Solvents polyaniline chemical polymerization

Nanofibers in Conventional Polyaniline Morphological Evolution of Polyaniline during Chemical Polymerization Suppressing Secondary Growth to Make Pure Nanofibers Effect of Solvents on the Intrinsic Morphology of Polyaniline Polyaniline Nanofibers Obtained by Solvent Exchange Processing and Characterization of Polyaniline Nanofibers... 

Polyaniline has always been at the forefront of interdisciplinary research on account of its unique reversible prototropic dopability, excellent redox recyclability, chemical and environmental stabiUty, low cost and easy preparation [68], However, the intractable insolubility of polyaniline in common organic solvents is the most significant factor hampering commercial use. As a backbone modification of polyaniline, polymer 22 was synthesized by chemical polymerization of p-selenienylaniline with FeCb [69]. The polymer was soluble in THF, DMF, NMP and DMSO and exhibited a reversible prototropic doping process. Upon doping with iodine, the pellet powder sample showed a low conductivity of 8.0 x 10 S cm . ... 

The molecular weights of substituted polymers are typically low compared with parent polymers due to the bulky nature of the ring substituents, which can hinder polymerization however, solubility in common organic solvent is increased. Dao et al. [193] have studied the effect of alkyl substituents on the molecular weight of polyaniline. The molecular weight of chemically prepared poly(2-methyl aniline) and poly(2-ethyl aniline) was reportedly 7000 and 5000g/mol, respectively, which is 15-times lower than polyaniline (80 000) prepared under identical conditions. A similar effect of alkyl substituents was observed on molecular weights of polythiophenes [207, 208]. 

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