M. Gong, C. Lee
Jan 30, 2003
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0
Influential Citations
18
Citations
Journal
Materials Chemistry and Physics
Abstract
Abstract Monomer 4-vinylbenzyl dimethyl 2-(dimethylamino)ethyl ammonium chloride ( 1 ) containing both ammonium salt and amine group was prepared and copolymerized with n -butyl acrylate ( 2 ) for the humidity-sensitive membranes. The copolymers 1 / 2 =1/0 , 4/1, 2/1 and 1/1 were cross-linked with 1,5-dibromopentane. Isothermal humidity absorption was measured for the estimation of humidity sensitivities. The cross-linked copolymer 1 / 2 =2/1 showed an average impedance of 715, 42.1 and 3.1 kΩ at 30, 60 and 90% RH, respectively. Hysteresis, temperature dependence, frequency dependence and response time were measured to estimate as a humidity sensor.