The solubility of many alkali metal salts shows negative temperature dependence in poly(ethylene oxide) (PEO) oligomer. When a PEO oligomer solution containing salt is heated, salt crystals are phase separated. This unusual phenomenon was analysed systematically for a variety of inorganic salts. These salts were shown to have relatively high lattice energy and are known to form no complex with PEO.
Посилання на статтю:
Relation between unusual solubility of salts in poly(ethylene oxide) oligomers and complex formation / Hiroyuki Ohno* and Kaori Ito // Polymer. – 1993. – Vol 34. – P. 4171-4172.