Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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A Study on Synthesis of Starch-acryl Pressure Sensitive Adhesive by Soap-free Emulsion Polymerization

무유화제 유화중합에 의한 전분-아크릴 점착제의 합성에 관한 연구

  • Song, Su-Hyun (Department of Appied Chemical Engineering, Korea Institute of Technology and Education) ;
  • Kim, Young-Seok (Samyang Group, Food R&D Center) ;
  • Cho, Ur-Ryong (Department of Appied Chemical Engineering, Korea Institute of Technology and Education)
  • 송수현 (한국기술교육대학교 응용화학공학과) ;
  • 김영석 (삼양그룹 식품연구소) ;
  • 조을룡 (한국기술교육대학교 응용화학공학과)
  • Published : 2009.12.31
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Abstract

The pressure sensitive adhesives (PSA) were synthesized by soap-free emulsion polymerization of acrylic monomers such as butyl acrylate, 2-ethyl hexyl acrylate, and acrylic acid in the presence of starch as a protective colloid and copolymer. The peel strength and holding power of PSA were increased with starch contents due to the enhancement of gel content, But the initial tackiness of PSA was decreased with starch contents. The contact angle analysis of PSA indicated that the wettability was increased with starch contents owing to the increase of polarity by hydroxy group in starch. In the pH measurement of emulsion with time for biodegradability, the starch in the PSA accelerated the lowering of pH due to the formation of organic acids followed by decomposition of starch.

전분을 보호 콜로이드이자 공중합체로 사용하면서 아크릴 단량체인 뷰틸 아크릴레이트, 2-에틸 헥실 아크릴레이트, 아크릴 산을 사용하여 무유화 중합에 의해 점착제를 합성하였다. 전분의 함량이 증가할수록 점착제의 겔 함량은 증가하였고, 결과로서 전분 함량의 증가는 점착력과 유지력의 증가를 가져왔으며, 초기점착력은 감소하는 결과를 보였다. 접촉각 측정에서 점착제의 젖음성은 전분의 하이드록시 그룹에 의한 극성의 증가로 전분 함량이 증가함 따라 상승하였다. 생분해성을 간접적으로 측정하는 에멀젼의 시간에 따른 pH 측정에서 전분의 분해에 의한 유기산의 생성에 의해 전분 함량의 증가에 비례하여 pH가 감소하였다.

Keywords

References

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