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Resistive Humidity Sensor from Copolymers Containing Quaternary Ammonium Salt (II): Four Component Copolymers  

Lee, Dong-Geun (Department of Chemistry, Dankook University)
Lim, Tae-Ho (Department of Chemistry, Dankook University)
Jeon, Young-Min (Department of Chemistry, Dankook University)
Gong, Myoung-Seon (Department of Chemistry, Dankook University)
Publication Information
Polymer(Korea) / v.31, no.4, 2007 , pp. 302-307 More about this Journal
Abstract
The resistive-type humidity sensors were prepared from the copolymers of [2-[(methacryloyloxy)ethyl]dimethyl]propylamonium bromide (MEPAB), [2-[(methacryloyloxy)ethyl]-2-hydroxyethyl]dimethylammonium bromide (MEHDAB), 2- [(methacryloyloxy)ethyl]trimethylammonium chloride (METAC), and n-butyl methylacrylate (MBA). Four component copolymers MEPAB/BMA/MEHDAB/METAC=4/4/1/1, 3/5/1/1, 2/6/1/1, 1/7/1/1 crosslinked with blocked-isocyanate on Ag/Pd electrode/alumina substrate showed a good durability at high humidities. The various electrical properties such as frequency dependency, temperature dependency, hysteresis, response time and water durability were examined. In the case of copolymer composed of MEPAB/BMA/MEHDAB/METAC=2/6/1/1, the resistance varied from $1.4\;M{\Omega}$ to $2.9\;k{\Omega}$ at $25^{\circ}C$ in the range of $30{\sim}90\;%RH$ and this copolymers showed a good linearity and low hysteresis.
Keywords
resistive humidity sensor; 4-component copolymer; ammonium salt; isocyanate crosslinker;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 10  (Related Records In Web of Science)
Times Cited By SCOPUS : 9
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