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- W2036770835 abstract "The polyaniline (PAn) polymer was synthesized by a chemical method using aniline (AN) as monomer, ammonium persulfate (APS) as initiator, and dodecylbenzene sulfonic acid (DBSA) as dopant at 0ı. Conducting polymer films were prepared on the alumina substrate with an interdigitated electrode by using the dip coating method. These films were soaked in methanol solvent for 1h at room temperature to remove excessive DBSA and then were heated at 70ı for 4h in N2. The detecting materials having a liquid phase at one atmospheric were precisely controlled by the system having a mass flow controller (MFC), temperature controller and measuring chamber. The sensitivity was estimated by heating from 70ı. The sensitivity observed in PAn sensor was lower than PAn-DBSA sensor at 1000 ppm methanol vapors under N2. because the additional thermal doping effect was resulted from increasing molecular motion in polymer chain to 70ı but DBSA used as dopant was decomposed by heating over 120ı. It caused the melting point of DBSA to be lower than 120ı. So the thermal properties of PAn and PAn-DBSA were investigated by DSC (differential scanning calorimetry). The DSC was scanned with a heating rate of 10ı/min. The PAn sample did not show the melting peak but PAn-DBSA sample showed the melting peak at 190ı. From this result, the new crystalline-region was evaluated in PAn-DBSA and increased of crystallinity of PAn polymer. And FE-SEM studies showed that the presence of the dopant strongly influenced the morphology of the polymer." @default.
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- W2036770835 date "2005-06-01" @default.
- W2036770835 modified "2023-09-23" @default.
- W2036770835 title "Sensitivity and Thermal Property of Polyaniline Sensor" @default.
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- W2036770835 doi "https://doi.org/10.4028/www.scientific.net/msf.486-487.29" @default.
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