The Effect of Block Ratio and Structure on the Thermosensitivity of Double and Triple Betaine Block Copolymers
Abstract
:1. Introduction
2. Results and Discussions
2.1. The Preparation of PGLBT-b-PSPE with Controlled Block Ratios
2.2. The Influence of Block Ratio on the Solution Behavior of PGLBT-b-PSPE
Cloud Point (°C) | Rh (Unimers) (nm) | Rh (Micelles) (nm) | PDI b(Micelles) | Rg (Micelles) (nm) | Rg/Rh | |
---|---|---|---|---|---|---|
GLBT149-b-SPE161 | - | 4.7 | - | - | - | - |
GLBT100-b-SPE245 | - | 4.6 | 28.3 | 0.12 | 41.7 | 1.47 |
GLBT74-b-SPE277 | ~5 | 3.8 | 33.4 | 0.13 | 28.1 | 0.84 |
GLBT49-b-SPE229 | 19.4 | 4.2 | (phase separation) | - | - | - |
GLBT297-b-SPE330 | - | 6.0 | 31.2 | 0.26 | 53.4 | 1.45 |
GLBT198-b-SPE811 | 8.4 | 4.5 | 40.2 | 0.15 | 33.9 a | 0.71 a |
GLBT149-b-SPE742 | 14.7 | 4.6 | 44.2 | 0.11 | 40.2 a | 0.78 a |
GLBT99-b-SPE630 | 18.7 | 3.5 | 60.9 | 0.16 | 60.4 | 0.99 |
2.3. The Solution Behavior of the BAB Triblock PSPE-b-PGLBT-b-PSPE
Cloud Point (°C) | Rh (Unimer) (nm) | Rh (Micelles) (nm) | PDI b (Micelles) | Rg (Micelles) (nm) | Rg/Rh | |
---|---|---|---|---|---|---|
SPE248-GLBT99-SPE277 | 42.8 | 8.31 | 43 | 0.14 | 57.6 a | 0.87 a |
SPE198-GLBT198-SPE212 | 12.5 | 5.20 | - | - | - | - |
3. Experimental Section
3.1. Materials
3.2. The Synthesis of PGLBT-b-PSPE via One-Pot RAFT Polymerization
3.3. Polymer Characterization
- 1H NMR spectroscopy
- Size exclusion chromatography (SEC)
- Turbidimetry
- Light scattering
- Transmission electron microscopy (TEM)
3.4. The Determination of Monomer Conversion and Theoretical Molecular Weight
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Mntheo (g/mol) | MnSEC (g/mol) | Đ (Mw/Mn) | |
---|---|---|---|
GLBT149-b-SPE161 | 77,400 | 36,400 | 1.12 |
GLBT100-b-SPE245 | 90,300 | 43,800 | 1.17 |
GLBT74-b-SPE277 | 93,600 | 45,100 | 1.14 |
GLBT49-b-SPE229 | 74,900 | 41,700 | 1.15 |
GLBT297-b-SPE330 | 156,400 | 71,300 | 1.20 |
GLBT198-b-SPE811 | 269,500 | 89,100 | 1.18 |
GLBT149-b-SPE742 | 239,700 | 88,300 | 1.21 |
GLBT99-b-SPE630 | 197,600 | 66,500 | 1.16 |
Mntheo (g/mol) | MnSEC (g/mol) | Đ (Mw/Mn) | |
---|---|---|---|
SPE248-GLBT99-SPE277 | 168,300 | 66,300 | 1.20 |
SPE198-GLBT198-SPE212 | 157,500 | 64,500 | 1.13 |
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Lim, J.; Matsuoka, H.; Kinoshita, Y.; Yusa, S.-i.; Saruwatari, Y. The Effect of Block Ratio and Structure on the Thermosensitivity of Double and Triple Betaine Block Copolymers. Molecules 2024, 29, 390. https://doi.org/10.3390/molecules29020390
Lim J, Matsuoka H, Kinoshita Y, Yusa S-i, Saruwatari Y. The Effect of Block Ratio and Structure on the Thermosensitivity of Double and Triple Betaine Block Copolymers. Molecules. 2024; 29(2):390. https://doi.org/10.3390/molecules29020390
Chicago/Turabian StyleLim, Jongmin, Hideki Matsuoka, Yusuke Kinoshita, Shin-ichi Yusa, and Yoshiyuki Saruwatari. 2024. "The Effect of Block Ratio and Structure on the Thermosensitivity of Double and Triple Betaine Block Copolymers" Molecules 29, no. 2: 390. https://doi.org/10.3390/molecules29020390