Structural anisotropy of poly(alkylthiophene) films

Aasmundtveit, K.E.Institutt for Fysikk, Norges Tekn.-Naturvitenskapelige U., N-7491 Trondheim, Norway (author)

The structural anisotropy of various poly(alkylthiophene) films have been studied by X-ray diffraction, using both conventional methods and synchrotron radiation at grazing incidence. Solution-cast films orient with the side chains preferably normal to the film surface, whereas spin-cast films of nonstereoregular material orient with both the main and the side chains in the film plane. For thick (10-50 µm) solution-cast films, the degree of orientation depends strongly on the solvent used for casting, and on the stereoregularity of the polymer, films of stereoregular materials being more oriented than those of nonregular materials. The most oriented nonregular films are those cast from mixtures of chloroform and tetrahydrofuran. Thin (50-500 nm) solution-cast films are more oriented than the thicker ones, and the effects of different stereoregularity or different casting solvents are small. For spin-cast films, the degree of orientation is independent of substrate and solvent. Spin-cast films of stereoregular material have two different phases: One with the side chains normal to the substrate, and another where they are parallel to the substrate. The diffraction peaks of spin-cast poly(octylthiophene) narrow considerably upon heating.

Samuelsen, E.J.Institutt for Fysikk, Norges Tekn.-Naturvitenskapelige U., N-7491 Trondheim, Norway (author)
Guldstein, M.Institutt for Fysikk, Norges Tekn.-Naturvitenskapelige U., N-7491 Trondheim, Norway (author)
Steinsland, C.Institutt for Fysikk, Norges Tekn.-Naturvitenskapelige U., N-7491 Trondheim, Norway (author)
Flornes, O.Institutt for Fysikk, Norges Tekn.-Naturvitenskapelige U., N-7491 Trondheim, Norway (author)
Fagermo, C.Institutt for Fysikk, Norges Tekn.-Naturvitenskapelige U., N-7491 Trondheim, Norway (author)
Seeberg, T.M.Institutt for Fysikk, Norges Tekn.-Naturvitenskapelige U., N-7491 Trondheim, Norway (author)
Pettersson, LarsLinköpings universitet,Tekniska högskolan,Institutionen för fysik, kemi och biologi(Swepub:liu)larpe20 (author)
Inganäs, OlleLinköpings universitet,Tekniska högskolan,Biomolekylär och Organisk Elektronik(Swepub:liu)ollin59 (author)
Feidenhans'l, R.Forskningscenter Risø, DK-4000 Roskilde, Denmark (author)
Ferrer, S.Europ. Synchrt. Radiation Facility, BP 220, F-38043 Grenoble Cedex, France (author)
Institutt for Fysikk, Norges Tekn.-Naturvitenskapelige U., N-7491 Trondheim, NorwayTekniska högskolan (creator_code:org_t)

In:Macromolecules: American Chemical Society (ACS)33:8, s. 3120-31270024-92971520-5835

By the author/editor: Aasmundtveit, K. ...; Samuelsen, E.J.; Guldstein, M.; Steinsland, C.; Flornes, O.; Fagermo, C.; show more...; Seeberg, T.M.; Pettersson, Lars; Inganäs, Olle; Feidenhans'l, R.; Ferrer, S.; show less...

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