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http://dx.doi.org/10.7317/pk.2013.37.4.494

Rheological Properties and Foaming Behaviors of Modified PP/Nano-filler Composites  

Yoon, Kyung Hwa (Major in Polymer Science and Engineering, Kongju National University)
Lee, Jong Won (Major in Polymer Science and Engineering, Kongju National University)
Kim, Youn Cheol (Major in Polymer Science and Engineering, Kongju National University)
Publication Information
Polymer(Korea) / v.37, no.4, 2013 , pp. 494-499 More about this Journal
Abstract
Modified polypropylene (m-PP) was fabricated by furfuryl sulphide (FS) as branching agent and m-PP/nano-filler composites were prepared with silicate and multi-walled carbon nanotube (MWCNT), using a twin screw extruder. The chemical structures and thermal properties of the m-PP were investigated by FTIR and DSC. The chemical structure of the m-PP was confirmed by the existence of =C-H stretching peak of the branching agent at 3100 $cm^{-1}$. There was no district change in melting temperature in case of m-PP, but a certain increase in crystallization temperature was notified and the increase was in the range of $10-20^{\circ}C$. The rheological properties, filler dispersion and foaming behaviors of the m-PP/nano-filler composites were investigated by dynamic rheometer, X-ray diffractometer (XRD) and scanning/transmission electron microscope (SEM/TEM). m-PP/nano-filler composites showed a high complex viscosity at a low frequency, an increase in melt elasticity, and a high shear thinning effect. Compared to pure PP, m-PP and m-PP/nano-filler composites were sufficient to enhance the foaming behavior.
Keywords
modified polypropylene; nano-filler composite; rheological properties; foaming behaviors;
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