Article
  • Hydrogen Bonding in Poly (ethylene-co-methacrylic acid)-Zinc Ionomer
  • Lee JY
  • Poly(ethylene-co-methacrylic acid)-Zinc 이오노머의 수소결합에 관한 연구
  • 이준열
Abstract
Temperature dependences of hydrogen-bond formation in a partially neutralized poly(ethylene-co-methacrylic acid) (EMAA) -Zn ionomer have been investigated by infrared spectroscopy. Unionized carboxylic acid groups remaining in a partially neutralized EMAA-Zn ionomer form two types of hydrogen bonds : carboxylic acid dimers and carboxylic acid salts. Thermodynamic parameters for these hydrogen bond formations were calculated by using integrated absorbances of the carboxylic acid carbonyl peaks. Enthalpies of -4.55 and -8.87 kcal/mol for the acid dimerization and carboxylic acid salt formation in a partially neutralized EMAA-Zn ionomer, respectively, were obtained. It is shown that the carboxylic acid monomer-dimer equilibrium in the partially neutralized EMAA-Zn ionomers is affected by the carboxylic acid salt formation between carboxylic acid and carboxylate groups.

부분적으로 중성화된 에틸렌-메타크릴산 공중합체(EMAA)-Zn 이오노머의 수소결합 형성에 대한 온도 의존성을 적외선 분광분석으로 조사하였다. EMAA-Zn 이오노머의 이온화되지 않은 상태로 남아있는 카르복실산들은 acid dimer를 형성하거나 carboxylic acid salt 형태의 수소결합을 한다. 카르복실산 C=0 흡수 피크의 면적으로부터 이들 수소결합생성에 관한 열역학적 파라미터를 계산하였다. 부분적으로 중성화된 EMAA-Zn 이오노머에서의 acid dimer 생성 엔탈피는 -4.55kcal/mol이었으며, carboxylic acid salt 생성 엔탈피는 -8.87kca1/mo1이었다. 부분적으로 중성화된 EMAA-Zn 이오노머에서의 acid monomer-dimer의 평형은 Carboxylic acid salt 형성에 의해서 영향 받는다는 것을 알 수 있었다.

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1994; 18(1): 46-54

    Published online Jan 25, 1994