Acid-Labile Surfactants Based on Poly(ethylene glycol), Carbon Dioxide and Propylene Oxide: Miniemulsion Polymerization and Degradation Studies
Abstract
:1. Introduction
2. Experimental Section
2.1. Materials
2.2. Measurements
2.3. Synthesis of (R,R)-(salcy)-CoOBzF5
2.4. General procedure for the Synthesis of mPEG-b-PPC and PPC-b-PEG-b-PPC
2.5. General Procedure for Free-Radical Direct Miniemulsion Polymerization
2.6. General Procedure for the Destabilization of the PS Nanoparticles
2.7. Degradation Study of the Surfactant
3. Results and Discussion
3.1. Synthesis and Characterization of Polycarbonate-Polyether Surfactants
3.2. Surfactant Properties and Degradation
4. Conclusions
Supplementary Materials
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Sample | Composition a | Mn/g·mol−1 b | Đ b | Mn/g·mol−1 a | CMC/mg·L−1 c | HLB d |
---|---|---|---|---|---|---|
1 | mPEG113-b-PPC10 | 5000 | 1.05 | 6000 | 2 | 16.6 |
2 | mPEG113-b-PPC20 | 5300 | 1.08 | 7000 | 1 | 14.2 |
3 | mPEG113-b-PPC49 | 6500 | 1.09 | 10,000 | 2 | 10.0 |
4 | mPEG45-b-PPC8 | 2500 | 1.04 | 2800 | 9 | 14.2 |
5 | mPEG45-b-PPC10 | 2600 | 1.03 | 3000 | 3 | 13.2 |
6 | mPEG45-b-PPC26 | 3600 | 1.04 | 4600 | 3 | 8.5 |
7 | mPEG45-b-PPC35 | 3900 | 1.08 | 5600 | 14 | 7.1 |
8 | mPEG45-b-PPC47 | 4400 | 1.07 | 6800 | n.s. e | 5.8 |
9 | PPC10-b-PEG45-b-PPC10 | 3300 | 1.06 | 4000 | n.s. e | 9.9 |
10 | PPC25-b-PEG45-b-PPC25 | 4700 | 1.08 | 7100 | n.s. e | 5.6 |
Sample a | Surfactant | wt % PPC of Surfactant c | Particle Size d/nm d | PDI d |
---|---|---|---|---|
NP2 | 2 | 29 | 330 | 0.12 |
NP3 | 3 | 50 | 270 | 0.08 |
NP4 | 4 | 29 | 940 | 0.08 |
NP6 | 6 | 57 | 140–>1000 | 0.57 |
NPL | Lut. AT50 b | 0 | 160 | 0.06 |
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Scharfenberg, M.; Wald, S.; Wurm, F.R.; Frey, H. Acid-Labile Surfactants Based on Poly(ethylene glycol), Carbon Dioxide and Propylene Oxide: Miniemulsion Polymerization and Degradation Studies. Polymers 2017, 9, 422. https://doi.org/10.3390/polym9090422
Scharfenberg M, Wald S, Wurm FR, Frey H. Acid-Labile Surfactants Based on Poly(ethylene glycol), Carbon Dioxide and Propylene Oxide: Miniemulsion Polymerization and Degradation Studies. Polymers. 2017; 9(9):422. https://doi.org/10.3390/polym9090422
Chicago/Turabian StyleScharfenberg, Markus, Sarah Wald, Frederik R. Wurm, and Holger Frey. 2017. "Acid-Labile Surfactants Based on Poly(ethylene glycol), Carbon Dioxide and Propylene Oxide: Miniemulsion Polymerization and Degradation Studies" Polymers 9, no. 9: 422. https://doi.org/10.3390/polym9090422