Synthesis and nitrosation of processible copolymers from pyrrole and ethylaniline

A novel, rapid synthetic protocol for controllable sizes, conductivities and monomer units of soluble polypyrrole

“…In the propagation step, there might be a chance of nitrosation of oligomers or polymers which inhibits further polymerization reaction. This interpretation is consistent with the FTIR spectral data wherein the absorption band at 2200 cm À1 is attributed to N-nitroso group, in conformity with an earlier study [41]. Interestingly, the band corresponding to N-nitroso group in the FTIR spectrum disappears while passing from WSPPy 1 to WSPPy 4, implying that the molecular weight is less influenced by N-nitrosation, with a higher molecular weight for WSPPy 4.…”

Facile synthesis of oxidative copolymers from aminoquinoline and anisidine

“…Generally, the reduction in the conductivity of the copolymers should be associated with a less efficient charge transport that could easily arise from the interruption of the order of polaron lattice because of the variation of p-conjugation and resonance effect with the formation of the AQ -AS linkages when a second monomer unit or segment of different electronic structure is incorporated. Similar decline in conductivity has also been reported for pyrrole oxidative copolymers [23]. It is interesting that the conductivity (Fig.…”

“…Smaller particle size by AFM observation should be due to contraction and then compaction during drying process of the sample. Very similar increases in the mean diameter and its standard deviation of the particles of a pyrrole/oethylaniline (5/95) oxidative copolymer from 6.92 to 8.12 mm and from 5.33 to 6.21 mm, respectively, and a similar decrease in the coefficient of variation from 76.9 to 76.5%, were observed upon ammonium treatment [23]. In addition, it is observed by a polarizing microscope that all of the copolymer particles cannot transmit polarizing light, suggesting that the particles are optically isotropic, i.e.…”

Oxidative copolymerization between toluidine and vinyl acetate

“…9 and Table IV) at OT content of 70–90 mol % imply a clear and strong copolymerization effect between OT and VA monomers. The possible reason is that the copolymerization reactivity of OT with VA monomers is higher than their homopolymerization reactivity 12. That is to say, the two types of monomers appear to activate each other, something like the copolymerization of aniline and chloroanilines 13.…”