ISSN:
0887-624X
Schlagwort(e):
thermotropic polyamides
;
polyethyleneglycol bis(4-carboxyphenyl)ether
;
p-phenylenediamines
;
4,4′-diaminobiphenyls
;
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
New thermotropic liquid crystalline polyamides were prepared from polyethyleneglycol bis(4-carboxyphenyl)ether (PEGn, n = 2, 3, 4) and aromatic diamines by using triphenyl phosphite in pyridine as the condensing agent. Substituted p-phenylenediamines and 4,4′-diaminobiphenyls were successfully used; melting points and isotropization temperatures of the polyamides were changed by the kind and number of the substituents. Copolymerization of long chain aliphatic dicarboxylic acids was carried out at the lower melting point of the copolymer. Kink monomers were also incorporated into the polymer backbone. © 1993 John Wiley & Sons, Inc.
Zusätzliches Material:
4 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/pola.1993.080311207
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