ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Aromatic polyesters and polyamides with disc-like mesogens in the main chain were prepared from tetra-substituted hydroquinones and derivatives of 1,4-phenylenediamine. Depending on the atomatic acids (terephthalic acid, 2,5-dialkoxyterephthalic acid) used in the condensation reaction, the repeating units of these polymers carried 4 or 6 lateral substitutents. All polymers are highly soluble in several organic solvents, e.g. CHCl3, toluene, acetone. The phase behaviour of the polymers was studied by means of differential scanning calorimetry and optical polarizing microscopy. Depending on the number of lateral substitutents the polyesters and polyamides show crystalline and thermotropic liquid-crystalline phases. X-ray investigations showed a board-like Packing of the rigid-rod polymers which we have termed as a “sanidic” (meaning board-like) phase.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1987.021880619
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