Abstract
This study was to investigate the effect of main monomer, butyl acrylate instead of 2-ethylhexyl acrylate, of acrylic PSAs on adhesive properties. The copolymers of butyl acrylate, acrylic acid and 2-hydroxyethyl acrylate were synthesized and their adhesive properties were investigated after crosslinking with two different agents. Comparing to 2-hydroxyethyl acrylate-based one which has branch-like side groups, butyl acrylate-based PSA with linear side groups show poor adhesive properties. In case of crosslinking agent, epoxy-typed agent than isocyanate-typed one showed better properties than isocyanate-typed one because epoxy-typed agent has more crosslinking sites and produces more flexible bonds, ester and ether, than isocynate-typed one. Most adhesive properties of PSAs were increased with acid content.
본 연구에서는 아크릴 접착제의 물성에 대한 주 모노머의 영향을 비교하기 위하여 2-ethylhexyl acrylate 대신에 butyl acrylate를 사용하여 acrylic acid와 2-hydroxyethyl methacrylate의 공중합체를 합성하고 2종의 경화제를 이용하여 접착 물성을 연구하였다. 선형의 측쇄사슬을 가진 butyl acrylate계 점착제는 가지형태의 측쇄를 가진 2-ethylhexyl acrylate계 접착제에 비해 낮은 접착특성을 보였다. 경화제의 경우 가교점이 많고 가교반응을 통해 유연한 ether나 ester그룹을 생성하는 epoxy형 경화제에서 우수한 물성을 보였고 관능기인 산의 농도가 높을수록 접착특성이 향상되는 것을 관찰하였다.
