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Title
SYNTHESIS OF POLY(VINYL ALCOHOL) SILICA-GEL POLYMER HYBRIDS BY IN-SITU HYDROLYSIS METHOD
Author:
TAMAKI R; CHUJO Y;
Addresses:
KYOTO UNIV,GRAD SCH ENGN,DEPT POLYMER CHEM,SAKYO KU KYOTO 6068501 JAPAN KYOTO UNIV,GRAD SCH ENGN,DEPT POLYMER CHEM,SAKYO KU KYOTO 6068501 JAPAN
Heading Title:
Applied organometallic chemistry
issue: 10-11, volume: 12, year: 1998,
pages: 755 - 762
SICI:
0268-2605(1998)12:10-11<755:SOPASP>2.0.ZU;2-R
Source:
ISI
Language:
ENG
Subject:
ORGANIC-INORGANIC MATERIALS; CHANNEL WAVE-GUIDES; OPTICAL-PROPERTIES; MEMBRANES; FILLERS; TETRAETHOXYSILANE; POLYCERAMS; ELASTOMER; COMPOSITE; INSITU;
Keywords:
POLY(VINYL ALCOHOL) (PVA); SOL-GEL; POLYMER HYBRID;
Document Type:
Article
Nature:
Serial
Edition:
Science Citation Index Expanded
Science Citation Index Expanded
Citations:
50
Reviewed:
Addresses for extracts:
Citation:
R. Tamaki and Y. Chujo, "SYNTHESIS OF POLY(VINYL ALCOHOL) SILICA-GEL POLYMER HYBRIDS BY IN-SITU HYDROLYSIS METHOD", Applied organometallic chemistry, 12(10-11), 1998, pp. 755-762

Abstract

Homogeneous poly(vinyl alcohol) (PVA)-silica gel polymer hybrids wereprepared by in-situ hydrolysis of poly(vinyl acetate) (PVAc) in a sol-gel reaction mixture with tetramethoxysilane (TMOS). The degree of hydrolysis was evaluated by FTIR and C-13 CP/MAS NMR; it increased with an increase in the acid catalyst and reached 85% with 1.6 mi of 0.1 M HCl, The homogeneity of the polymer hybrids obtained was maintained when the reaction was performed at 60 degrees C. However, the polymer hybrid became turbid with an increase of the amount of catalyst present when the reaction was conducted at room temperature. The homogeneity of the polymer hybrids obtained was evaluated by nitrogen sorption porosimetry of a porous silica that was obtained by charring the PVA hybrid. The results confirmed the molecular-level dispersion of the PVA in the hybrid. (C) 1998 John Wiley & Sons, Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Bologna University, Review Catalogue
Document created on 19/08/19 at 23:38:15