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By Takuya Yamamoto, Takanori Fukushima, Takuzo Aida (auth.), Toshimi Shimizu (eds.)

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End Functionalization . . . . . . . . . . . . . 37 37 38 40 42 49 50 53 57 4 Conclusions . . . . . . . . . . . . . . . . . . 60 References . . . . . . . . . . . . . . . . . . . . 61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Abstract Block copolymer nanotubes are discrete cylindrical structures with a tubular core made from block copolymers.

Abstract Block copolymer nanotubes are discrete cylindrical structures with a tubular core made from block copolymers. The diameter of such cores should be below 100 nm, and the length of the tubes can be up to hundreds of micrometers or longer. This article discusses their preparation, dilute solution properties, and chemical reactions. 1 Introduction Block copolymer nanotubes in this chapter refer to discrete cylindrical structures with a tubular core diameter ranging from a few nanometers to 100 nm and a length-to-diameter aspect ratio substantially larger than 1.

The fact that the lP values that we determined from viscometry are comparable to those of the PEO-PI cylindrical micelles with similar core diameters again suggests the validity of the YFY theory in treating the nanofiber viscosity data. This study demonstrates that block copolymer nanofibers have dilute solution properties similar to those of semi-flexible polymer chains. Another property of semi-flexible polymer chains is the formation of nematic phases in concentrated solution. According to the theories of Onsager [73] and Flory [74], polymer chains with lP /dh > 6 should form a liquid crystalline phase above a critical concentration.

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