TITLE:
Change of Spectroscopic Properties of PU/PVC Doped by Single Walled Carbon Nanotubes
AUTHORS:
L. H. Gaabour
KEYWORDS:
Nanocomposites, SWCNTs, X-Ray, TGA, Mechanical Properties
JOURNAL NAME:
Optics and Photonics Journal,
Vol.6 No.12,
December
21,
2016
ABSTRACT: Nanocomposite films based on polyurethane and polyvinyl chloride (PU/PVC) doped by low content (≤0.045 wt%) of single wall carbon nanotubes (SWCNTs) were prepared and characterized. The structural, optical, thermal and mechanical properties of the prepared nanocomposites were characterized by various tools. The IR band at 3437 cm-1 in SWCNTs vanishing for doped samples signified that SWCNTs were successfully covalently encapsulated with PU/PVC. The X-ray peaks broaden with reduced intensity which refers to a reduction of the crystallinity for the blend after increase of SWCNTs attributed to changing in the crosslink density. UV/Vis analysis reveals that the optical band gap values were decreased with increased SWCNT attributed to the formation of defects in polymeric matrix with increase in the degree of disorder in the films. These defects produce the localized states in the optical band gap. All results data showed well dispersion of SWCNTs in polymer matrix at all weight percentages and an interaction between SWCNTs and the blend occurred. The thermal analysis showed that the melting point (Tm) and degradation temperature (Td) of the obtained films were increased gradually with adding of SWCNTs. Furthermore, the thermal stability was improved after adding SWCNTs into the PU/PVC polymer blend.