Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Synthesis and Characterization of Poly(urethane-ethyl acrylate) Hybrid Emulsion

폴리(우레탄-에틸 아크릴레이트) 혼성 에멀젼의 합성과 물성 비교 연구

  • Cheong, In Woo (Yonsei Center for Nanotechnology, School of Chemical Engineering and Biotechnology, Yonsei University) ;
  • Lee, Jong Kil (Yonsei Center for Nanotechnology, School of Chemical Engineering and Biotechnology, Yonsei University) ;
  • Kim, Jung Hyun (Yonsei Center for Nanotechnology, School of Chemical Engineering and Biotechnology, Yonsei University)
  • 정인우 (연세대학교 화공생명공학부, 연세나노과학기술 연구소) ;
  • 이종길 (연세대학교 화공생명공학부, 연세나노과학기술 연구소) ;
  • 김중현 (연세대학교 화공생명공학부, 연세나노과학기술 연구소)
  • Received : 2004.08.16
  • Accepted : 2004.11.02
  • Published : 2005.02.10
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Abstract

Poly(urethaneethyl acrylate) hybrid emulsions were synthesized to improve their thermomechanical and solvent resistance properties. In the synthesis, dimethylol propionic acid was used to impart hydrophilicity to the hybrid polymers, and ethyl acrylate monomer was added to the polyurethane prepolymer after neutralization with triethylamine. After dispersion of the neutralized prepolymer, chain extension was carried out with ethylene diamine. Consequently, poly(urethaneethyl acrylate) hybrid emulsion was prepared via soap free emulsion polymerization of ethyl acrylate with reduction-oxidation initiator couple of t-butyl hydroperoxide/sodium bisulfite at $50^{\circ}C$. Tehsile strength, 100% modulus, elongation, and solvent-resistance properties of the hybrid emulsion were measured and compared with those of polyurethane homopolymer, poly(ethyl acrylate) homopolymer, and simple blended samples.

아크릴 혼성 폴리우레탄 고분자의 열적-기계적 물성 및 내화학성 향상을 위해 프리폴리머 혼합 공정 및 무유화 중합을 통해 폴리(우레탄-에틸 아크릴레이트) 혼성 에멀젼을 합성하였다. 친수성 그룹의 도입을 위해 디메틸올 프로피온산을 사용하였으며, 폴리우레탄 프리폴리머 제조 후 프리폴리머에 에틸 아크릴레이트 단량체를 투입, 트리에틸 아민으로 증화시킨 후, 물에 분산시켜 안정한 에멀젼 액적을 형성하였다. 이 액적에 사슬 연장제인 에틸렌 디아민을 투입하여 폴리우레탄의 분자량을 증가시킨 후, 산화-환원 개시제인 t-BHP/SBS를 이용하여 $50^{\circ}C$에서 무유화 중합을 통해 폴리(우레탄-에틸 아크릴레이트) 혼성 에멀젼을 얻었다. 폴리(우레탄-에틸 아크릴레이트) 혼성 에멀젼의 물성(인장강도, 100% 모듈러스, 신율 및 내용제성)을 단독 폴리우레탄, 폴리(에틸 아크릴레이트) 및 단순 블렌딩에 의한 샘플과 비교 분석하였다.

Keywords

Acknowledgement

Supported by : 한국과학기술기획평가원(KISTEP), 나노과학기술연구소(Yonsei Center for Nanotechnology)

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