Self-assembled smectic phases in rod-coil block copolymers

Science

Volumn 273, Issue 5273, 1996, Pages 343-346

  Chen, J T ^a   Thomas, E L ^a   Ober, C K ^b   Mao, G P ^b  

^a Massachusetts Institute of Technology Cambridge   (United States)

^b Cornell University   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ELECTRON DIFFRACTION; MORPHOLOGY; ORGANIC POLYMERS; PHASE SEPARATION; POLYMERIZATION; TRANSMISSION ELECTRON MICROSCOPY; VOLUME FRACTION;

COIL-COIL BLOCK COPOLYMERS; MICROPHASE SEPARATION; ORIENTATIONAL ORDERING; POLYHEXYL ISOCYANATE B STYRENE; ROD COIL BLOCK COPOLYMERS; RODLIKE POLYMERS; SELECTED AREA ELECTOR DIFFRACTION; SELF ASSEMBLING POLYMERS; SMECTIC PHASES;

BLOCK COPOLYMERS;

COPOLYMER;

ARTICLE; DIFFRACTION; PRIORITY JOURNAL; PROTEIN ASSEMBLY; SEMICONDUCTOR; TRANSMISSION ELECTRON MICROSCOPY;

EID: 0013337810     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.273.5273.343     Document Type: Article

References (36)

1. G. H. Fredrickson and F. S. Bates, Annu. Rev. Phys. Chem. 41, 525 (1990).
2. L. Leibler, Macromolecules 13, 1602 (1980).
3. P. J. Flory, Proc. R. Soc. London Ser. A 243, 73 (1956).
4. Diblock and triblock rod-coil-(rod) studies are presented in the following references and discussed in (5): B. Perly, A. Douy, B. Gallot, Makromol. Chem. 177, 2569 (1976); A. Douy and B. Gallot, Polym. Eng. Sci. 17, 523 (1977); A. Nakajima, T. Hayashi, K. Kugo, K. Shinoda, Macromolecules 12, 840 (1979); S. Barenberg, J. M. Anderson, P. H. Geil, Int. J. Bol. Macromol. 3, 82 (1981); A. Douy and B. Gallot, Polymer 28, 147 (1987); L. H. Radzilowski, J. L. Wu, S. I. Stupp, Macromolecules 26, 879 (1993). An additional reference [L. H. Radzilowski and S. I. Stupp, ibid. 27, 7747 (1994)] discusses coil-rich diblocks that were found to form morphologies ranging from alternating strips to discrete aggregates.
5. Diblock and triblock rod-coil-(rod) studies are presented in the following references and discussed in (5): B. Perly, A. Douy, B. Gallot, Makromol. Chem. 177, 2569 (1976); A. Douy and B. Gallot, Polym. Eng. Sci. 17, 523 (1977); A. Nakajima, T. Hayashi, K. Kugo, K. Shinoda, Macromolecules 12, 840 (1979); S. Barenberg, J. M. Anderson, P. H. Geil, Int. J. Bol. Macromol. 3, 82 (1981); A. Douy and B. Gallot, Polymer 28, 147 (1987); L. H. Radzilowski, J. L. Wu, S. I. Stupp, Macromolecules 26, 879 (1993). An additional reference [L. H. Radzilowski and S. I. Stupp, ibid. 27, 7747 (1994)] discusses coil-rich diblocks that were found to form morphologies ranging from alternating strips to discrete aggregates.
6. Diblock and triblock rod-coil-(rod) studies are presented in the following references and discussed in (5): B. Perly, A. Douy, B. Gallot, Makromol. Chem. 177, 2569 (1976); A. Douy and B. Gallot, Polym. Eng. Sci. 17, 523 (1977); A. Nakajima, T. Hayashi, K. Kugo, K. Shinoda, Macromolecules 12, 840 (1979); S. Barenberg, J. M. Anderson, P. H. Geil, Int. J. Bol. Macromol. 3, 82 (1981); A. Douy and B. Gallot, Polymer 28, 147 (1987); L. H. Radzilowski, J. L. Wu, S. I. Stupp, Macromolecules 26, 879 (1993). An additional reference [L. H. Radzilowski and S. I. Stupp, ibid. 27, 7747 (1994)] discusses coil-rich diblocks that were found to form morphologies ranging from alternating strips to discrete aggregates.
7. Diblock and triblock rod-coil-(rod) studies are presented in the following references and discussed in (5): B. Perly, A. Douy, B. Gallot, Makromol. Chem. 177, 2569 (1976); A. Douy and B. Gallot, Polym. Eng. Sci. 17, 523 (1977); A. Nakajima, T. Hayashi, K. Kugo, K. Shinoda, Macromolecules 12, 840 (1979); S. Barenberg, J. M. Anderson, P. H. Geil, Int. J. Bol. Macromol. 3, 82 (1981); A. Douy and B. Gallot, Polymer 28, 147 (1987); L. H. Radzilowski, J. L. Wu, S. I. Stupp, Macromolecules 26, 879 (1993). An additional reference [L. H. Radzilowski and S. I. Stupp, ibid. 27, 7747 (1994)] discusses coil-rich diblocks that were found to form morphologies ranging from alternating strips to discrete aggregates.
8. Diblock and triblock rod-coil-(rod) studies are presented in the following references and discussed in (5): B. Perly, A. Douy, B. Gallot, Makromol. Chem. 177, 2569 (1976); A. Douy and B. Gallot, Polym. Eng. Sci. 17, 523 (1977); A. Nakajima, T. Hayashi, K. Kugo, K. Shinoda, Macromolecules 12, 840 (1979); S. Barenberg, J. M. Anderson, P. H. Geil, Int. J. Bol. Macromol. 3, 82 (1981); A. Douy and B. Gallot, Polymer 28, 147 (1987); L. H. Radzilowski, J. L. Wu, S. I. Stupp, Macromolecules 26, 879 (1993). An additional reference [L. H. Radzilowski and S. I. Stupp, ibid. 27, 7747 (1994)] discusses coil-rich diblocks that were found to form morphologies ranging from alternating strips to discrete aggregates.
9. Diblock and triblock rod-coil-(rod) studies are presented in the following references and discussed in (5): B. Perly, A. Douy, B. Gallot, Makromol. Chem. 177, 2569 (1976); A. Douy and B. Gallot, Polym. Eng. Sci. 17, 523 (1977); A. Nakajima, T. Hayashi, K. Kugo, K. Shinoda, Macromolecules 12, 840 (1979); S. Barenberg, J. M. Anderson, P. H. Geil, Int. J. Bol. Macromol. 3, 82 (1981); A. Douy and B. Gallot, Polymer 28, 147 (1987); L. H. Radzilowski, J. L. Wu, S. I. Stupp, Macromolecules 26, 879 (1993). An additional reference [L. H. Radzilowski and S. I. Stupp, ibid. 27, 7747 (1994)] discusses coil-rich diblocks that were found to form morphologies ranging from alternating strips to discrete aggregates.
10. Diblock and triblock rod-coil-(rod) studies are presented in the following references and discussed in (5): B. Perly, A. Douy, B. Gallot, Makromol. Chem. 177, 2569 (1976); A. Douy and B. Gallot, Polym. Eng. Sci. 17, 523 (1977); A. Nakajima, T. Hayashi, K. Kugo, K. Shinoda, Macromolecules 12, 840 (1979); S. Barenberg, J. M. Anderson, P. H. Geil, Int. J. Bol. Macromol. 3, 82 (1981); A. Douy and B. Gallot, Polymer 28, 147 (1987); L. H. Radzilowski, J. L. Wu, S. I. Stupp, Macromolecules 26, 879 (1993). An additional reference [L. H. Radzilowski and S. I. Stupp, ibid. 27, 7747 (1994)] discusses coil-rich diblocks that were found to form morphologies ranging from alternating strips to discrete aggregates.
11. J. T. Chen, E. L. Thomas, C. K. Ober, S. S. Hwang, Macromolecules 28, 1688 (1995).
12. M. N. Berger, J. Macromol. Sci. Rev. Macromol. Chem. C9, 269 (1973).
13. A. J. Bur and L. J. Fetters, Chem. Rev. 76, 727 (1976).
14. S. M. Aharoni, Macromolecules 12, 94 (1979).
15. _ and E. K. Walsh, ibid., p. 271.
16. S. M. Aharoni, J. Polym. Sci. Polym. Phys. Ed. 18, 1439 (1980).
17. S. B. Clough, in Characterization of Materials in Research Ceramics and Polymers, J. J. Burke and V. Weiss, Eds. (Syracuse Univ. Press. Syracuse, NY, 1975), pp. 417-436.
18. 1H nuclear magnetic resonance (NMR) spectroscopy.
19. 2, where M is the molecular weight of the PS block in grams per mole.
20. The observed tilt angle of the PHIC is determined not only by the packing requirement in the LC state but also by crystallization of the PHIC chains, which necessitates axial registry of the chain axis repeat unit and leads to quantization of the tilt angle [see (5) for further discussion).
21. w data.
22. w of the PS block is quite similar for HS58/7, HS245/9, and HS386/7, it is not surprising that, locally, the chain packing at the rod-coil interface gives approximately the same tilt angle for the rod block with respect to the normal to the PS layer (or the row of PS arrowheads).
23. A. M. Levelut, C. Germain, P. Keller, L. Liebert, J. Phys. (Paris) 44, 623 (1983).
24. A.
25. Y. Galerne and L. Liebert, Phys. Rev. Lett. 64, 906 (1990).
26. _, ibid. 66, 2891 (1991).
27. P. Hamelin, A. M. Levelut, P. Martinot-Lagarde, C. Germain, L. Liebert, J. Phys. II (Paris) 3, 681 (1993).
28. A. N. Semenov and S. V. Vasilenko, Sov. Phys. JETP 63, 1 (1986).
29. A. Halperin, Europhys. Lett. 10, 549 (1989).
30. _, Macromolecules 23, 2724 (1990).
31. E. Raphael and P. G. de Gennes, Physica A177, 294 (1991).
32. _, Makromol, Chem. Macromol. Symp. 62, 1 (1992).
33. D. R. M. Williams and G. H. Fredrickson, Macromolecules 25, 3561 (1992).
34. R. Holyst and M. Schick, J. Chem. Phys. 26, 730 (1992).
35. E. Gurovich, Macromolecules, in press.
36. w characterization of some of the rod-coils.