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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of solution chemistry 28 (1999), S. 1127-1136 
    ISSN: 1572-8927
    Keywords: Alkali metal acetate ; alkali metal trifluoroacetate ; Et4NX solution ; glass-forming composition region ; glass transition temperature ; cationic effect ; anionic effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: 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.
    Type of Medium: Electronic Resource
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