Article
  • A Study on Free-Radical Homopolymerization and Copolymerization of 2-Benzamidoacrylic Acid
  • Chung PS, Lee CK
  • 2-Benzamidoacrylic Acid의 자유라디칼 중합 및 공중합에 관한 연구
  • 정판석, 이종광
Abstract
The free radical polymerization and copolymerization of 2-benzamidoacrylic acid were investigated. From the result of kinetic investigation of 2-benzamidoacrylic acid in DMF at 60.0±0.1℃, a rate equation of Rp=kp[M]1.05[I]0.52 was obtained. The overall activation energy for the polymerization was found to be 20.9 Kcal/mol within the temperature range 50∼70℃. The DTA thermogram of poly(2-benzamidoacrylic acid) showed an endothermic peak for the first degradation at about 200℃ and an exothermic peak for the second degradation at about 370℃. Copolymerization of 2-benzamidoacrylic acid with styrene and acrylic acid was carried out for the determination of monomer reactivity ratios. The monomer reactivity ratios for the monomer pairs determined at 60.0±0.1℃ using AIBN as an initiator are r1(2-benzamidoacrylicacid)=0.78, r2(styrene)=0.13 ; r1(2-benzamidoacrylicacid)=2.08, r2(acrylic acid)=0.48. The values of Alfrey-Price Q and e parameters for the 2-benzamidoacrylic acid were calculated to be 2.30 and 0.72 for the both systems.

본 연구에서는 자유라디칼 메카니즘에 의한 2-benzamidoacrylic acid의 단독중합 반응속도와 공중합 반응성을 연구하였으며, DMF 용매를 사용하여 60±0.1℃에서 단독중합시켰을 때의 중합속도(Rp)는 단량체농도[M]와 개시제농도[I]에 대하여 Rp=kp[M]1.05[I]0.52의 관계를 나타내었다. 이 단량체의 단독중합 총괄활성화 에너지는 20.9 Kcal/mol이었으며, 또한 poly(2-benzamidoacrylic acid)의 열분석도에 의하면 200℃에서 일차분해에 의한 흡열피이크가 나타났고 370℃에서 이차분해에 의한 발열피이크가 나타났다. 2-benzamidoacrylic acid를 스티렌 및 아크릴산 단량체와 공중합시켰을 때의 단량체 반응성비는 다음과 같다. r1(2-benzamidoacrylic acid)=0.78, r2(스티렌)=0.13 ; r1(2-benzamidoacrylic acid)=2.08, r2(아크릴산)=0.48. Alfrey-Price 식을 이용하여 계산한 2-benzamidoacrylic acid의 Q와 e값은 두 경우 모두 Q=2.30, e=0.72이었다.

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  • Polymer(Korea) 폴리머
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    ISSN 2234-8077(Online)
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This Article

  • 1991; 15(6): 749-758

    Published online Dec 25, 1991