Yang Hongjun, Manqing Yan, S. Pispas
Dec 1, 2011
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0
Influential Citations
31
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Journal
Macromolecular Chemistry and Physics
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.