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Oriented Poly(dialkylstannane)s
Author(s) -
Choffat Fabien,
Fornera Sara,
Smith Paul,
Caseri Walter R.,
Breiby Dag W.,
Andreasen Jens W.,
Nielsen Martin M.
Publication year - 2008
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200701178
Subject(s) - materials science , tetrafluoroethylene , perpendicular , polymer , polarization microscopy , diffraction , ultimate tensile strength , composite material , alkyl , polarization (electrochemistry) , polyethylene , polymer chemistry , crystallography , optics , microscopy , organic chemistry , geometry , chemistry , mathematics , physics , copolymer
The inorganic (or ‘organometallic’) polymers poly(dibutylstannane), poly(dioctylstannane), and poly(didodecylstannane) have been oriented by shear forces, the tensile drawing of blends with polyethylene, and deposition from solution onto glass slides coated with an oriented, friction‐deposited poly(tetrafluoroethylene) (PTFE) layer. Orientation of the polystannanes has been examined by polarization microscopy, UV‐vis spectroscopy with polarized light, and X‐ray diffraction and their direction is found to depend on the length of the alkyl side groups and the method of orientation. Remarkably, in some cases the polystannane backbones are oriented parallel and in other instances perpendicular to the direction of the external orientation stimuli. The latter structural arrangement is most conspicuous for polymers substituted with dodecyl side groups, which are found to align parallel to the applied orientation direction, which forces the polymer backbone into a perpendicular position. Finally, UV‐vis spectra indicate that changes in the backbone conformation of certain polystannanes might be induced by applying mechanical stress.