ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Poly(ester-imide)s with a regular sequence of aliphatic spacers and aromatic imide mesogens were prepared in two ways. Either aliphatic α,ω-diacids were condensed with an acetylated diphenol derived from 4-hydroxyphthalic acid and 4-aminophenol, or aliphatic α,ω-diacid dichlorides were condensed with the silylated diphenol. The resulting poly(ester-imide)s were characterized by elemental analyses, viscosity measurements, microscopy under polarized light, DSC- and WAXS measurements. All poly(ester-imide)s are crystalline materials with a layered supermolecular structure in the solid state. Above the melting point a nematic mesophase exists over a broad temperature range. A pronounced odd-even effect was found for the temperature of isotropization, but not for the melting points.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1990.021910309
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