Structure and Properties of Segmented Block Copolymer(I) -Effect of Hard Segment Content on the Structure and the Orientation Behavior of Polyurethanes-

Segmented Block Copolymer의 구조 및 특성(I) -Hard segment의 함량이 Polyurethane의 구조 및 배향 거동에 미치는 영향-

  • Published : 1999.05.01

Abstract

Polyurethanes containing various amounts of hard segment (HS) were synthesized with MDI, BD and PTMO of 1800g/mol molecular mass. The effects of HS content on the microphase separated structure and the deformation behavior were studied with FTIR, synchrotron SAXS and mechanical methods. It was found from the infrared dichroism method that the segmental orientation behavior was sensitively affected by the internal structure. Based on the dichroic results, a schematic model for the morphology of the segmented block copolymers containing different amounts of HS is suggested. As the HS content increases, the morphology changes from a soft-segment-continuous phase to a HS-continuous phas inversion was found to occur at around 50% HS content. The domain orientation and deformation behavior were also investigated with the synchrotron SAXS method. Using and one-dimensional detector and uniaxial stretcher, domains in which lamellae were oriented along the deformation direction were found to undergo expansion of the inter-domain spacing, i.e., d-spacing, at low draw ratio. As the draw ratio was increased further, the domain break-up and formation of new structure were observed for the polyurethanes of lower HS content. The mechanical stability of the hard domains was also found to increase with the HS content.

Keywords

References

  1. Encyclopedia of Polymer Science and Engineering (2nd Ed) v.13 M. F. Mark;N. M. Bikales;C. G. Overberger;G. Menges
  2. J. Macromol. Sci-Rev. Macromol. Chem v.C4 no.1 G. M. Estes;S. L. Cooper;A. V. Tobolsky
  3. J. Polym. Sci. v.8 J. A. Koutsky;N. V. Hien;S. L. Cooper
  4. J. Macromol. Sci. Phys v.B2 S. B. Clough;N. S. Schneider;A. O. King
  5. J. Appl. Polym. Sci v.10 S. L. Cooper;A. V. Tobolsky
  6. J. Macromal. Sci. Phys. v.B2 S. B. Clough;N. S. Schneider
  7. J. Macromal. Sci. Phys. v.B2 R. Bonart
  8. J. Macromol. Sci. v.B3 R. Bonart;L. Morbitzer;G. Hentze
  9. Macromolecules v.4 G. M. Estes;R. W. Seymour;S. L. Cooper
  10. Macromolecules v.6 R. W. Seymour;A. E. Allegrezza
  11. J. Polym. Sci. Part B v.46 R. W. Seymour;S. L. Cooper
  12. XXIII IUPAC Prepr. I. Kimura;H. Ishihara;H. Ono;N. Yoshihara;H. Kawai
  13. Macromolecules v.13 C. S. P. Sung;T. W. Smith;N. H. Sung
  14. Macromolecules v.18 C. S. Desper;N. S. Schneider;J. P. Jasinski;J. S. Lin
  15. Polymer Alloys Ⅲ C. S. Desper;N. S. Schneider;K. Frisch(ed.);D. Klemper(Ed.)
  16. Polymer v.32 S. Fakirov;C. Fakirov;E. W. Fischer;M. Stamm
  17. Polymer v.33 S. Fakirov;C. Fakirov;E. W. Fischer;M. Stamm
  18. Macromolecules v.30 N. Stribeck;D. Sapoundjieva;Z. Denchev;A. A. Apostolov;H. G. Zachmann;M. Stamm;S. Fakirov
  19. Polyurethane Elastomers C. Hepburn
  20. Colloid & Polymer Sci v.263 S. B. Lin;K. S. Hwang;S. Y. Tsay;S. L. Cooper
  21. Macromolecules v.27 H. S. Lee;N. W. Lee;K. H. Park;D. W. Ihm
  22. Macromolecules v.25 Y. Li;T. Gao;J. Liu;K. Linliu;C. R. Desper;B. Chu
  23. J. Polym. Sci. Polym. Phys. v.24 T. P. Russell;J. T. Koberstein
  24. Macromolecules v.19 J. T. Koberstein;T. P. Russell
  25. Makromol. Chem., Macromolecules. Symp. v.57 H. W. Siesler
  26. Makromol. Chem. v.50 D. Boese;C. D. Eisenbach;E. W. Fisher;H. Hayen;H. Nefzger;G. Planer-Keuhne;N. Reynolds;H. W. Spiess
  27. Macromolecules v.25 C. W. Meuse;X. Yang;D. Yang;S. L. Hsu
  28. Poly. J. (Tokyo) v.23 S. Kohjiya;Y. Ikeda;S. Yamashita;T. Kotami;S. Nomura
  29. J. Appl. Polym. Sci v.43 J. C. Moreland;G. L. Wilkes;R. B. Turner
  30. J. Macromol. Sci. Phys v.B22 V. A. Khranovski;L. P. Gul'ko
  31. Polym. Bull. (Berlin) v.9 H. W. Siesler
  32. Macromolecules v.14 C. S. P. Sung;C. B. Hu
  33. Macromol. Chem. Phys. v.195 N. Reynolds;H. W. Spiess;H. Hayen;H. Nefzger;C. D. Eisenbach
  34. Developments in Block Copolymer-1 I. Goodman
  35. J. Chem. Phys. v.24 R. D. B. Fraser
  36. J. Chem. Phys. v.21 R. D. B. Fraser
  37. J. Polym. Sci. Polym. Phys. v.195 J. Blackwell;J. R. Quay;M. R. Nagarajan;L. Born;H. Hespe
  38. Structure-Property Relations in Polymers M. W. Urban;C. D. Craver
  39. J. Appl. Polym. Sci. v.44 H. F. Hespe;A. Zembrod;F. J. Cama;C. W. Lantman
  40. J. Polym. Sci. Part B. Polym. Phys. v.32 H. S. Lee;S. L. Hsu
  41. Nature v.171 D. R. Homes;R. G. Miller;R. P. Palmer;C. W. Bunn
  42. J. Polym. Sci. v.15 A. Keller;I. Sandeman
  43. J. Polym. Sci. v.1 S. L. Aggarwal;G. P. Tilley;O. J. Sweeting
  44. J. Polym. Sci. v.58 S. Hoshino;J. Powers;D. J. Legrand;H. Kawai;R. S. Stein
  45. Nature v.173 R. G. Quynn;R. Steele
  46. J. Polym. Sci. v.22 G. Caroti;J. H. Dusenbury
  47. Spectrochim, Acta v.17 M. Tasumi;T. Shimanouchi
  48. Macromolecules v.25 Y. Li;T. Gao;J. Lin;K. Linliu;C. R. Desper;B. Chu
  49. J. Polym. Sci. v.24 P. E. Gibson;S. L. Cooper
  50. Macromolecules v.14 R. J. Roe;J. C. Chang
  51. Macromolecules v.13 C. S. P. Sung;C. B. Hu;C. S. Wu
  52. Introduction to Polymer(2nd Ed) R. J. Young;P. A. Lovell
  53. Elements of Z-ray Diffraction(2nd Ed) B. D. Cullity
  54. Br. Polym. J. v.20 A. J. Ryan;J. L. Standford;R. H. Still