Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Crystallization of poly(vinylidene fluoride)-SiO2 hybrid composites prepared by a Sol-gel process

Crystallization of poly(vinylidene fluoride)-SiO2 hybrid composites prepared by a Sol-gel process Organic-inorganic hybrid composites consisting of poly(vinylidene fluoride) (PVDF) and SiO2 were prepared through a sol-gel process and the crystallization behavior of PVDF in the presence of SiO2 networks was investigated by spectroscopic, thermal and x-ray diffraction measurements. The hybrid composites obtained were relatively transparent, and brittleness increased with increasing content of tetraethoxysilane (TEOS). It was regarded from FT-IR and DSC thermal analyses that at least a certain interaction existed between PVDF molecules and the SiO2 networks. X-ray diffraction measurements showed that all of the hybrid samples had a crystal structure of PVDFγ-phase. Fresh gel prepared from the sol-gel reaction showed a very weak x-ray diffraction peak near 2θ=21° due to PVDF crystallization, and intensity increased gradually with time after gelation. The crystallization behavior of PVDF was strongly affected by the amount of SiO2 networks. That is, SiO2 content directly influenced preference and disturbance for crystallization. In polymer-rich hybrids, SiO2 networks had a favorable effect on the extent of PVDF crystallization. In particular, the maximum percent crystallinity of PVDF occurred at the content of 3.7 wt% SiO2 and was higher than that of pure PVDF. However, beyond about 10 wt% SiO2, the crystallization of PVDF was strongly confined. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Fibers and Polymers Springer Journals

Crystallization of poly(vinylidene fluoride)-SiO2 hybrid composites prepared by a Sol-gel process

Fibers and Polymers , Volume 2 (3): 6 – Sep 1, 2001

Loading next page...
 
/lp/springer-journals/crystallization-of-poly-vinylidene-fluoride-sio-2-hybrid-composites-vNEF0JaWjb

References (20)

Publisher
Springer Journals
Copyright
Copyright © The Korean Fiber Society 2001
ISSN
1229-9197
eISSN
1875-0052
DOI
10.1007/bf02875326
Publisher site
See Article on Publisher Site

Abstract

Organic-inorganic hybrid composites consisting of poly(vinylidene fluoride) (PVDF) and SiO2 were prepared through a sol-gel process and the crystallization behavior of PVDF in the presence of SiO2 networks was investigated by spectroscopic, thermal and x-ray diffraction measurements. The hybrid composites obtained were relatively transparent, and brittleness increased with increasing content of tetraethoxysilane (TEOS). It was regarded from FT-IR and DSC thermal analyses that at least a certain interaction existed between PVDF molecules and the SiO2 networks. X-ray diffraction measurements showed that all of the hybrid samples had a crystal structure of PVDFγ-phase. Fresh gel prepared from the sol-gel reaction showed a very weak x-ray diffraction peak near 2θ=21° due to PVDF crystallization, and intensity increased gradually with time after gelation. The crystallization behavior of PVDF was strongly affected by the amount of SiO2 networks. That is, SiO2 content directly influenced preference and disturbance for crystallization. In polymer-rich hybrids, SiO2 networks had a favorable effect on the extent of PVDF crystallization. In particular, the maximum percent crystallinity of PVDF occurred at the content of 3.7 wt% SiO2 and was higher than that of pure PVDF. However, beyond about 10 wt% SiO2, the crystallization of PVDF was strongly confined.

Journal

Fibers and PolymersSpringer Journals

Published: Sep 1, 2001

Keywords: Poly(vinylidene fluoride); Organic-inorganic hybrids; Crystallization; SiO2 networks

There are no references for this article.