S. Demoustierchampagne et al., POLY(METHYLPHENYL) SILANE - STRUCTURAL-PROPERTIES, Journal of polymer science. Part B, Polymer physics, 35(11), 1997, pp. 1727-1736
The physical structure of poly(methylphenyl)silane (PMPS) has been inv
estigated using wide-angle x-ray scattering at various temperatures an
d optical polarizing microscopy. The results obtained by these techniq
ues clearly show the existence of an ordered phase in PMPS. The crysta
llinity of our sample was estimated to be about 10% at room temperatur
e. Below 190 degrees C, the atactic chains pack into a monoclinic crys
talline lattice of near hexagonal symmetry, with two types of disorder
existing in the packing. At about 190 degrees C, a phase transition t
o a liquid crystalline columnar hexagonal packing (D-ho) occurs. Final
ly, the sample melts into an isotropic amorphous phase. (C) 1997 John
Wiley & Sons, Inc.