Preparation and characterization of poly(vinyl chloride) calcium phosphate nanocomposites

Calcium phosphate [Ca3(PO4)2] was synthesized by in situ deposition technique and its nano-size (47-97nm) was confirmed by Transmission Electron Microscopy (TEM). Composites of the filler Ca3(PO4)2 (micro and nano) and the matrix poly(vinyl chloride) (PVC) were prepared with different filler loading...

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Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2010-04, Vol.168 (1-3), p.231-236
Main Authors: Patil, Chetan B, Shisode, Priyanka S, Kapadi, Uday R, Hundiwale, Dilip G, Mahulikar, Pramod P
Format: Article
Language:English
Subjects:
Calcium phosphate
Chlorides
Dynamic mechanical properties
Fillers
Nanocomposites
Nanomaterials
Nanostructure
Polyvinyl chlorides
Scanning electron microscopy
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Summary:Calcium phosphate [Ca3(PO4)2] was synthesized by in situ deposition technique and its nano-size (47-97nm) was confirmed by Transmission Electron Microscopy (TEM). Composites of the filler Ca3(PO4)2 (micro and nano) and the matrix poly(vinyl chloride) (PVC) were prepared with different filler loadings (0-5wt.%) by melt intercalation. The Brabender torque rheometer equipped with an internal mixer was used for the preparation of composites of different formulations. The effect of nano- and micro-Ca3(PO4)2 content on the structure and properties of composites was studied. The nanostructures were studied by wide angle X-ray diffraction (WAXD) and scanning electron microscopy (SEM). The mechanical, thermal and dynamic mechanical properties of PVC/micro- and nano-Ca3(PO4)2 composites were characterized using Universal Testing Machine (UTM), Thermo Gravimetric Analyzer (TGA) and dynamic mechanical analyzer (DMA). The thermal analysis results showed that the first thermal degradation onset (T onset) of PVC/nano-Ca3(PO4)2 composites was lower as compared with corresponding microcomposites and higher than that of pristine PVC. However, the tensile strength was found to be maximum at 1% of nano-Ca3(PO4)2 and again decreased with increasing loading of nano-Ca3(PO4)2. Further storage modulus of PVC/micro- and nano-Ca3(PO4)2 composites was decreased with increasing loading while the glass transition temperature increased marginally.
ISSN:0921-5107
DOI:10.1016/j.mseb.2009.12.034