Studies of optical, morphological and electrical properties of POMA/PMMA blends, using two different levels of doping with CSA

Abstract

Poly(o-methoxyaniline) (POMA) was synthesized by oxidative polymerization of the monomer o-methoxyaniline. POMA/ poly(methyl methacrylate) (PMMA) blends were produced by dissolving both polymers in chloroform (CHCl 3 ).The amount of camphor sulfonic acid (CSA) used as dopant of POMA was different, providing two methods for preparation of the blends. Solutions were analyzed by Fourier transform infrared spectroscopy (FTIR) and then deposited on glass substrate by spin coating for characterization by atomic force microscope (AFM) and current versus voltage (I × V) curves. FTIR spectra of solutions were similar as expected. In the AFM images a reduction and/or loss of globules common in conducting polymers (CP) such as polyaniline (PANI) and its derivatives was observed. Films produced with different amounts of CSA presented distinct, linear and non-linear I × V curves.

Electromagnetic, Morphological, and Electrical Characterization of POMA/Carbon Nanotubes-Based Composites

“…The band at 3437 cm −1 is attributed to the formation of NH bonds due to the protonation of nitrogen, in accordance with the literature [16]. The contribution at 2800 cm −1 may be associated with both axial deformation of C-H from aromatic carbon and also C-H stretching of the OCH 3 group in the polymeric chain [26]. The band at 1579 cm −1 is associated with quinoid (Q) structure and 1490 cm −1 band with benzenoid (B) structure.…”

“…The presence of bands at 1500 cm −1 and 1600 cm −1 is also observed. According to the literature these contributions are related to the polymer formation from amine and imine units [26]. Table 3 summarizes the main infrared bands shown in Figure 2.…”

Comparatively Thermal and Crystalline Study of Poly(methyl‐methacrylate)/Polyacrylonitrile Hybrids: Core–Shell Hollow Fibers, Porous Fibers, and Thin Films

“…And the stretching nitrile (CN) group shifted to higher energy position at 2360 cm −1 (CN), ascribing to the interaction of amide nitrogen (DMF) and nitrile group (PAN) . The spectra of raw PMMA powder, PMMA fibers, PMMA/PAN porous thin films, core–shell hollow PMMA/PAN fibers, and PMMA/PAN porous fibers showed a weak peak around 999 cm −1 and two strong peaks at 1146 and 1726 cm −1 , corresponding to the vibrations of C–H, axial asymmetric bend of CCO and PMMA ester (CO) groups, respectively (Figure a–e) . The peaks at around 1195–1265 cm −1 were obtained due to the COC stretching and deformation vibration .…”

“…[50][51][52][53][54] The spectra of raw PMMA powder, PMMA fibers, PMMA/PAN porous thin films, core-shell hollow PMMA/PAN fibers, and PMMA/PAN porous fibers showed a weak peak around 999 cm −1 and two strong peaks at 1146 and 1726 cm −1 , corresponding to the vibrations of C-H, axial asymmetric bend of C C O and PMMA ester ( C O) groups, respectively (Figure 4a-e). [55] The peaks at around 1195-1265 cm −1 were obtained due to the C O C stretching and deformation vibration. [55,56] The spectra of the PMMA powders, PMMA fibers, PMMA/PAN porous thin films, core-shell hollow PMMA/PAN fibers, and PMMA/PAN porous fibers showed the obvious peaks at around 2950 and 3002 cm −1 , attributing to the C H bonds stretching vibrations of the CH 2 and CH 3 groups in PMMA (Figure 4c-e).…”

“…[55] The peaks at around 1195-1265 cm −1 were obtained due to the C O C stretching and deformation vibration. [55,56] The spectra of the PMMA powders, PMMA fibers, PMMA/PAN porous thin films, core-shell hollow PMMA/PAN fibers, and PMMA/PAN porous fibers showed the obvious peaks at around 2950 and 3002 cm −1 , attributing to the C H bonds stretching vibrations of the CH 2 and CH 3 groups in PMMA (Figure 4c-e). [57,58] And the peak at 1450 cm −1 , at the same position with PAN, was assigned to the C H vibration of PMMA.…”