Synthesis of Sulfonated Poly(phenylene sulfide) via Soluble Precursor and its Ammonia Gas Adsorption

용해성 전구체를 통한 Sulfonated Poly(phenylene sulfide)의 합성과 암모니아가스 흡착

  • Son, Won Keun (Department of Polymer Science & Engineering, Chungnam National University) ;
  • Kim, Hyun Suk (Department of Polymer Science & Engineering, Chungnam National University) ;
  • Park, Soo Gil (Department of Chemical Engineering, Chungbuk National University)
  • 손원근 (충남대학교 고분자공학과) ;
  • 김현석 (충남대학교 고분자공학과) ;
  • 박수길 (충북대학교 공업화학과)
  • Received : 1998.11.26
  • Accepted : 1999.06.14
  • Published : 1999.08.10

Abstract

In this work, sulfonated poly(phenylene sulfide) (SPPS) was prepared by demethylation with aqueous NaOH solution after poly[methyl[4-(phenylthio)phenyl]sulfonium trifluoromethanesulfonate](PPST) was sulfonated with fumic sulfonic acid(10% $SO_{3}-H_{2}SO_{4}$). PPST soluble in organic solvents was synthesiszed by self-condensation polymerization of methyl-(phenylthio)phenyl sulfoxide(MPPSO). SPPS showed IR bands of asymmetric O=S=O stretching at $1200cm^{-1}$ and S-O stretching at $621cm^{-1}$ from $-SO_{3}H$ group. From the result, it could be known that sulfonic acid groups were introduced to poly(phenylene sulfide). when PPST was sulfonated for 12hr at $150^{\circ}C$, 1.48 sulfonic acid groups were introduced per repeat unit. The weight average molecular weight(Mw) of PPST and SPPS determined by high temperature GPC were 118323 and 131204, respectively. The SPPS exhibited adsorption capacity of ammonia gas $9.67mmol\;NH_{3}/g$ and it was much higher than that of active carbon or silica gel.

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