Cationic and Anionic Effects on the Glass Transition Temperature for Aqueous Electrolyte Solutions |
| |
Authors: | Y Yoshimura A Ohnishi H Kanno |
| |
Affiliation: | (1) Department of Chemistry, National Defense Academy, 1-10-20 Hashirimizu, Yokosuka, Kanagawa, 239-8686, Japan |
| |
Abstract: | Glass-forming composition regions of aqueous CH3COOM (M = Li, Na, K, Rb, Cs, and Tl), CF3COOM (M = Li, Na, K, Rb, and Cs), and Et4NX (Et4 = C2H5, X = OH, CH3COO, Cl, Br, NO3, and SCN) solutions are reported as a function of water concentration R (R = moles of water per moles of salt). Glass transition temperatures (T
g) were measured by a simple differential thermal analysis (DTA) method with a cooling rate of about 600 K-min–1. The T
g of all solutions decrease with increasing R (decreasing salt concentration). It is found that T
g at the same R value decrease in the order Na+ > Li+ > K+ > Rb+ > Cs+ in all glass-forming composition regions of the alkali acetate salt and alkali trifluoroacetate salt solutions. T
g for Et4NX solutions decrease in the order CH3COO– ~OH– > Cl– > Br– > NO
3
–
> SCN–. The effects of the cation and anion on the glass-forming behavior in these aqueous solutions are discussed. |
| |
Keywords: | Alkali metal acetate alkali metal trifluoroacetate Et4NX solution glass-forming composition region glass transition temperature cationic effect anionic effect |
本文献已被 SpringerLink 等数据库收录! |
|