Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Comparison of Properties of Waterborne Polyurethanes Containing Various Polyols

다양한 폴리올을 갖는 수분산 폴리우레탄의 특성 비교

  • Sur, Suk-Hun (Department of Organic Material Science and Engineering, Busan National University) ;
  • Lee, Young-Hee (Department of Organic Material Science and Engineering, Busan National University) ;
  • Park, Cha-Cheol (Libral Arts College, Dongseo University) ;
  • Kim, Han-Do (Department of Organic Material Science and Engineering, Busan National University)
  • 서석훈 (부산대학교 유기소재시스템공학과) ;
  • 이영희 (부산대학교 유기소재시스템공학과) ;
  • 박차철 (동서대학교 교양대학) ;
  • 김한도 (부산대학교 유기소재시스템공학과)
  • Received : 2018.08.09
  • Accepted : 2018.09.07
  • Published : 2018.09.28
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Abstract

Various waterborne polyurethanes (WPU) with three different types of polyol such as ester type polyol [adipic acid (A)/BD/3-methyl-1,5-pentandiol (MPD) and A/BD]//carbonate type polyol (C/HD/MPD, C/HD, C/BD)//ether type polyol (PTMG) were prepared in this study. This study focused on the effect of polyol type on the properties of WPU. Soft segment Tg (Tgs), 100% elastic modulus and tensile strength were highest when using carbonate polyol, followed by ester polyol and ether polyol, while those of elongation showed the opposite trend. The WPU synthesized with MPD - containing polyol showed lower Tgs, 100% elasticity and strength, and higher elongation than MPD - free WPU. The % transmittance and transparency of the WPU film containing the MPD component was superior to that of the WPU film containing no MPD component, and it was found that the film based on carbonate polyol was slightly better than the film based on ester polyol and ether polyol.

3-Methyl-1,5-pentanediol (MPD)/1,6-hexane diol (HD)/1,4-butanediol (BD)과 adipic acid (A)로부터 얻어진 에스터 폴리올(A/BD/MPD 및 A/BD)과 카보네이트 폴리올(C/HD/MPD, C/HD, C/BD)과 에터 폴리올 [poly(tetramethylene oxide glycol), PTMG]과 같은 3 종류의 폴리올을 사용한 수 분산 폴리우레탄(WPU) 에멀젼(평균 입도: 59 ~ 71 nm)을 제조하였다. 본 연구는 폴리올 분자구조(소프트 세그먼트의 분자구조)가 WPU의 특성에 미치는 영향에 대하여 초점을 맞추었다. 소프트 세그먼트 Tg (Tgs), 100% 탄성률 및 인장강도는 카보네이트 폴리올을 사용한 경우가 가장 높고 그 다음이 에스터 폴리올이며 에터 폴리올이 가장 낮게 나타났으나, 신도의 경우는 이와 반대의 경향을 나타내었다. 그리고 MPD가 함유된 폴리올을 이용하여 합성된 WPU의 경우가 MPD를 함유하지 않은 경우보다 Tgs, 100% 탄성률 및 강도는 낮고 신장률은 보다 높게 나타났다. MPD 성분을 함유한 WPU 필름의 투명도는 MPD 성분을 함유하지 않은 WPU 필름보다 광 투광도 및 투명도가 우수함을 알 수 있었으며, 카보네이트 폴리올 기반의 WPU 필름의 광 투광도 및 투명도가 에스터 폴리올 및 에터 폴리올 기반의 WPU 필름보다 약간 우수함을 알 수 있었다.

Keywords

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