TIT# Investigations of strained S-B-S block copolymers with dilute elastic
     networks
AUT# Stribeck, N.; Polizzi, S.; Bösecke, P.; Zachmann, H. G.
SOU# Rev. Roumaine Chem. (1989), 34(2), 635-648
LOC# xv005  @selbst.ftx
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ABS# Spin cast films of one pure and two oil extended SBS samples are observed
     under first cycle straining in the synchrotron radiation beam at HASYLAB.
     A scattering curve is extracted by intersecting the scattering pattern
     in drawing direction. This scattering curve is analyzed by fitting a
     one-dimensional fibrillar two-phase model. Essential to a fit with
     parameters of physical sense is the assumption of at least two
     components. One of the two main components is identified by fibrils
     containing PS cylinders oriented parallel to strain, the other by such
     containing cylinders oriented perpendicular. Splitting of cylinder
     orientation in the drawn state seems to be essential to the mechanical
     properties of the thermoplastic rubber, since only those cylinders
     oriented with their axis in the direction of strain are rigid while those
     oriented cross to drawing direction are yielding. The amount of cylinders
     alotted to each of the two components is varying as a function of the
     diluting agent and appears mainly to be influenced by topological
     parameters: the cylindrical particle dimensions within a two-dimensional
     pseudo lattice cell of slightly varying dimensions in longitudinal and
     cross cylinder direction respectively. While paraffinic mineral oil
     dilution causes the cylinders length to decrease and thus improves
     cylinder orientability within the pseudo lattice cell, aromatic oil
     dilution increases the particles diameter. The results are compared with
     those of a preceding study, which allowed determination of the degree
     of phase separation by absolute SAXS and with first TEM micrographs.