Synthesis of Poly[(ethylene carbonate)‐co‐(ethylene oxide)] Copolymer by Phosphazene‐Catalyzed ROP |
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| Authors: | Hongjun Yang Manqing Yan Stergios Pispas Guangzhao Zhang |
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| Affiliation: | 1. Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China;2. Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., 11635 Athens, Greece;3. Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China |
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| Abstract: | Poly[(ethylene carbonate)‐co‐(ethylene oxide)] is synthesized by ROP of 1,3‐dioxolan‐2‐one using 1‐tert‐butyl‐4,4,4‐tris(dimethylamino)‐2,2‐bis[tris(dimethylamino)phosphoranylidenamino]‐2Λ5,Λ5‐catenadiphosphazene as the catalyst. NMR spectroscopy shows that the copolymer chain consists of EO‐EC‐EO‐EO sequences. GPC measurements indicate a PDI of 1.43–1.66 and show that the molecular weight increases with monomer conversion. Thermal analysis demonstrates that the copolymer is amorphous with a glass transition temperature of about –42 °C and an onset decomposition temperature of about 200 °C. |
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| Keywords: | ethylene carbonates glass transition temperature ring‐opening polymerization t‐BuP4 |
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