• Polymer(Korea)
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• v.26 no.1
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• pp.1-8
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• 2002

In this study, poly(arylene ether sulfone) (PAES) having thermal stability and excellent mechanical properties was synthesized to be useful for the matrix of anion exchange resin. $1^{\circ}$-Aminated poly(arylene ether sulfone) ($1^{\circ}$-APAES) was prepared by reduction reaction after lithiation of PAES. Then $3^{\circ}$-APAES was Prepared by alkylation of the amino group of $1^{\circ}$-APAES. The structures of PAES and APAESs were confirmed with FT-IR and $^1H-NMR$ spectroscopy. Also, thermal properties of the resins were characterized by DSC and TG analysis. The introduction of amine groups in PAES resulted in the increase of glass transition temperature and decrease of initial thermal degradation temperature. The ion exchange capacities of $1^{\circ}$-APAES and $1^{\circ}$-APAES were 1.19 and 1.45 meq/g, respectively.

• Applied Chemistry for Engineering
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• v.10 no.6
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• pp.857-862
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• 1999

Aminated poly(ether sulfone)(APES) was prepared by amination of nitrated poly(ether sulfone)(NPES) after poly(ether sulfone)(PES) was nitrated with mixed acid of nitric acid and sulfuric acid(sulfuric acid is a catalyst). As a results of the FT-IR spectrum analysis, the nitration of PES was confirmed by the bands of asymmetric stretching and symmetric stretching of $NO_2$ group at 1537 and $1351cm^{-1}$, respectively. Also when the NPES was aminated, it was disappeared to absorbance peaks of $NO_2$ group. And It was confirmed by the bands of asymmetric stretching and symmetric stretching of $NH_2$ group at 3470 and $3374cm^{-1}$, respectively. The optimum condition of the nitration on PES(5 g; 21.55 mmol.) was 12 hr of reaction time, $120^{\circ}C$ of reaction temperature, nitric acid of 28.00 mmol. and sulfuric acid of 52.00 mmol. As a result of the elemental analysis of APES, reapeating unit per amine groups were induced to 0.89. The adsorption rate of NO gas was lower than that of silica gel and active carbon. But the adsorption capacity of NO gas was higher than that of these. When the APES was absorbed to NO gas, the chemical adsorption rate was lower than the physical adsorption rate. But the chemical adsorption capacity of it was higher than physical adsorption capacity.