[Study of the pH sensitive polymer].
A pH sensitive polymer was prepared by copolymerization of methacrylic acid as monomer, diethylene glycol dimethacrylate as cross-linking reagent, heptane as porogen, and fluorescent dye eosin as indicator. The factors of influence on the preparation, and the character of the pH sensitive polymer for pH were studied. The maximal emission wavelength of eosin was red shifted in the polymer than in solution, the apparent Ka largened, and the dissociation equilibrium of indicator was shifted to acidity direction, because the polarity of polymer diminished. Under the optimal condition, the calibration curve of the pH sensitive polymer covered the range of pH 0-3.0 with good reproduction and reversibility.
Guo
Liang-Qia
LQ
Institute of Food Safety and Environment Monitoring, Fuzhou University, Fuzhou 350002, China.
Xie
Zeng-Hong
ZH
Lin
Xu-Cong
XC
Zheng
Xiang-Hua
XH
Zhang
Mao-Sheng
MS
Chen
Guo-Nan
GN
D000179:Acrylates / Q000737:chemistry; D004801:Eosine Yellowish-(YS) / Q000737:chemistry; D005026:Ethylene Glycols / Q000737:chemistry; D006536:Heptanes / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008689:Methacrylates / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
D000179:Acrylates; D005026:Ethylene Glycols; D006536:Heptanes; D008689:Methacrylates; D011108:Polymers; C008384:methacrylic acid; C047521:diethylene glycol dimethacrylate monomer; D004801:Eosine Yellowish-(YS)