Observation of Cylinder-Based Microphase-Separated Structures from ABC Star-Shaped Terpolymers Investigated by Electron Computerized Tomography

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ID: 269507
2004
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Abstract
Characteristic cylindrical microphase-separated structures have been found for three ABC star-shaped terpolymers. The samples are composed of polystyrene (S), polyisoprene (I), and poly(2-vinylpyridine) (P); their volume ratios of I:S:P are about 1:1:0.7, 1:1:1.2, and 1:1:1.9, respectively, three components being connected at one branch point. From three-dimensional morphological observation by TEM combined with electron computerized tomography, a terpolymer with volume ratio of 1:1:0.7 shows honeycomb-type microdomain structure, i.e., (63), having three kinds of hexagonal cylinders arranged hexagonally with junction points being arrayed one-dimensionally at the intersection of three domains, while others show characteristic cylindrical structures with mainly 4-fold, (4.82), and 6-fold, (4.6.12), symmetry. It has been clarified, however, that many defects exist in the regular microdomain structures of all three terpolymers.
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Authors A. Takano,‡ S. Wada,† S. Sato,† T. Araki,† K. Hirahara,† T. Kazama,Seiichi Kawahara,† Y. Isono,§ A. Ohno,§ And N. Tanaka,Yushu Matsushita;A. Takano;‡ S. Wada;† S. Sato;† T. Araki;† K. Hirahara;† T. Kazama;Seiichi Kawahara;† Y. Isono;§ A. Ohno;§ And N. Tanaka;Yushu Matsushita;
Journal macromolecules
Year 2004
DOI
10.1021/ma048893t
URL
https://sciprofiles.com/publication/view/60bf4acfdc87d2f70d3400f90ead69ed
Keywords
structures fold cylinder abc terpolymers computerized microphase hexagonally characteristic cylindrical

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