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Phase-Separation Prevention and Performance Improvement of Poly(vinyl acetate)/TEOS Hybrid Using Modified

Cited 29 time in Web of Science Cited 31 time in Scopus
Authors
JANG, JYONGSIK; BAE, JOONWON; KANG, DOOHWAN
Issue Date
2001
Publisher
Wiley-Blackwell
Citation
Journal of Applied Polymer Science 2001, 82, 2310–2318
Keywords
poly(vinyl acetate)phase-separation preventionsilane coupling agentsmodified sol-gel process
Abstract
The formation of covalent bonds between silanols in copolymer and those in
silica prevents organic–inorganic phase separation. Two series of hybrid composite
materials, poly(vinyl acetate-co-vinyl trimethoxysilane)/TEOS and poly[vinyl acetateco-
3-(trimethoxysilyl)propyl methacrylate]/TEOS, were fabricated using a modified solgel
process. The hybrids were transparent. Two kinds of silane coupling agents, vinyl
trimethoxysilane (VTS) and 3-(trimethoxysilyl)propyl methacrylate (g-MPS), were used
to prevent macrophase separation through formation of covalent bonds. Thermal analysis
showed that g-MPS was more effective than VTS for the formation of covalent
bonds. Enhancement of thermal stability of the hybrids was investigated by thermogravimetric
analysis. Photomicrographs of scanning electron microscopy and images of
atomic force microscopy indicated that inorganic silica particles were homogeneously
dispersed in less than 50 nmin organic matrix. The morphological properties of hybrids
were strongly dependent on the organic–inorganic composition.
ISSN
0021-8995
Language
English
URI
http://hdl.handle.net/10371/49102
DOI
https://doi.org/10.1002/app.2079
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