Chemical networks of poly(vinyl alcohol)-Si hybrid films and the thermodynamics of their interaction with water / Suvorova A. I.,Tyukova I. S.,Suvorov A. L.,Sobenina M. E. // POLYMER SCIENCE SERIES A. - 2015. - V. 57, l. 3. - P. 315-320.

ISSN/EISSN:

0965-545X / 1555-6107

Type:

Article

Abstract:

Organic-inorganic hybrid polymer films are prepared through the sol-gel method via the hydrolytic condensation of tetraethoxysilane in a 4\% aqueous solution of poly(vinyl alcohol). The films are polymer networks containing O-Si-O bonds between chains formed via the interaction of OH groups of alcohol and Si-OH groups of the products of hydrolysis of tetraethoxysilane. The films contain 10.8-26.2 wt \% Si in the polymer matrix. Isotherms of water-vapor sorption by the films are determined and used to calculate the molecular mass of polymer-chain fragments between crosslink-junction points in terms of the Flory-Rehner theory. For hybrid polymer networks, the products of sol-gel synthesis, this calculation is performed for the first time. The molecular mass of chain fragments between crosslink-junction points decreases from 9000 to 180 with an increase in the content of Si in the films. Poly(vinyl alcohol)-Si hybrid films are active during the separation of components of organic-aqueous media (a solution of tetrahydrofuran in water). The selectivity of the films increases as the molecular mass of chain fragments between crosslink-junction points decreases, that is, as the density of the chemical network increases.

Author keywords:

ORGANIC-INORGANIC MATERIALS; AQUEOUS-SOLUTION; MEMBRANES; PERVAPORATION; TETRAETHOXYSILANE; DEHYDRATION; TECHNOLOGY; SEPARATION; REMOVAL; ETHANOL

DOI:

10.1134/S0965545X15030153

Web of Science ID:

ISI:000355227600010

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAY
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1555-6107
Keywords-Plus	ORGANIC-INORGANIC MATERIALS; AQUEOUS-SOLUTION; MEMBRANES; PERVAPORATION; TETRAETHOXYSILANE; DEHYDRATION; TECHNOLOGY; SEPARATION; REMOVAL; ETHANOL
Research-Areas	Polymer Science
Web-of-Science-Categories	Polymer Science
Author-Email	anna.suvorova7@gmail.com
Number-of-Cited-References	35
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	10
Journal-ISO	Polym. Sci. Ser. A
Doc-Delivery-Number	CJ1FJ