Recycled Poly(Ethylene Terephthalate) from Waste Textiles with Improved Thermal and Rheological Properties by Chain Extension
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Synthesis of Copolymers
2.3. Blending Process of PET with Chain Extenders
2.4. The Melt Flow Rate
2.5. Intrinsic Viscosity
2.6. Gel Permeation Chromatography
2.7. Nuclear Magnetic Resonance Spectroscopy
2.8. Thermal Gravimetric Analysis
2.9. Differential Scanning Calorimetry
2.10. Dynamic Rheological Measurements
3. Results
3.1. Properties of the rPET-F, rPET-B and vPET
3.2. Synthesis and Characterization of Chain Extender
3.3. IV and MFI of the Chain Extended PET Samples
3.4. Thermal Characterization of the PET Samples
3.5. Rheological Behavior of the PET Samples
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Samples | IV (dL/g) | MFR (g/10 min) | Tg (°C) | Tm (°C) | Tc (°C) | Tonset (°C) |
---|---|---|---|---|---|---|
rPET-F | 0.58 | 48.8 | 80.1 | 248.1 | 209.4 | 385.8 |
rPET-B | 0.66 | 18.6 | 80.7 | 251.0 | 202.1 | 398.7 |
vPET | 0.68 | 14.6 | 83.9 | 254.9 | 179.0 | 400.6 |
Samples | GMA (mol%) | S (mol%) | MMA (mol%) | Nepoxy | Mn (g/mol) | Mw (g/mol) | Epoxide Number (mol/100 g) | PDI |
---|---|---|---|---|---|---|---|---|
PGMS1 | 76.0 1 | 11.0 1 | 13.0 1 | 152 | 63,000 2 | 99,000 2 | 0.24 | 1.58 2 |
PGMS2 | 70.4 1 | 14.1 1 | 15.5 1 | 70 | 38,000 2 | 61,000 2 | 0.18 | 1.59 2 |
PGMS3 | 60.6 1 | 19.4 1 | 20.0 1 | 38 | 28,000 2 | 51,000 2 | 0.14 | 1.80 2 |
ADR-4468 | 30–50 | - | - | 5–9 | <2500 | 7250 | 0.17–0.3 | >3 |
EPOX | - | - | - | 2 | 202 | - | 0.99 | - |
Samples | MFR (g/10 min) | IV (dL/g) | Mn (g/mol) | Insoluble Content (%) |
---|---|---|---|---|
0.5%EPOX/rPET-F | 50.2 | 0.62 | 17,100 | - |
1.0%EPOX/rPET-F | 44.6 | 0.66 | 18,400 | - |
1.5%EPOX/rPET-F | 24.2 | 0.70 | 19,800 | - |
0.5%ADR/rPET-F | 18.6 | 0.72 | 20,500 | - |
1.0%ADR/rPET-F | 15.5 | 0.78 | 22,600 | - |
1.5%ADR/rPET-F | 13.4 | 0.86 | 25,400 | - |
0.5%PGMS1/rPET-F | 16.3 | - | 6.7 | |
1.0%PGMS1/rPET-F | 13.6 | - | 10.7 | |
1.5%PGMS1/rPET-F | 10.4 | - | 14.7 | |
0.5%PGMS2/rPET-F | 16.4 | - | 5.3 | |
1.0%PGMS2/rPET-F | 14.8 | - | 10.4 | |
1.5%PGMS2/rPET-F | 11.0 | - | 13.1 | |
0.5%PGMS3/rPET-F | 16.3 | - | 4.0 | |
1.0%PGMS3/rPET-F | 13.3 | - | 8.9 | |
1.5%PGMS3/rPET-F | 13.2 | - | 10.6 |
Samples | Tc (°C) | Tm (°C) | Tg (°C) |
---|---|---|---|
0.5%EPOX/rPET-F | 210.7 | 246.4 | 75.7 |
1.0%EPOX/rPET-F | 206.9 | 244.5 | 73.7 |
1.5%EPOX/rPET-F | 198.7 | 240.2 | 72.1 |
0.5%ADR/rPET-F | 208.0 | 247.2 | 77.5 |
1.0%ADR/rPET-F | 205.8 | 245.5 | 78.1 |
1.5%ADR/rPET-F | 204.5 | 245.7 | 77.5 |
0.5%PGMS1/rPET-F | 215.5 | 250.4 | 78.5 |
1.0%PGMS1/rPET-F | 215.5 | 249.9 | 77.5 |
1.5%PGMS1/rPET-F | 214.7 | 249.5 | 77.9 |
0.5%PGMS2/rPET-F | 215.7 | 248.9 | 77.3 |
1.0%PGMS2/rPET-F | 214.5 | 250.2 | 79.1 |
1.5%PGMS2/rPET-F | 214.3 | 249.0 | 77.5 |
0.5%PGMS3/rPET-F | 215.5 | 250.4 | 76.9 |
1.0%PGMS3/rPET-F | 213.8 | 249.7 | 78.1 |
1.5%PGMS3/rPET-F | 213.4 | 249.0 | 77.6 |
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Wu, W.-J.; Sun, X.-L.; Chen, Q.; Qian, Q. Recycled Poly(Ethylene Terephthalate) from Waste Textiles with Improved Thermal and Rheological Properties by Chain Extension. Polymers 2022, 14, 510. https://doi.org/10.3390/polym14030510
Wu W-J, Sun X-L, Chen Q, Qian Q. Recycled Poly(Ethylene Terephthalate) from Waste Textiles with Improved Thermal and Rheological Properties by Chain Extension. Polymers. 2022; 14(3):510. https://doi.org/10.3390/polym14030510
Chicago/Turabian StyleWu, Wen-Jun, Xiao-Li Sun, Qinghua Chen, and Qingrong Qian. 2022. "Recycled Poly(Ethylene Terephthalate) from Waste Textiles with Improved Thermal and Rheological Properties by Chain Extension" Polymers 14, no. 3: 510. https://doi.org/10.3390/polym14030510