Effect of salt concentration on the glass transition temperature and ionic conductivity of poly(ethylene glycol)-polyurethane/LiClO4complexes
β Scribed by Pil-Ho Huh; Myung-Geun Choi; Nam Ju Jo; Jin-Kook Lee; Jang-Oo Lee; Wongkang Yang
- Publisher
- The Polymer Society of Korea
- Year
- 2004
- Tongue
- English
- Weight
- 196 KB
- Volume
- 12
- Category
- Article
- ISSN
- 1598-5032
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π SIMILAR VOLUMES
## Abstract The addition of small amounts of crown ethers was observed to enhance the conductivity of the system PEO~20~LiCF~3~SO~3~ (PEO: poly(ethylene oxide)). Optimum conductivity enhancement was observed for the system PEO~20~LiCF~3~SO~3~(crown ether)~0.003~ when 12βcrownβ4 and benzoβ12βcrownβ4
The glass transition temperature of amorphous and fractionated poly(ethylene terephthalate) has been measured by differential scanning calorimetry. The application of the Fox-Flory equation for the range of molecular weights between 37100 and 4500 gives the values of Tg~ =342.4 K and Kg=51200. The l