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A Study on Formation of Needle-like Polyanilines

Published online by Cambridge University Press:  01 February 2011

Woo-Hyuk Jung ,
Dong-Young Kim ,
Young-Moo Lee  and
Stephen P. McCarthy
Woo-Hyuk Jung
Affiliation:
woohyuk.jung@gmail.com, University of Massachusetts Lowell, Plastics Engineering, One Univerisity Ave., Lowell, MA, 01854, United States, 978-453-2426
Dong-Young Kim
Affiliation:
dykim@kist.re.kr, Korea Instutue of Science and Technology, Photoelectronic Materials Research Center, 39-1 Hawelgok-dong Sungbuk-gu, Seoul, 136-791, Republic of Korea
Young-Moo Lee
Affiliation:
ymlee@hanyang.ac.kr, Hanyang University, Industrial Chemistry, 17 Haengdang-dong Sungdong-gu, Seoul, 133-791, Republic of Korea
Stephen P. McCarthy
Affiliation:
Stephen_McCarthy@uml.edu, University of Massachusetts Lowell, Plastics Engineering, One Univerisity Ave., Lowell, MA, 01854, United States
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Abstract

Needle-like polyanilines (PANi) were prepared at 15 °C by emulsion polymerization and their conductivities were obtained up to 3 S/cm according to the addition rate of ammonium peroxysulfate (APS) aqueous solutions with reaction conditions of 0.4 to 0.5 APS/aniline ratios and 0.4 to 0.5 M aniline concentrations. Needle-like complexes doped with p-toluenesulfonic acid (pTSA) were prepared with the oxidant solution added so slowly as to be for 3 to 3.6 hours. The high reaction temperatures ranging from 5 to 15 °C was the second condition to have needle-like anilinium complexes polymerized without their breaking during polymerization. A filler shape is one of the most important parameters influencing a percolation concentration of conductive fillers dispersed in a non-conductive matrix. Needle-like polyanilines could be potentially used as conductive fillers to show electromagnetic interference and radar absorption effects.

Keywords

polymercrystalpolymerization
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 949: Symposium C – Smart Dielectric Polymer Properties, Characterization and Their Devices , 2006 , 0949-C07-05
Copyright
Copyright © Materials Research Society 2007

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