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Synthesis and characterization of novel saponified guar‐graft‐poly(acrylonitrile)/silica nanocomposite materials
Author(s) -
Singh Vandana,
Tiwari Ashutosh,
Pandey Sadanand,
Singh Somit K.,
Sanghi Rashmi
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.25585
Subject(s) - materials science , silanol , nanocomposite , curing (chemistry) , acrylonitrile , chemical engineering , saponification , fourier transform infrared spectroscopy , ceramic , guar gum , composite material , thermal stability , polymer chemistry , polymer , organic chemistry , copolymer , chemistry , catalysis , biochemistry , engineering
The combination of carbohydrates with silicon‐based ceramic materials offers attractive means of production for high performance materials. Present article describes the synthesis of novel nanocomposites out of SiO 2 and saponified guar‐graft‐poly(acrylonitrile) (SG). Tetraethoxysilane was used as the precursor for silica and growth of SiO 2 phase was allowed concurrently in the presence of SG. The material so obtained was thermally treated at 80°C, 160°C, 500°C, and 900°C to study the effect of thermal curing on its properties. During the curing process, silanol surface groups of silica globules reacted to create the reinforced SiO 2 ‐SG substance. It was observed that at 900°C, the SiO 2 phase crystallized out in tetragonal shape (similar to Cristobalite form of silica) in presence of SG. The chemical, structural and textural characteristics of the composites were determined by FTIR, XRD, TGA‐DTA, SEM and BET studies. The materials were also evaluated as efficient Zn 2+ metal binder. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 536–544, 2007