한국섬유공학회지 (Textile Science and Engineering)

  • 제42권2호
  • /
  • Pages.85-92
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  • 2005
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  • 1225-1089(pISSN)
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  • 2288-6419(eISSN)
한국섬유공학회 (The Korean Fiber Society)
권호 표지

3-3'-Dimethyldiphenyl 4,4'-diisocyanate (TODI) 계 Polyurethane의 내부구조가 배향거동과 기계적 특성에 미치는 영향

Effect of Internal Structure on Deformation Behavior and Domain Mechanical Properties of 3,3'-Dimethyldiphenyl 4,4' -diisocyanate(TODI)-Based Polyurethanes

  • 김정호 (인하대학교 섬유공학과) ;
  • 이정상 (인하대학교 섬유공학과) ;
  • 이한섭 (인하대학교 섬유공학과)
  • Kim, Jung-Ho (Department of Textile Engineering, Inha University) ;
  • Lee, Jung-Sang (Department of Textile Engineering, Inha University) ;
  • Lee, Han-Sup (Department of Textile Engineering, Inha University)
  • 발행 : 2005.04.01
⟨ 이전 논문 다음 논문 ⟩

초록

New types of polyurethane (PU) have been synthesized using 3,3'-dimethyldiphenyl 4,4'-diisocyanate (TODI) in order to test the effect of the chemical structure of hard segment on the domain/segment deformation behavior and mechanical stability of polyurethane. The effect of hard segment (H/S) content on the domain/segment deformation behavior was measured with SAXS and FTIR-dichroism methods. For TODI-based PU of low H/S content, the long axes of individual hard domains of lamellar type were aligned along the uniaxial stretching direction. When the hard segment content increases, the hard domains form lamellar stacks and those stacks are either rotated or tilted towards the initial stretching depending on their H/S content. For polyurethanes of highest HIS content, the selective domain break-up phenomenon was found to be a major restructuring process. Segmental orientation behavior observed with FTIR-dichroism is consistent with domain deformation behavior observed with SAXS. Compared with MDI-based polyurethane, TODI-based polyurethane exhibits better mechanical stability and this is explained in terms of the good packing behavior of hard segments in the TODI-based polyurethanes.

키워드

참고문헌

  1. G. Oertel, 'Polyurethane Handbook', Carl Hanser Verlag, Munich Vienna New York, 1994, 2nd Ed
  2. M. F. Mark, N. M. Bikales, C. G. Overberger, and G. Menges, 'Encyclopedia of Polymer Science and Engineering', John Wiley & Sons, NY, 1988, 2nd Ed., Vol. 13
  3. N. S. Schneider, C. S. Paik Sung, R. W. Matton, and J. L. Illinger, 'Thermal Transition Behavior of Polyurethanes Based on Toluene Diisocyanate', Macromolecules, 1975, 8, 62-67 https://doi.org/10.1021/ma60043a014
  4. M. S. Dho, S. I. Ma, S. J. Choi, S. W. Seo, and H. S. Lee, 'Structure and Properties of Segmented Block Copolymer(II)-Effect of Hard Segment Content on the Thermal Stability of Polyurethanes', J Korean Fiber Soc, 1999, 36, 881-891
  5. J. Bolze, J. H. Kim, J. Y. Huang, S. G. Rah, and H. S. Youn, 'Current Status of the Synchrotron Small-Angle X-ray Scatterring Station BL4Cl at the Pohang Accelerator Laboratory', Macromolecular Research, 2002, 10(1), 2-12 https://doi.org/10.1007/BF03218282
  6. R. W. Seymour and S. L. Cooper, 'Thermal Analysis of Polyurethane Block Polymers', Macromolecules, 1973, 6(1), 48-53 https://doi.org/10.1021/ma60031a008
  7. F. Yeh, B. S. Hsiao, B. B. Sauer, S. Michel, and H. W. Siesler, 'In-situ Studies of Structure Development during Deformation of a Segmented Poly(urethane-urea) Elastomer', Macromolecules, 2003, 36, 1940-1954 https://doi.org/10.1021/ma0214456
  8. M. S. Dho, S. I. Ma, S. J. Choi, and H. S. Lee, 'Structure and Properties of Segmented Block Copolymer(I) - Effect of Hard Segment Content on the Structure and the Orientation Behavior of Polyurethanes', J Korean Fiber Soc, 1999, 36, 361-371
  9. B. D. Cullity, 'Elements of X-ray Diffraction', Addison-Wesley Pub., 1978, 2nd Ed., p.105
  10. M. W. Urban and C. D. Craver, 'Structure-Property Relations in Polymers', American Chemical Society, Washington DC, 1993