Two-dimensional folded chain crystals of a synthetic polymer in a langmuir-blodgett film

Journal of the American Chemical Society

Volumn 127, Issue 16, 2005, Pages 5788-5789

  Kumaki, Jiro ^a   Kawauchi, Takehiro ^a   Yashima, Eiji ^a,b  

^a JAPAN SCIENCE AND TECHNOLOGY AGENCY   (Japan)

^b NAGOYA UNIVERSITY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

POLY(METHYL METHACRYLATE);

ARTICLE; ATOMIC FORCE MICROSCOPY; CHEMICAL ANALYSIS; CRYSTAL STRUCTURE; CRYSTALLIZATION; POLYMERIZATION; STRUCTURE ANALYSIS;

EID: 17744394727     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja050457e     Document Type: Article

References (17)

1. (a) Wunderlich, B. Macromolecular Physics; Academic Press: New York, 1973.
2. (b) Unger, G.; Zeng, X.-B. Chem. Rev. 2001, 101, 4157.
3. (a) Magonov, S. N.; Reneker, D. H. Annu. Rev. Mater. Sci. 1997, 27, 175.
4. (b) Magonov, N. S.; Whangbo, M.-H. Surface Analysis with STM and AFM; VCH: Weinheim, Germany, 1996.
5. (c) Magonov, N. S. Encyclopedia of Analytical Chemistry; Meyers, R. A., Ed.; John Wiley: Chichester, 2000; p 7432.
6. Gaines, G. L. Insoluble Monolayers at Liquid-Gas Interfaces; Interscience: New York, 1966.
7. Brinkhuis, R. H. G.; Schouten, A. J. Macromolecules 1991, 24, 1487.
8. Vilanove, R.; Rondelez, F. Phys. Rev. Lett. 1980, 45, 1502.
9. Vilanove, R.; Poupinet, D.; Rondelez, F. Macromolecules 1988, 21, 2880.
10. Henderson, J. A.; Richard, R. W.; Penfold, J.; Shackleton, C.; Thomas, R. K. Polymer 1991, 32, 3284.
11. de Gennes, P.-G. Scaling Concepts in Polymer Physics; Cornell University Press: Ithaca, NY, 1979; p 60.
12. An atactic PMMA showed a compressed type π - A curve and also formed an aggregated structure even when deposited from a dilute state, similar to st-PMMA. See: (a) Kumaki, J.; Nishikawa, Y.; Hashimoto, T. J. Am. Chem. Soc. 1996, 118, 3321. (b) Kumaki, J.; Hashimoto, T. J. Am. Chem. Soc. 2003, 125, 4907.
13. An atactic PMMA showed a compressed type π - A curve and also formed an aggregated structure even when deposited from a dilute state, similar to st-PMMA. See: (a) Kumaki, J.; Nishikawa, Y.; Hashimoto, T. J. Am. Chem. Soc. 1996, 118, 3321. (b) Kumaki, J.; Hashimoto, T. J. Am. Chem. Soc. 2003, 125, 4907.
14. The difficulty in observing chain foldings in all areas is probably due to the movements of the chains as a result of their amorphous nature and/or possible irregular structures. The regular sharp foldings observed here may be better visualized than irregular foldings due to the restricted motions and the regular structures. However, the exact structures of the chain folding in the invisible regions, including their regularity, are not clear at present. This characterization will be the objective of future studies.
15. Kusanagi, H.; Chatani, Y.; Tadokoro, H. Polymer 1994, 35, 2028 and references therein.
16. Kusanagi, H.; Tadokoro, H.; Chatani, Y. Macromolecules 1976, 9, 531.
17. Possible explanations for the agreement of the crystal parameter between the 2D and 3D crystals are (1) the chain-chain interaction is superior to the chain-substrate and chain-air interactions and (2) the 3D crystal of it-PMMA is close to ideal hexagonally closed-packed double helices. If a chain in a 3D crystal interacted in a different manner with the adjacent chains in the different crystal planes, the structure of the 2D crystal might be different from the 3D crystal; this might not be the present case.