Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Effect of Chain Structure of Diisocyanate and Chain Extender on the Thermal Characteristics of Polyurethane

Diisocyanate 및 Chain Extender의 화학적 구조가 폴리우레탄의 열적 특성에 미치는 영향

  • Park, Ki-Ho (Department of Textile Engineering, In-ha University) ;
  • Jin, Gangfu (Department of Textile Engineering, In-ha University) ;
  • Lee, Han-Sup (Department of Textile Engineering, In-ha University)
  • 박기호 (인하대학교 섬유공학과) ;
  • 김광복 (인하대학교 섬유공학과) ;
  • 이한섭 (인하대학교 섬유공학과)
  • Published : 2008.04.30
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Abstract

Polyurethane(PU), a type of thermoplastic elastomer, consists of two different segments (hard and soft segments) that are incompatible at room temperature. Depending on the chemical and physical structure of those two segments, polyurethane shows various internal structures. In this study, a series of polyurethane were synthesized using PPDI (l,4-phenylene diisocyanate), TODI(3,3'-dimethyl diphenyl 4,4'-diisocyanate), MDI(4,4'-diphenylmethane diisocyanate) as disocyanate, 1,4 BD and HQEE(hydroxyquinone-di-(beta-hydroxyethyl)ether) as chain extender in order to test the effect of chemical structure of hard segment on the phase separation behavior and thermal stability of polyurethane. The effect of diisocyanate and chain extender on the thermal stability of polyurethane was measured with DSC, POM, SAXS and FTIR methods. Compared with PU based on the asymmetric and aliphatic component, PUs based on the symmetric and aromatic chemical structures were found to form phase separated structure showing enhanced thermal stability. The good thermal properties were also explained in terms of the good packing behavior between hard segments in the PPDI-based polyurethane.

Keywords

References

  1. G. Oertel, 'Polyurethane Handbook', 2nd Ed., Carl Hanser Verlag, Munich, Vienna, New York, 1994
  2. M. F. Mark, N. M. Bikales, C. G. Overberger, and G. Menges, 'Encyclopedia of Polymer Science and Engineering', 2nd Ed., Vol. 13, John Wiley & Sons, 1988
  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. J. P. Sheth, D. B. Klinedinst, T. W. Pechar, G. L. Wilkes, E. Yilgor, and I. Yilgor 'Time-Dependent Morphology Development in a Segmented Polyurethane with Monodisperse Hard Segments Based on 1,4-Phenylene Diisocyanate', Macromolecules, 2005, 38, 10074-10079 https://doi.org/10.1021/ma051063a
  5. J. P. Sheth, D. B. Klinedinst, G. L. Wilkes, I. Yilgor, and E. Yilgor, 'Role of Chain Symmetry and Hydrogen Bonding in Segmented Copolymers with Monodisperse Hard Segments', Polymer, 2005, 46, 7317-7322 https://doi.org/10.1016/j.polymer.2005.04.041
  6. I. Yilgor, E. Yilgor, I. G. Guler, T. C. Ward, and G. L. Wilkes, 'FTIR Investigation of the Influence of Diisocyanate Symmetry on Themorphology Development in Model Segmented Polyurethanes', Polymer, 2006, 47, 4105-4114 https://doi.org/10.1016/j.polymer.2006.02.027
  7. J. H. Kim, J. S. Lee, and H. S. Lee, 'Effect of Molecular Structure on Domain Thermal Stability of 3,3'-Dimethyldiphenyl 4,4'-Diisocyanate(TODI) Based Polyurethanes', J Korean Fiber Soc, 2003, 40(6), 500-509
  8. J. H. Kim, J. S. Lee, and H. S. Lee, 'Effect of Internal Structure on Deformation Behavior and Domain Mechanical Properties of 3,3'-Dimethyl 3,3'-Dimethyldiphenyl 4,4'- Diisocyanate(TODI) Based Polyurethanes', Text Sci Eng, 2005, 42(2), 85-92
  9. R. W. Seymour and S. L. Cooper, 'Thermal Analysis of Polyurethane Block Polymers', Macromolecules, 1973, 6, 48-53 https://doi.org/10.1021/ma60031a008
  10. B. D. Cullity, 'Elements of X-ray Diffraction', 2nd Ed., Addison-Wiley Pub., 1978, p.105
  11. C. Fougnies, P. Damman, D. Villers, M. Dosiere, and M. H. J. Koch, 'Time-Resolved SAXS, WAXS, and DSC Study of Melting of Poly(aryl ether ether ketone) (PEEK) Annealed from the Amorphous State', Macromolecules, 1997, 30, 1385-1391 https://doi.org/10.1021/ma961150q
  12. I. Kimura, H. Ishihara, H. Ono, N. Yoshihara, S. Nomura, and H. Kawai 'Morphology and Deformation Mechanism of Segmented Poly(urethaneureas) in Relation to Spherulitic Crystalline Textures', Macromolecules, 1974, 7, 355-363 https://doi.org/10.1021/ma60039a018
  13. S. R. Yoo, S. W. Seo, and H. S. Lee, 'Orientation and Phase Separated Structure of Polyurethanes having Various Chemical Strictures', Polymer(Korea), 1997, 21, 467-479