The IR spectroscopy study shows miscibility between PMMA-PVC blends due to hydrogen bonding between C¼O of PMMA and hydrogen from CHCl of PVC. This blend system is doped by Camphor Sulphonic Acid (CSA) in the entire composition range. The doping of CSA in PVC, in PMMA and in PMMA-PVC blends shows changes in FTIR spectra. The interaction between PVC and CSA is through hydrogen bonding between C¼O of CSA and CHCl of PVC. Doping PMMA with CSA, indicate an interaction between H þ ion of CSA and oxygen atoms of C¼O and -OCH 3 of PMMA. Whereas in PMMA-PVC blend interaction between H þ ion of CSA and oxygen atom of C¼O of PMMA.
SYNOPSISPolyaniline (PAn), a n important conducting polymer, was synthesized chemically. Percentage crystallinity of' PAn on doping with various dopants (viz., hydrochloric acid, formic acid, iodine, methylene blue) has been investigated using wide-angle X-ray diffraction analysis. It is observed that percentage crystallinity (Xc %) for PAn increases after doping, and it is different for different dopants. T h e electrical conductivity measurements of these samples show t h a t there is a n increase in electrical conductivity with a n increase in crystallinity. (0
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