Composites of high molecular weight polyaniline with various weight percentages of multi-walled carbon nanotubes(MWNTs) were synthesized in the presence of selected dissolved neutral salt by in situ polymerization.The composites were characterized by means of SEM,FTIR and XRD,four-point probe conductivity measurements.The results indicate that the composites possess very different morphologies,high electrical conductivities and good crystallization compared with high molecular weight polyaniline.
By oxidative coupling polymerization a novel electroactive polyamide,with fixed conjugated length of oligoaniline(amine-capped aniline pentamer)in the main chain,was successfully synthesized.The structure of the electroactive polyamide was confirmed via FTIR and NMR.The UV-Vis spectra were used to monitor the chemical oxidation process of the reduced polyamide.Moreove,its electrochemical behavior was investigated by cyclic voltammetry(CV)measurement.It was found that the obtained electroactive polyamide with amine-capped aniline pentamer segments had a quasi-reversible electrochemical property in the cyclic voltammetry,which was the same as polyaniline.Its electrical conductivity is about 1.24×10-6 S/cm at room temperature upon preliminarily protonic-doped experiment.
A novel azo compound with ’dumbbell shape’ was synthesized successfully and characterized by MALDI-MS,FTIR,elemental analysis,1H NMR and 13C NMR.UV-Vis spectrum was used to monitor the trans-cis isomerization and theoretical calculations were used to modelize the trans and cis isomers.The trans and cis isomers of the ’dumbbell shape’ azo compound are both stable at room temperature because of the large end group.
