Article
  • Film Properties of Reactive Latexes Modified with Epoxy and Carboxyl Surface Functional Groups
  • Kim HS, Lee JY, Lee DY, Kim JH
  • 반응성 라텍스 입자를 포함하는 고분자 필름 물성에 관한 연구
  • 김형식, 이준영, 이덕연, 김중현
Abstract
The film properties of the reactive latexes have been studied on the reactivity of surface functional groups at the interfacial zone of reactive latexes. A series of poly(styrene-co-butylacrylate-co-glycidyl methacrylate(SB-G) latexes having different amount of surface epoxy group were prepared using semi-continuous seeded emulsion polymerization method. Carboxylated poly)styrene-co-butadiene)(SBd) was used as a latex particle containing carboxyl group. Polymer films were prepared by blending above two latexes and drying them. We have invstigated the effect of the blending ratio of two kinds of latexes and the content of epoxy groups of latex particle surface for polymer films. Interfacial crosslinking by chemical bondings between epoxy and carboxyl groups of adjacent polymer latex particles improved barrier properties and mechanical properties. As the blending ratio increased, the crosslinking density, water sorption, and the tensile strength of polymeric films were improved by the increased interfacial crosslinking. As the content of the epoxy group on latex particle surface increased, the crosslinking density increased, which resulted in the increase in tensile strength of polymeric films and the decreased in the permeability of the films.

반응성 라텍스 입자르 계면에서의 반응성기들의 반응성에 따른 라테긋 필름 물서의 변화를 조사하였다. 라텍스 입자 표면에 에폭시기가 함량별로 도입되록 반회분식 씨드 유화중합 방법을 이용하여 poly(styrene-co-butylacrylate-co-glycidyl methacrylate) (SB-G)를 제조하였으며, 카르복실기가 포함된 라텍스 입자는 carboxylated poly (styrene-co-butadiene) (SBd)를 사용하였다. 두 가지 종류의 반응성 라텍스 입자를 이용한 고분자 필름은 에멀젼 블렌딩 및 건조에 의하여 제조하였으며 고분자 필름은 블렌딩 비율에 따른 영향과 에폭시기 함량에 따른 영향으로 비교 분석하였다. 고분자 입자 사이에서 에폭시기와 카르복실기의 호학적 결합에 의한 계면 가교 반응은 계면 물성과 기계적 물성을 향상시켰다. 블렌딩 비율에 딸, 뉴-ㅎ가 증가할수록, 가교밀도, water sorption 및 인장강도는 입자간 계면 반응 정도에 따라 향상되었다. 또한 에폭시기 함량에 따른 영향으로 에폭시기 함량이 증가할수혹 가교밀 도는 증가하며 그에 따라 고분자 필름의 투습도는 감소하며 인장강도는 증가되었다.

Keywords: surface functional groups; reactive latexes; interfacial crosslinking; permeability; tensile strength

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1999; 23(6): 852-860

    Published online Nov 25, 1999