title: Study of the ordered structures of poly(styrene-b-vinyl4pyridine) in a solution state by using small-angle X-ray scattering and generalized indirect Fourier transform.
abstract: The structures of the mesophases and their subunits (micelles) of poly(styrene-b-vinyl4pyridine) (PS-b-P4VP) in a toluene solution were studied by using small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM), and generalized indirect Fourier transform (GIFT) methods. The structures of PS-b-P4VP, such as the individual micelle, the face-centered cubic (fcc) and body-centered cubic (bcc), and the lamellar, were identified. The SAXS from the PS-b-P4VP solution showed a good contrast for the micelle, even in a low concentration of 0.25 wt %. As the concentration increases, the fcc and both fcc and bcc appear for the packing of the micelles of PS(3.3K)-b-P4VP(4.7K) and PS(12K)-b-P4VP(11.8K), respectively. The lamellar structure was also identified, with a further increase in the concentration for PS(3.3K)-b-P4VP(4.7K). These structures were also identified via TEM images.
authors.affiliation: Department of Polymer Science, Kyungpook National University, #1370 Sangyuk-dong, Buk-gu, Daegu 702-701, Korea. psy@knu.ac.kr
authors.forename: Soo-Young
authors.initials: SY
authors.lastname: Park
authors.forename: Yun-Jeong
authors.initials: YJ
authors.lastname: Chang
authors.forename: B L
authors.initials: BL
authors.lastname: Farmer