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Composite polymer electrolytes based on the low crosslinked copolymer of linear and hyperbranched polyurethanes
Author(s) -
Hong Ling,
Shi Liyi
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.26064
Subject(s) - materials science , copolymer , electrolyte , ionic conductivity , polyurethane , polymer , polymer chemistry , lithium perchlorate , lithium (medication) , fourier transform infrared spectroscopy , ionic bonding , composite number , chemical engineering , composite material , chemistry , organic chemistry , ion , medicine , electrode , engineering , endocrinology
Low crosslinked copolymer of linear and hyperbranched polyurethane (CHPU) was prepared, and the ionic conductivities and thermal properties of the composite polymer electrolytes composed of CHPU and LiClO 4 were investigated. The FTIR and Raman spectra analysis indicated that the polyurethane copolymer could dissolve more lithium salt than the corresponding polymer electrolytes of the non crosslinked hyperbranched polyurethane, and showed higher conductivities. At salt concentration EO/Li = 4, the electrolyte CHPU30‐LiClO 4 reached its maximum conductivity, 1.51 × 10 −5 S cm −1 at 25°C. DSC measurement was also used for the analysis of the thermal properties of polymer electrolytes. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 3607–3613, 2007