INVESTIGATION OF THE ROLE OF THE PYRIMIDINE RING IN THE MAIN-CHAIN OFPOLYAMIDO ACIDS AND POLYIMIDES .1. SUPERMOLECULAR STRUCTURE OF POLYPYROMELLITIMIDES BASED ON 2,5-BIS(P-AMINOPHENYL)PYRIMIDINE AND ITS CARBOCYCLIC ANALOG 4,4'-DIAMINOTERPHENYL

Authors
ARTEMEVA VN KUDRYAVTSEV VV NEKRASOVA EM SKLIZKOVA VP BAKLAGINA YG LUKASHEVA NV SHKURKO OP BOROVIK VP
Citation
Vn. Artemeva et al., INVESTIGATION OF THE ROLE OF THE PYRIMIDINE RING IN THE MAIN-CHAIN OFPOLYAMIDO ACIDS AND POLYIMIDES .1. SUPERMOLECULAR STRUCTURE OF POLYPYROMELLITIMIDES BASED ON 2,5-BIS(P-AMINOPHENYL)PYRIMIDINE AND ITS CARBOCYCLIC ANALOG 4,4'-DIAMINOTERPHENYL, Bulletin of the Russian Academy of Sciences, Division of Chemical Sciences, 41(10), 1992, pp. 1790-1796
Citations number
16
Categorie Soggetti
Chemistry
Journal title
Bulletin of the Russian Academy of Sciences, Division of Chemical Sciences → ACNP
ISSN journal
10635211
Volume
41
Issue
10
Year of publication
1992
Part
1
Pages
1790 - 1796
Database
ISI
SICI code
1063-5211(1992)41:10<1790:IOTROT>2.0.ZU;2-S
Abstract
A detailed comparative study of polypyromellitamido acids and polyimid es based on 2,5-bis(p-aminophenyl)pyrimidine and 4,4-diaminoterphenyl was conducted to determine the role of the nitrogen-containing pyrimid ine ring in the main chain of the polymers. A model of the layer packi ng of polyimide chains in crystalline regions was proposed based on th e data from x-ray structural analysis and quantum chemical calculation s. The existence of tilted packing caused by partial displacement of t he solvent molecules bound to the pyrimidine ring of the neighboring m acromolecule with higher basicity in pyrimidine-containing polymers wa s hypothesized.