Preparation and Characterization of Fluorinated Hydrophobic UV-Crosslinkable Thiol-Ene Polyurethane Coatings
Abstract
:1. Introduction
2. Experimental
2.1. Materials
2.2. Synthesis of HEA-Terminated Polyurethane Resins
2.3. Preparation of Complex Coating Solutions and Coatings
2.4. Characterization
3. Results and Discussion
3.1. FTIR Analysis
3.2. 1H NMR Analysis
3.3. Photo-Polymerization Kinetics Analysis
3.4. Coating Properties Analysis
3.5. Yellowing Resistance
3.6. Contact Angle and Dispersion Surface Energy Analysis
3.7. Mechanical Properties
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Sample | Mn (g/mol) | Mw (g/mol) | PDI | Solid Content (%) | Viscosity (cp) |
---|---|---|---|---|---|
HTPU | 8.65 × 103 | 9.34 × 103 | 1.08 | 50 | 5.4 × 103 |
Additives | Formulation | ||||||||
---|---|---|---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
EFCSA (g) | 0 | 1 | 2 | 3 | 5 | 5 | 5 | 5 | 5 |
PETMP (g) | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 3 | 4 |
Properties | Formulation | ||||
---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | |
Pencil hardness | 5B | 4B | 3B | 2B | 2B |
Tape adhesion | 4 | 3 | 3 | 2 | 2 |
Water absorption (%) * | 5.2 ± 0.2a | 3.5 ± 0.3b | 2.7 ± 0.6c | 2.1 ± 0.2d | 1.8 ± 0.1e |
Glossiness (°) * | 65.1 ± 1.0e | 67.5 ± 0.6d | 70.2 ± 1.2c | 75.6 ± 1.4b | 78.2 ± 0.3a |
Properties | Formulation | ||||
---|---|---|---|---|---|
5 | 6 | 7 | 8 | 9 | |
Pencil hardness | 2B | 2B | 2B | B | HB |
Tape adhesion | 2 | 3 | 3 | 3 | 3 |
Water absorption (%) * | 1.8 ± 0.1b | 2.3 ± 0.5a | 1.8 ± 0.1b | 1.4 ± 0.1c | 1.2 ± 0.6c |
Glossiness (°) * | 78.2 ± 0.3d | 74.3 ± 2.4e | 80.6 ± 0.4c | 83.1 ± 0.6b | 86.8 ± 0.9a |
Properties | EFCSA Content (%) | |||||
---|---|---|---|---|---|---|
0 | 1 | 2 | 3 | 4 | 5 | |
Contact angles (°) | 82.5 | 92.3 | 95.6 | 102.3 | 104.3 | 108.6 |
Dispersion surface energies (mN/m) | 70.6 | 50.9 | 45.2 | 34.2 | 31.3 | 25.6 |
Properties | PETMP Content (wt %) | |||||
---|---|---|---|---|---|---|
0 | 0.5 | 1 | 2 | 3 | 4 | |
Tensile strength at break (MPa) | 1.63 ± 0.17d | 1.86 ± 0.05d | 2.24 ± 0.31c | 2.59 ± 0.23b | 2.86 ± 0.05a | 2.17 ± 0.09c |
Elongation at break (%) | 169.9 ± 8.8d | 205.8 ± 4.1c | 218.6 ± 14.7b | 240.4 ± 7.1a | 232.3 ± 7.9a | 198.3 ± 8.0c |
Formulation Number | Final Recovery Strain (%) | ||||
---|---|---|---|---|---|
1 Cycle | 2 Cycles | 3 Cycles | 4 Cycles | 5 Cycles | |
1 | 8.82 | 8.71 | 8.41 | 8.28 | 7.70 |
6 | 7.07 | 6.65 | 6.48 | 5.82 | 5.38 |
7 | 6.23 | 6.07 | 5.48 | 5.15 | 4.34 |
8 | 5.32 | 4.73 | 4.32 | 4.15 | 4.14 |
9 | 4.48 | 4.40 | 4.07 | 3.57 | 3.62 |
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Xia, W.; Zhu, N.; Hou, R.; Zhong, W.; Chen, M. Preparation and Characterization of Fluorinated Hydrophobic UV-Crosslinkable Thiol-Ene Polyurethane Coatings. Coatings 2017, 7, 117. https://doi.org/10.3390/coatings7080117
Xia W, Zhu N, Hou R, Zhong W, Chen M. Preparation and Characterization of Fluorinated Hydrophobic UV-Crosslinkable Thiol-Ene Polyurethane Coatings. Coatings. 2017; 7(8):117. https://doi.org/10.3390/coatings7080117
Chicago/Turabian StyleXia, Wenjing, Nianqing Zhu, Rongjie Hou, Wengui Zhong, and Mingqing Chen. 2017. "Preparation and Characterization of Fluorinated Hydrophobic UV-Crosslinkable Thiol-Ene Polyurethane Coatings" Coatings 7, no. 8: 117. https://doi.org/10.3390/coatings7080117
APA StyleXia, W., Zhu, N., Hou, R., Zhong, W., & Chen, M. (2017). Preparation and Characterization of Fluorinated Hydrophobic UV-Crosslinkable Thiol-Ene Polyurethane Coatings. Coatings, 7(8), 117. https://doi.org/10.3390/coatings7080117