Details
| Original language | English |
|---|---|
| Article number | 1326 |
| Number of pages | 13 |
| Journal | Polymers |
| Volume | 14 |
| Issue number | 7 |
| Early online date | 24 Mar 2022 |
| Publication status | Published - 1 Apr 2022 |
Abstract
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.
Keywords
- circular economy, evidence of recycling, mechanical recycling, plastic recyclates, plastic recycling, polyethylene terephthalate (PET)
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Polymers and Plastics
Sustainable Development Goals
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In: Polymers, Vol. 14, No. 7, 1326, 01.04.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Thermal and Mechanical Properties of the Recycled and Virgin PET—Part I
AU - Celik, Yasemin
AU - Shamsuyeva, Madina
AU - Endres, Hans Josef
N1 - Funding Information: Funding: This research received no external funding and was financed from institutional funds only.
PY - 2022/4/1
Y1 - 2022/4/1
N2 - 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.
AB - 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.
KW - circular economy
KW - evidence of recycling
KW - mechanical recycling
KW - plastic recyclates
KW - plastic recycling
KW - polyethylene terephthalate (PET)
UR - http://www.scopus.com/inward/record.url?scp=85127923369&partnerID=8YFLogxK
U2 - 10.3390/polym14071326
DO - 10.3390/polym14071326
M3 - Article
AN - SCOPUS:85127923369
VL - 14
JO - Polymers
JF - Polymers
SN - 2073-4360
IS - 7
M1 - 1326
ER -