화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.36, No.1, 29-33, January, 2012
Export Citation
아크릴산 단량체와 아지리딘 경화제 함량에 따른 점착제의 점착물성 변화
Adhesive Property Changes Associated with the Content of Acrylic Acid Monomer and Aziridine Crosslinking Agent
최환석, 황효연, 정선경1, 이승구2, 이기윤†
  • 충남대학교 고분자공학과
  • 1자동차부품연구소
  • 2충남대학교 유기소재섬유시스템공학과
Hwan Seok Choi, Hyo Yeon Hwang, Sun Kyoung Jeoung1, Seung Goo Lee2, and Kee Yoon Lee†
  • Department of Polymer Science and Engineering, Chungnam National University, Daejeon 305-764, Korea
  • 1Korea Automotive Technology Institute, Chonan 333-910, Korea
  • 2Department of Advanced Organic Materials & Textile System Engineering, Chungnam National University, Daejeon 305-764, Korea
E-mail:
초록
관능성 단량체로서 acrylic acid(AA)를 사용하였고, 기본 단량체로서는 2-ethylhexyl acrylate(2-EHA)를 사용하여 용액중합의 방법으로 점착제를 합성하였다. 점착제의 점착물성 중에 AA와 경화제 함량에 따른 점착제의 표면에너지와 물성변화 연구를 조사하였다. 합성된 점착제의 구조는 FTIR을 통하여 확인하였고 점도와 분자량은 Brookfield 점도계와 GPC를 사용하여 각각 측정하였다. 분자량과 점도는 AA가 6 wt%까지는 함량증가에 따라 증가하였으며 6 wt% 이상에서는 감소하였다. 이러한 경향은 표면에너지 역시 AA 함량증가에 따라 COOH 그룹에 의한 극성 강화로 표면에너지는 증가하였다. 반면, 점착력은 분자량과 반비례 관계를 보였으며 AA 함량과 경화제 함량 증가에 따라 감소하는 경향을 나타내었다.
Solution type pressure sensitive acrylic adhesives were synthesized from 2-ethylhexyl acrylate (2-EHA) as a base monomer and acrylic acid as a functional monomer. The surface energy and basic physical properties of synthesized PSA (pressure sensitive adhesives) were investigated as a function of contents of acrylic acid and crosslinking agent. The structures of adhesive were identified by FTIR. Viscosities and molecular weights of PSA were measured by a Brookfield viscometer and GPC, respectively. Consequently, molecular weight and viscosity increased as the contents of acrylic acid increased up to 6 wt% and then decreased at higher contents. Surface energy increased as the contents of acrylic acid increased owing to the increase of COOH groups, which yielded the enhancement of polarity of PSA. On the other hands, their peel strengths were inversely proportional to molecular weight and showed tendencies of decreasing as the contents of acrylic acid and crosslinking agent increased.
Keywords:PSA(pressure sensitive adhesive);acrylic monomer;functional monomer;crosslinking agent;surface energy.
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