Large Improvement in the Mechanical Properties of Polyurethane Nanocomposites Based on a Highly Concentrated Graphite Nanoplate/Polyol Masterbatch
Abstract
:1. Introduction
2. Experimental
2.1. Materials
2.2. Preparation of Graphite Nanoplates (GNPs)
2.3. Preparation of GNP/Polyol Masterbatch
2.4. Polymerization of Polyurethane (PU)/GNP Nanocomposites
2.5. Characterization
3. Results and Discussion
3.1. Characterization of GNPs
3.2. Preparation of GNP/Polyol Masterbatch
3.3. Lyotropic Liquid Crystalline (LLC) Behavior of GNPs in Polyol
3.4. PU/GNP Nanocomposites
3.4.1. LLC Behavior of GNPs in PU Nanocomposites
3.4.2. Degree of Hydrogen Bonding and Microphase Separation of Nanocomposites
3.4.3. Mechanical Properties of GNP/PU Nanocomposites
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Conflicts of Interest
References
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Sample Code | Composition (wt%) | |||
---|---|---|---|---|
MDI | Polyol | BD | GNP | |
PU-0 | 31.47 | 62.87 | 5.66 | 0 |
PU-0.05 | 31.45 | 62.84 | 5.66 | 0.05 |
PU-0.1 | 31.43 | 62.81 | 5.66 | 0.10 |
PU-0.2 | 31.40 | 62.74 | 5.65 | 0.20 |
PU-0.5 | 31.31 | 62.56 | 5.64 | 0.50 |
Sample | Raman Characterization | |
---|---|---|
ID/IG | 2D Band (cm−1) | |
NG | 0.1 | 2677 |
GO | 1.2 | NA |
GNP | 0.6 | 2649 |
Sample Code | FTIR Spectroscopy | DSC | ||||
---|---|---|---|---|---|---|
R* | DPS (%) | Tg-s (°C) | Tm-h (°C) | ΔHm-h (J/g) | Tc (°C) | |
PU-0 | 1.23 | 55.1 | −47 | 169 | 4.05 | 36 |
PU-0.05 | 1.08 | 51.9 | −52 | 153 | 5.57 | 61 |
PU-0.1 | 1.25 | 55.5 | −48 | 168 | 4.02 | 38 |
PU-0.2 | 1.01 | 50.2 | −50 | 158 | 4.77 | 50 |
PU-0.5 | 1.03 | 50.7 | −50 | 154 | 4.85 | 50 |
Sample Code | Young’s Modulus (MPa) | Tensile Strength (MPa) | Elongation at Break (%) |
---|---|---|---|
U-0 | 4.2 ± 0.25 | 33.1 ± 1.49 | 570 ± 17.82 |
PU-0.05 | 7.5 ± 0.23 | 35.6 ± 1.23 | 740 ± 12.51 |
PU-0.1 | 10.6 ± 0.34 | 67.2 ± 1.21 | 470 ± 18.52 |
PU-0.2 | 7.3 ± 0.28 | 44.8 ± 1.42 | 640 ± 20.24 |
PU-0.5 | 8.7 ± 0.52 | 36.5 ± 0.82 | 560 ± 25.07 |
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Lee, S.-H.; Oh, C.-R.; Lee, D.-S. Large Improvement in the Mechanical Properties of Polyurethane Nanocomposites Based on a Highly Concentrated Graphite Nanoplate/Polyol Masterbatch. Nanomaterials 2019, 9, 389. https://doi.org/10.3390/nano9030389
Lee S-H, Oh C-R, Lee D-S. Large Improvement in the Mechanical Properties of Polyurethane Nanocomposites Based on a Highly Concentrated Graphite Nanoplate/Polyol Masterbatch. Nanomaterials. 2019; 9(3):389. https://doi.org/10.3390/nano9030389
Chicago/Turabian StyleLee, Sang-Hyub, Cho-Rong Oh, and Dai-Soo Lee. 2019. "Large Improvement in the Mechanical Properties of Polyurethane Nanocomposites Based on a Highly Concentrated Graphite Nanoplate/Polyol Masterbatch" Nanomaterials 9, no. 3: 389. https://doi.org/10.3390/nano9030389