Synthesis and characterization of difluor‐aniline polymers

Abstract

Undoped and chlorine doped difluoraniline polymers (PDFA) were synthesized and characterized to study the electric behavior of polyanilines with three different fluorine disubstitutions in the benzene rings that could produce polarizable molecules. The structures of the resulting polymers were studied by infrared spectroscopy focusing in the oxidation degree in the polymers. A discussion of the molecular weight of PDFAs as measured by light scattering in different solvents is presented, since the polymers form aggregates depending on the solvent used, the position of the fluorine substitutions, the doping level and the temperature. The aggregates in polarizable polymer solutions can produce wrong estimations in the molecular weight if the influence of temperature is not considered. The PDFAs thermal and electroconductivity analysis also showed dependence on the position of the fluorine substitutions.

Aggregation behavior of new cyclic saturated copolymers synthesized via ring-opening metathesis polymerization

“…For example, polymer solubility is greatly affected by the affinity between polymer and solvent. The driving force for aggregation is a decrease of the polymer solubility, which can result from intramolecular or intermolecular interactions such as hydrogen-bonding, ion-related electrostatic interactions and ligand-metal coordination [1][2][3][4][5][6][7][8][9][10][11][12][13]. Topuza et al demonstrated interactions between functional groups and a temperature dependence in forming polymer complexes between polystyreneb-poly(2-vinylpyridine) and poly(methacrylic acid) in dioxane using light-scattering measurement and viscosity measurement [2].…”

“…The solubility of alkali-soluble emulsion polymer controls the conformational transition from a compact sphere to a random coil during the process of neutralization [11]. As for poly (2,5-difluoraniline) [12] and poly(aryleneethynylene) [13], the substituent effect on solubility or aggregation has been reported.…”

Polymerization of halogenated anilines by plasma

“…Particularly, one important studied area has been the mechanisms of the electric charge motion along the polymers promoted by the halogenated dopants. Many doping strategies have been studied in this context, including experimental and theoretical works on polymers with halogens bonded to the aromatic rings 10–15…”

Polymers, composites, and characterization of conducting polyfuran and poly(2‐bromoaniline)

“…However, special attention has to be directed to the absorptions at 1580 and 1490 cm Ϫ1 assigned to CAC stretching of the quinoid and benzenoid units, respectively, because their intensities provide information related to the potential conductivity of the polymer. 14 The infrared spectra of P2BrAn salts are similar to each other. In the region of 1010 -1170 cm Ϫ1 , aromatic C-H in-plane-bending modes are usually observed.…”

“…So far, although composites and copolymers of polyanilines and alkylsubstituted polyanilines have been commonly investigated, 12,13 there are fewer studies involving composites 14 and copolymers 15 of halogen substituted polyanilines, especially poly(2-bromoanilines). 16 Similarly, studies with both polyfuran and its composites are limited in number.…”