Colorless and Transparent Copolyimides and Their Nanocomposites: Thermo-Optical Properties, Morphologies, and Gas Permeabilities
Abstract
:1. Introduction
2. Experimental
2.1. Materials
2.2. Preparation of the Co-PI Films
2.3. Preparation of the Co-PI Hybrid Films
2.4. Characterization of the Co-PIs
3. Results and Discussion
3.1. Thermal Properties of the Co-PIs
3.2. Co-PI Gas Permeabilities
3.3. Optical Transparencies of the Co-PIs
3.4. Dispersibilities of the Co-PI Hybrids
3.5. Morphologies of the Co-PI Hybrids
3.6. Thermal Behavior of the Co-PI Hybrids
3.7. Gas Permeabilities of the Co-PI Hybrids
3.8. Optical Transparencies of the Hybrids
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Co-PI | BPA (n + m mol) | TFB (n mol) | p-XDA (m mol) | Molar Ratio |
---|---|---|---|---|
A | 1.0 | 1.0 | 0 | 1:1:0 |
B | 1.0 | 0.8 | 0.2 | 1:0.8:0.2 |
C | 1.0 | 0.6 | 0.4 | 1:0.6:0.4 |
D | 1.0 | 0.4 | 0.6 | 1:0.4:0.6 |
E | 1.0 | 0.2 | 0.8 | 1:0.2:0.8 |
F | 1.0 | 0 | 1.0 | 1:0:1 |
Co-PI | Temp., °C/Time, h/Pressure, Torr |
---|---|
PAA | 0/1/760 → 25/17/760 |
PAA hybrid | 25/2/760 → 50/1/760 |
Co-PI hybrid | 80/0.5/1 → 100/0.5/1 → 130/0.5/1 → 160/0.5/1 → 190/0.5/760 → 220/0.5/760 → 250/0.5/760 |
Co-PI | Tg (°C) | TDia (°C) | wtR600b (%) | CTE c (ppm/°C) | O2TR d (cc/m2/day) |
---|---|---|---|---|---|
A | 257 | 552 | 96 | 20 | 2313 |
B | 245 | 530 | 89 | 26 | 1570 |
C | 242 | 503 | 80 | 41 | 888 |
D | 234 | 502 | 75 | 44 | 434 |
E | 234 | 500 | 63 | 53 | 223 |
F | 228 | 481 | 45 | 57 | 98 |
Co-PI | Thickness (µm) | λ0a (nm) | 500nmtranse (%) | YI b |
---|---|---|---|---|
A | 54 | 391 | 87 | 4.61 |
B | 56 | 391 | 86 | 4.19 |
C | 57 | 389 | 86 | 3.40 |
D | 54 | 384 | 86 | 3.32 |
E | 55 | 378 | 86 | 2.93 |
F | 56 | 367 | 87 | 1.97 |
STN in PI (wt %) | Tg (°C) | TDia (°C) | CTE b (ppm/°C) | O2TR c (cc/m2/day) | Pc/Ppd |
---|---|---|---|---|---|
0 (pure PI) | 234 | 500 | 53 | 223 | 1.0 |
5 | 236 | 424 | 49 | 119 | 0.53 |
10 | 239 | 399 | 45 | 90 | 0.40 |
20 | 241 | 379 | 23 | 56 | 0.12 |
40 | 243 | 359 | 17 | <10−2 | - |
50 | 245 | 352 | 14 | 10 | 0.04 |
STN in PI (wt %) | Thickness (µm) | λ0a (nm) | 500nmtranse (%) | YI b |
---|---|---|---|---|
0 (pure PI) | 55 | 378 | 86 | 2.93 |
5 | 57 | 380 | 84 | 4.77 |
10 | 56 | 381 | 82 | 5.53 |
20 | 57 | 381 | 81 | 9.91 |
40 | 56 | 383 | 74 | 15.09 |
50 | 55 | 383 | 74 | 19.26 |
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Shin, H.I.; Kwark, Y.-J.; Chang, J.-H. Colorless and Transparent Copolyimides and Their Nanocomposites: Thermo-Optical Properties, Morphologies, and Gas Permeabilities. Polymers 2019, 11, 585. https://doi.org/10.3390/polym11040585
Shin HI, Kwark Y-J, Chang J-H. Colorless and Transparent Copolyimides and Their Nanocomposites: Thermo-Optical Properties, Morphologies, and Gas Permeabilities. Polymers. 2019; 11(4):585. https://doi.org/10.3390/polym11040585
Chicago/Turabian StyleShin, Hyeon Il, Young-Je Kwark, and Jin-Hae Chang. 2019. "Colorless and Transparent Copolyimides and Their Nanocomposites: Thermo-Optical Properties, Morphologies, and Gas Permeabilities" Polymers 11, no. 4: 585. https://doi.org/10.3390/polym11040585