Effect of Polystyrene Synthesis Method on Water Sorption and Glass Transition
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Water Sorption Measurements
2.3. Dynamic Mechanical Analysis
2.4. Thermal Analysis
2.5. Surface Energy Analysis
3. Results
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Supplier/Morphology | Mn kg/mol | PS PDI | PS Volume Fraction (φ) | |
---|---|---|---|---|
PS77k | Polymer Source | 77 | 1.05 | 1 |
PS109k | Versalis | 109 | 2.64 | 1 |
PS160k | Polymer Source | 160 | 1.05 | 1 |
PS387k | In-house | 387 | 1.02 a | 1 |
SEO92k | In-house/Cylindrical (PEO cylinders) | 92 | 1.01 | 0.7 |
SEO122k | In-house/Lamellar (PEO majority) | 122 | 1.02 | 0.46 |
Sample | k (mgwater/gpolymer) | k* (molwater/molchain end) | Chain End Functionality |
---|---|---|---|
PS387k | 2.9 ± 0.1 | 31 | Hydroxyl |
PS77k | 2.1 ± 0.2 | 4 | Alkyl |
PS160k | 1.7 ± 0.2 | 8 | Alkyl |
PS109k (35 °C) | 0.55 ± 0.03 | 2 | Benzoate carbonyl |
PS109k (55 °C) | 0.83 ± 0.03 | 3 | Benzoate carbonyl |
Sample | Tg (5% RH) (°C) | ΔTg,max b (°C) |
---|---|---|
PS77k | 88.3 ± 0.7 | 4.8 ± 0.8 |
PS109k | 97.0 ± 0.7 | 4.6 ± 0.8 |
PS160k_DSC | 95.0 ± 0.7 | 7.3 ± 1.5 |
PS160k_DMA | 92 a | 6.0 |
PS387k | 104.8 ± 0.1 | 3.9 ± 0.9 |
SEO92k | 105.9 ± 0.1 | 2.3 ± 0.3 |
SEO122k | 105.6 ± 0.7 | 3.7 ± 1.0 |
All PS | 5.1 ± 0.5 | |
All Samples | 4.4 ± 0.4 |
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Hallinan, D.T., Jr.; Minelli, M.; Oparaji, O.; Sardano, A.; Iyiola, O.; Garcia, A.R.; Burnett, D.J. Effect of Polystyrene Synthesis Method on Water Sorption and Glass Transition. Membranes 2022, 12, 1059. https://doi.org/10.3390/membranes12111059
Hallinan DT Jr., Minelli M, Oparaji O, Sardano A, Iyiola O, Garcia AR, Burnett DJ. Effect of Polystyrene Synthesis Method on Water Sorption and Glass Transition. Membranes. 2022; 12(11):1059. https://doi.org/10.3390/membranes12111059
Chicago/Turabian StyleHallinan, Daniel T., Jr., Matteo Minelli, Onyekachi Oparaji, Andrea Sardano, Oluwagbenga Iyiola, Armando R. Garcia, and Daniel J. Burnett. 2022. "Effect of Polystyrene Synthesis Method on Water Sorption and Glass Transition" Membranes 12, no. 11: 1059. https://doi.org/10.3390/membranes12111059