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Poly[oxymethylene–oligo(oxyethylene)] for use in subambient temperature electrochromic devices
Author(s) -
Colley Robert A,
Budd Peter M,
Owen John R,
Balderson Simon
Publication year - 2000
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/(sici)1097-0126(200004)49:4<371::aid-pi384>3.0.co;2-7
Subject(s) - electrochromism , lithium perchlorate , electrolyte , electrochromic devices , lithium (medication) , iodide , amorphous solid , materials science , atmospheric temperature range , polymer , polymer chemistry , analytical chemistry (journal) , nuclear chemistry , chemistry , inorganic chemistry , electrode , organic chemistry , medicine , physics , meteorology , endocrinology
Polymer electrolytes were prepared from oxymethylene‐linked polyethylene glycol 200 with lithium perchlorate at O:Li mole ratios of 10, 25 and 70, and with zinc iodide at an O:Zn mole ratio of 70. At the higher salt concentrations (O:Li ≤ 25), the electrolytes were amorphous at temperatures down to −20 °C. Conductivity was measured over a range of temperatures (eg for O:Li = 25, σ ranged from 4 × 10 −8 S cm −1 at −10 °C to 2 × 10 −4 S cm −1 at 70 °C). A prototype electrochromic device was constructed for which the progression of a colour front was temperature dependent. Such a device could be utilized as a time‐temperature integrating sensor for indicating whether frozen goods have been stored correctly. © 2000 Society of Chemical Industry