Investigation of the role of the pyrimidine ring in the main chain of polyamido acids and polyimides. 1. Supermolecular structure of polypyromellitimides based on 2,5-bis(p-aminophenyl)pyrimidine and its carbocyclic analog 4,4?-diaminoterphenyl

Autor:	V. V. Kudryavtsev, V. P. Borovik, Yu. G. Baklagina, Oleg P. Shkurko, E. M. Nekrasova, V. N. Artem'eva, N. V. Lukasheva, V. P. Sklizkova
Rok vydání:	1992
Předmět:	chemistry.chemical_classification Pyrimidine Stereochemistry General Chemistry Polymer Ring (chemistry) Solvent chemistry.chemical_compound chemistry Automotive Engineering Polymer chemistry Molecule Layer (electronics) Polyimide Macromolecule
Zdroj:	Bulletin of the Russian Academy of Sciences Division of Chemical Science. 41:1790-1796
ISSN:	1573-9171 1063-5211
DOI:	10.1007/bf00863810
Popis:	A detailed comparative study of polypyromellitamido acids and polyimides based on 2,5-bis(paminophenyl)pyrimidine and 4,4′-diaminoterphenyl was conducted to determine the role of the nitrogencontaining pyrimidine ring in the main chain of the polymers. A model of the layer packing of polyimide chains in crystalline regions was proposed based on the data from x-ray structural analysis and quantum chemical calculations. The existence of tilted packing caused by partial displacement of the solvent molecules bound to the pyrimidine ring of the neighboring macromolecule with higher basicity in pyrimidine-containing polymers was hypothesized.
Databáze:	OpenAIRE
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