In:
Journal of Polymer Science Part B: Polymer Physics, Wiley, Vol. 27, No. 8 ( 1989-07), p. 1749-1765
Abstract:
The mesomorphic transitions, crystallization from the mesophase, and the influence of the specimen preparation method on the solid‐state structure of an aromatic polyester containing a triad aromatic ester mesogenic group and a decamethylene flexible spacer in the main chain were studied by DSC, SALS, WAXS, polarizing microscopy, torsional braid analysis, and depolarizing transmittance techniques. The specimens obtained from solution were semicrystalline and exhibited nematic mesophase formation above the melting point T m , whereas the melt‐cast specimens were mesomorphic as cast. A transition from the nematic phase to another mesophase, designated M x , is proposed to occur below T m , so this transition is monotropic. It appears that the transition to the M x mesophase occurs before, and may even be a prerequisite for, crystallization of the melt‐cast specimens. The thermal expansion coefficient of the anisotropic melt is close to that of the isotropic melt, and the T g of the supercooled solid mesophase is close to that of the amorphous phase.
Type of Medium:
Online Resource
ISSN:
0887-6266
,
1099-0488
DOI:
10.1002/polb.09.v27:8
DOI:
10.1002/polb.1989.090270812
Language:
English
Publisher:
Wiley
Publication Date:
1989
detail.hit.zdb_id:
1473448-5
detail.hit.zdb_id:
233082-9
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