-01147132610.3390/polym14071326Thermal and Mechanical Properties of the Recycled and Virgin PET—Part IYasemin Celik0Madina Shamsuyeva1Hans Josef Endres2IKK—Institute of Plastics and Circular Economy, Leibniz University Hanover, An der Universitaet 2, 30823 Garbsen, GermanyIKK—Institute of Plastics and Circular Economy, Leibniz University Hanover, An der Universitaet 2, 30823 Garbsen, GermanyIKK—Institute of Plastics and Circular Economy, Leibniz University Hanover, An der Universitaet 2, 30823 Garbsen, GermanyIn various countries, polyethylene terephthalate (PET) represents one of the plastics with a very high recycling rate. Since currently there is no analytical method enabling direct distinction between recycled PET (rPET) and virgin PET (vPET), there are various attempts to differentiate these materials indirectly. One of these approaches claims that the recycling of PET leads to polymer chain degradation, which is reflected in changed thermal, mechanical and crystalline properties, and testing of these properties can therefore be used to distinguish rPET and vPET. However, there are many sources leading to changes in the molecular structure and consequently to the changes of the above-mentioned properties of the PET. The purpose of this study is to analyze the glass transition and melting temperature, degree of crystallinity as well as bending and impact properties of 20 different commercially available PET recyclates from 14 suppliers and evaluate the results with respect to the literature values for vPET. The main results of this study show that the range of vPET properties is so broad that all of the corresponding properties of the tested rPET lie within this range.https://www.mdpi.com/2073-4360/14/7/1326polyethylene terephthalate (PET)plastic recyclatesplastic recyclingcircular economymechanical recyclingevidence of recycling |
| spellingShingle | Yasemin Celik Madina Shamsuyeva Hans Josef Endres Thermal and Mechanical Properties of the Recycled and Virgin PET—Part I Polymers polyethylene terephthalate (PET) plastic recyclates plastic recycling circular economy mechanical recycling evidence of recycling |
| title | Thermal and Mechanical Properties of the Recycled and Virgin PET—Part I |
| title_full | Thermal and Mechanical Properties of the Recycled and Virgin PET—Part I |
| title_fullStr | Thermal and Mechanical Properties of the Recycled and Virgin PET—Part I |
| title_full_unstemmed | Thermal and Mechanical Properties of the Recycled and Virgin PET—Part I |
| title_short | Thermal and Mechanical Properties of the Recycled and Virgin PET—Part I |
| title_sort | thermal and mechanical properties of the recycled and virgin pet part i |
| topic | polyethylene terephthalate (PET) plastic recyclates plastic recycling circular economy mechanical recycling evidence of recycling |
| url | https://www.mdpi.com/2073-4360/14/7/1326 |
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