NDLI: Crystallization of poly(vinylidene fluoride)-SiO$_{2}$ hybrid composites prepared by a Sol-gel process

Content Provider	Springer Nature Link
Author	Cho, Jae Whan Sul, Kyung Il
Copyright Year	2001
Abstract	Organic-inorganic hybrid composites consisting of poly(vinylidene fluoride) (PVDF) and SiO$_{2}$ were prepared through a sol-gel process and the crystallization behavior of PVDF in the presence of SiO$_{2}$ 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 SiO$_{2}$ 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 SiO$_{2}$ networks. That is, SiO$_{2}$ content directly influenced preference and disturbance for crystallization. In polymer-rich hybrids, SiO$_{2}$ 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% SiO$_{2}$ and was higher than that of pure PVDF. However, beyond about 10 wt% SiO$_{2}$, the crystallization of PVDF was strongly confined.
Starting Page	135
Ending Page	140
Page Count	6
File Format	PDF
ISSN	12299197
Journal	Fibers and Polymers
Volume Number	2
Issue Number	3
e-ISSN	18750052
Language	English
Publisher	The Korean Fiber Society
Publisher Date	2001-01-01
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Poly(vinylidene fluoride) Organic-inorganic hybrids Crystallization SiO$_{2}$ networks Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering Polymers and Plastics

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