ISSN:
0022-3832
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Physik
Notizen:
In a study of isomorphic behavior, it was found that the melting point - composition curve of the copolyamides prepared from caprolactam and p-aminomethylcyclohexylcarboxylic acid was sigmoidal, indicating that the methylcyclohexyl group was interchangeable in the crystal lattice with aliphatic carbon atoms of ω-aminocaproic acid. On the other hand, the benzyl group in the copolymers of caprolactam and p-aminomethylbenzoic acid did not interchange as well, and only partial isomorphism occurred. The analogous meta derivatives, m-aminomethylcyclohexylcarboxylic acid and m-aminomethylbenzoic acid, did not fulfill the spatial requirements of caprolactam. Although V-shaped melting point - composition curves resulted, the disturbance in the crystal network was more severe with the m-phenyl derivative than with the m-cyclohexyl derivative.
Zusätzliches Material:
3 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/pol.1961.1204915207
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