Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Effect of Molecular Structure on Domain Thermal Stability of 3,3′-Dimethyldiphenyl 4,4′-Diisocyanate(TODI) Based Polyurethanes

3,3′-Dimethyldiphenyl 4,4′-diisocyanate(TODI)계 Polyurethane의 분자구조가 Domain의 열적 안정성에 미치는 영향

  • 김정호 (인하대학교 섬유공학과) ;
  • 이정상 (인하대학교 섬유공학과) ;
  • 이한섭 (인하대학교 섬유공학과)
  • Published : 2003.12.01
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Abstract

A series of polyurethanes having different hard segment contents have been synthesized using 3,3'-dimethyldiphenyl 4,4'-diisocyanate (TODI) in order to test the effect of the molecular structure of hard segment on the phase separation behavior and thermal stability of polyurethane (PU). The effect of hard segment content on the thermal stability of polyurethane was evaluated using DSC, FTIR, and SAXS methods. Based on the segmental mixing behavior observed with FTIR and on the domain disruption behavior with SAXS, it was found that increasing the hard segment content enhances the thermal stability of PU. Furthermore, compared with MDI-based PU, TODI-based PU was found to have better thermal stabilities. This difference was explained in terms of the good packing behavior between hard segments in the TODI-based polyurethane due to its linear structure. The effect of molecular structure on the order-disorder transition behavior was much more pronounced when hard segment content was relatively low.

Keywords

References

  1. Polyurethane Handbook (2nd ed.) G.Oertel
  2. Encyclopedea of Polymer Science and Engineering (2nd ed.) v.13 M.F.Mark;N.M.Bikales;C.G.Overerger;G.Menges
  3. J. Appl. Polymer Sci. v.10 Properties of Linear Elastomeric Polyurethanes S.L.Cooper;A.V.Tobolsky
  4. Journal of Polymer Science Part B: Polymer Letters v.8 Some Results on Electron Microscope Investigaions of Polyether-urethane and Polyester-urethane Block Copolymers J.A.Koutsky;N.V.hien;S.L.Cooper
  5. Journal of Polymer Science: Polymer Physics Edition v.23 Small-Angle Scattering Analysis of Hard-Microdomain Structure and Microphase Mixing in Polyurethane Elastomers L.M.Leuung;J.T.Koberstein
  6. Journal of Polymer Science: Part B:Polymer Physics v.37 Domain Structure and Interphase Dimension in Poly(urethaneurea) Elastomer Using DSC and SAXS S.G.Musselman;T.M.Santosusso;J.D.Barnes;L.H.Sperling
  7. Macromolecules Thermal Transition Behavior of Polyurethanes Based on Toluene Diisocyanate N.S.Schneider;C.S.P.Sung;R.W.Mtton;J.L.Illinger
  8. J. Korean Fiber Soc. v.36 no.12 Structure and Properties of Segmented Block Copolymer(Ⅱ)-Effect of Hard Segment Content on the Thermal Stability of Polyurethanes M.S.Dho;S.I.Ma;S.J.Choi;S.W.Seo;H.S.Lee
  9. Macromolecular Research v.10 no.1 Current Status of the Synchrotron Small-Angle X-ray Scatterring Station BL4C1 at the Pohang Accelerator Laboratory J.Bolze;J.H.Kim;J.Y.Huang;S.G.Rah;H.S.Youn
  10. Macromolecules v.6 no.1 Thermal Analysis of Polyurethane Block Polymers R.W.Seymour;S.L.Cooper
  11. Elements of X-ray Diffraction(2nd ed.) B.D.Cullity
  12. Macromolecules v.30 Time-Resolved SAXS, WAXS, and DSC Study of Melting of Poly(aryl ether ether ketone) (PEEK) Annealed from the Amorphous State C.Fougnies;P.Damman;D.Villers;M.Dosiere;M.H.J.Koch
  13. Macromolecules v.7 no.3 Morphology and Deformation Mechanism of Segmented Poly(urethaneureas) in Relation to Spherulitic Crystalline Textures I.Kimura;H.Ishihara;H.Ono;N.Yoshihara;S.Nomura;H.Kawai
  14. Macromolecules v.26 Investigation of the Melting Behavior of Poly(aryl ether ketones) by Simultaneous Measuements of SAXS and WAXS Employing Synchrotron Radiation K.N.Krueger;H.G.Zachmann