Phase relations in ammonium heptamolybdate-poly(vinyl alcohol)-water mixtures / Ostroushko AA,Vilkova NV // RUSSIAN JOURNAL OF INORGANIC CHEMISTRY. - 2001. - V. 46, l. 8. - P. 1240-1243.

ISSN/EISSN:

0036-0236 / нет данных

Type:

Article

Abstract:

Phase relations in ammonium molybdate tetrahydrate-poly(vinyl alcohol)-water mixtures were studied. An isothermal section of the phase diagram for room temperature was obtained. Phase relations for polymer-salt compositions exposed to light or stored in dark are significantly different. In light, homogeneous aqueous solutions of salt and polymer exist over a fairly wide region, forming molecular complexes with partially reduced molybdenum. In polymer-rich compositions, solid solutions in it exist whose concentration extent is wider as the water content increases. Several heterogeneous fields exist in the system where two or three phases coexist: a liquid polymer-salt solution, a solid polymer-salt phase, and ammonium heptamolybdate crystals. A reduction in the water content gives rise to phase inversion in the heterogeneous region: the system changes its state from a liquid dispersion medium to a solid dispersion medium in which liquid drops are contained. Data are obtained allowing the inference to be made that mesomorphic entities, like liquid-crystalline ones, can exist in the system in question, which is related to a novel phenomenon: the induced stiffness of macromolecules of flexible-chain water-soluble polymer due to complexing with inorganic polyanions.

Author keywords:

нет данных

DOI:

нет данных

Web of Science ID:

ISI:000170630400028

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	AUG
Publisher	INTERPERIODICA
Address	PO BOX 1831, BIRMINGHAM, AL 35201-1831 USA
Language	English
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear
Number-of-Cited-References	16
Usage-Count-Since-2013	1
Journal-ISO	Russ. J. Inorg. Chem.
Doc-Delivery-Number	466EB