Anionic Polymerization of Styrene and 1,3-Butadiene in the Presence of Phosphazene Superbases
Abstract
:1. Introduction
2. Materials and Methods
2.1. Chemicals
2.2. Instrumentation
2.3. Homopolymerization of Styrene and 1,3-Butadiene in the Presence of Phosphazene Bases (t-BuP4, t-BuP2, t-BuP1)
3. Results and Discussion
4. Conclusions
Supplementary Materials
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Entry | Monomer | Phosphazene Base (PB) | PB/sec-BuLi a | Time (h) | Conv. b (%) | Mn Targeted c (g/mol) | Mn SEC d (g/mol) | Ð d |
---|---|---|---|---|---|---|---|---|
1 | Styrene | t-BuP4 | 1:1 | 0.3 | 71.4 | 25,000 | 297,000 | 1.9 |
2 | Styrene | t-BuP2 | 1:1 | 2 | 100 | 25,000 | 72,000 | 1.19 |
3 | Styrene | t-BuP2 | 0.5:1 | 4 | 100 | 25,000 | 55,000 | 1.16 |
4 | Styrene | t-BuP1 | 1:1 | 4 | 100 | 15,000 | 16,500 | 1.04 |
5 | Styrene | t-BuP1 | 0.5:1 | 6 | 100 | 15,000 | 17,500 | 1.03 |
6 | Styrene | -- | -- | 6 | 100 | 15,000 | 15,800 | 1.02 |
7 | Butadiene | t-BuP2 | 1:1 | 8 | 100 | 15,000 | 51,000 | 1.17 |
8 | Butadiene | t-BuP1 | 1:1 | 12 | 100 | 8000 | 9300 | 1.03 |
9 | Butadiene | -- | -- | 16 | 100 | 10,000 | 11,300 | 1.02 |
Entry | Macro-Initiator a | Monomer | Phosphazene Base (PB) | PB/Sec-BuLi b | Time (h) | Conv. c (%) | Mn SEC d (g/mol) | Ð d |
---|---|---|---|---|---|---|---|---|
1 | (PS−Li+)72k | LLA | t-BuP2 | 1:1 | 16 | -- | 72,000 | 1.20 |
2 | (PS−Li+)72k | ε-CL | t-BuP2 | 1:1 | 16 | -- | 72,000 | 1.20 |
3 | (PS−Li+)16.5k | LLA | t-BuP1 | 1:1 | 16 | -- | 16,500 | 1.04 |
4 | (PS−Li+)16.5k | ε-CL | t-BuP1 | 1:1 | 16 | -- | 16,500 | 1.04 |
5 | (PSO−Li+)72k | LLA | t-BuP2 | 1:1 | 0.3 | 100 | 87,000 | 1.22 |
6 | (PSO−Li+)72k | ε-CL | t-BuP2 | 1:1 | 17 | 70 | 82,000 | 1.23 |
7 | (PSO−Li+)16.5k | LLA | t-BuP1 | 1:1 | 50 | 75 | 28,000 | 1.07 |
8 | (PSO−Li+)16.5k | ε-CL | t-BuP1 | 1:1 | 70 | 25 | 20,000 | 1.15 |
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Ntetsikas, K.; Alzahrany, Y.; Polymeropoulos, G.; Bilalis, P.; Gnanou, Y.; Hadjichristidis, N. Anionic Polymerization of Styrene and 1,3-Butadiene in the Presence of Phosphazene Superbases. Polymers 2017, 9, 538. https://doi.org/10.3390/polym9100538
Ntetsikas K, Alzahrany Y, Polymeropoulos G, Bilalis P, Gnanou Y, Hadjichristidis N. Anionic Polymerization of Styrene and 1,3-Butadiene in the Presence of Phosphazene Superbases. Polymers. 2017; 9(10):538. https://doi.org/10.3390/polym9100538
Chicago/Turabian StyleNtetsikas, Konstantinos, Yahya Alzahrany, George Polymeropoulos, Panayiotis Bilalis, Yves Gnanou, and Nikos Hadjichristidis. 2017. "Anionic Polymerization of Styrene and 1,3-Butadiene in the Presence of Phosphazene Superbases" Polymers 9, no. 10: 538. https://doi.org/10.3390/polym9100538
APA StyleNtetsikas, K., Alzahrany, Y., Polymeropoulos, G., Bilalis, P., Gnanou, Y., & Hadjichristidis, N. (2017). Anionic Polymerization of Styrene and 1,3-Butadiene in the Presence of Phosphazene Superbases. Polymers, 9(10), 538. https://doi.org/10.3390/polym9100538