Premium
Humidity sensing properties of the vinylpyridine–butyl acrylate–styrene copolymers
Author(s) -
Wu Shuizhu,
Zhu Yinlan,
Li Fengxian,
Shen Jiarui
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19991121)74:8<1992::aid-app13>3.0.co;2-f
Subject(s) - copolymer , acrylate , styrene , reagent , polymer chemistry , materials science , monomer , humidity , hysteresis , bromide , butyl acrylate , chemical engineering , chemistry , polymer , organic chemistry , composite material , thermodynamics , physics , quantum mechanics , engineering
In this article, the humidity sensors based on the vinylpyridine (VP)–butyl acrylate (BA)–styrene (St) copolymers are developed. The influencing factors of the copolymer's humidity sensing properties, such as the mol percentage of the fed monomers and the quaternization reagent ratio (namely, dibromobutane : butyl bromide ratio), are studied, and the long‐term stability of the copolymers is investigated as well. The results show that as the content of BA increases and the content of St decreases, the copolymer's hysteresis and response time decreases, and with the increasing of the quaternization reagent ratio, the copolymer's hysteresis and response time decreases. Also, the sensors based on the copolymers show 2–3% RH reproducibility under various long‐term test conditions. These results demonstrate an overall excellent performance in the reproducibility and long‐term stability. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 1992–1996, 1999