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Synthesis and Characterization of Polyurethane for Artificial Leather Using Bio Polyol

바이오 폴리올을 이용한 인공피혁 코팅용 폴리우레탄의 합성 및 특성

  • Sur, Suk-Hun (Korea Institute of Footwear and Leather Technology) ;
  • Choi, Pil-Jun (Korea Institute of Footwear and Leather Technology) ;
  • Ko, Jae-Wang (Korea Institute of Footwear and Leather Technology) ;
  • Lee, Jae-Yeon (Korea Institute of Footwear and Leather Technology)
  • Received : 2018.10.18
  • Accepted : 2018.12.04
  • Published : 2018.12.27

Abstract

Wet polyurethane resin was synthesized by using polytrimethylene ether glycol prepared from 1,3-propanediol produced by fermentation from corn sugar as bio polyol and polyether-polyol(PTMG). Physical properties and cell characteristics by wet coagulation were investigated using the synthesized wet polyurethane resin. The tensile strength of wet polyurethane resin decreased with increasing content of bio polyol as copolymer polyol, but it tended to increase elongation at break and tear strength. As a result of thermal characteristic analysis, it was found that the glass transition temperature was slightly increased as the content of bio polyol increased. As a result of comparing the cell characteristics by the wet coagulation method, it was found that the shape of the cell was good when the ether polyol and the bio polyol were used alone.

Keywords

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Scheme 1. Preparation process of DMF based polyurethanes.

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Figure 1. Viscosity of polyurethanes.

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Figure 2. FT-IR spectra of polyurethanes.

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Figure 3. DSC thermograms of polyurethane films.

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Figure 4. Tan delta of polyurethane films.

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Figure 5. TGA curve of polyurethane films.

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Figure 6. Stress-strain curves of polyurethane films.

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Figure 7. SEM micrographs of wet-type artificial leather based on nonwoven fabrics coated with DMF based polyurethanes.

Table 1. Macroglycols used in this study

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Table 2. Sample designation and composition of Wet-PU containing bio polyol

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Table 3. Thermal and mechanical properties of polyurethane films

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