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Study of ion solvation and ion association in polymer gel electrolyte with polyethylene oxide‐ co ‐polypropylene oxide as a plasticizer
Author(s) -
Sun Xiao Guang,
Li Bin,
Lin Yun Qing,
Jing Xiabin
Publication year - 1996
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1996.210410312
Subject(s) - plasticizer , solvation , electrolyte , materials science , oxide , ethylene oxide , ion , molality , propylene oxide , polymer , inorganic chemistry , polymer chemistry , chemistry , organic chemistry , composite material , electrode , copolymer , aqueous solution , metallurgy
Using a molal conductance method, ion solvation and ion association in polytriethylene glycol dimethacrylate (PTREGD)–LiClO 4 gel electrolytes with amorphous ethylene oxide‐ co ‐propylene oxide (EO‐ co ‐PO, M̄ n = 1750) as the plasticizer were investigated. It was found that the fraction of solute existing as single ions (α i ) and ion pairs (α p ) decreases, while that of triple ions (α t ) increases linearly with increasing salt concentration. The dependence of these fractions on molecular weight of plasticizer was also examined. It was shown that α i and α t increase and α p decreases with increasing molecular weight. The result of temperature dependence of these fractions was very interesting: when the temperature is lower than 55°C, α i increases while α p and α t decrease with increasing temperature; however, when the temperature is higher than 55°C, the reverse is true.