INVESTIGATION OF THE ROLE OF THE PYRIMIDINE RING IN THE MAIN-CHAIN OFPOLYAMIDO ACIDS AND POLYIMIDES .2. CHARACTERISTICS OF THE THERMOCYCLIZATION OF POLYPYROMELLITAMIDO ACIDS BASED ON 2,5-BIS(P-AMINOPHENYL)PYRIMIDINE AND 4,4'-DIAMINOTERPHENYL

Authors
ARTEMEVA VN KUDRYAVTSEV VV NEKRASOVA EM SKLIZKOVA VP SHIBAEV LA STEPANOV NG SAZANOV YN FEDOROVA GN 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 .2. CHARACTERISTICS OF THE THERMOCYCLIZATION OF POLYPYROMELLITAMIDO ACIDS BASED ON 2,5-BIS(P-AMINOPHENYL)PYRIMIDINE AND 4,4'-DIAMINOTERPHENYL, Bulletin of the Russian Academy of Sciences, Division of Chemical Sciences, 41(10), 1992, pp. 1797-1800
Citations number
5
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
1797 - 1800
Database
ISI
SICI code
1063-5211(1992)41:10<1797:IOTROT>2.0.ZU;2-L
Abstract
The thermocyclization of polypyromellitamido acids based on 2,5-bis(p- aminophenyl)pyrimidine and 4,4'-diaminoterphenyl was investigated by t hermogravimetric and mass spectrometric analysis. Characteristics of t he thermocyclization of pyrimidine-containing polyamido acids due to t he presence of a basic nitrogen-containing ring in the main macrochain were revealed. The hypothesis advanced in Part 1, that the pyrimidine ring displaces solvent molecules bound to the polyamido acid, was con firmed. The hypothesis of the presence of shift packing in a pyrimidin e-containing polyamido acid was confirmed by its greater kinetic homog eneity in comparison with the completely aromatic analog.