The role of the pyrimidine ring in the main chain of polyamic acids and polyimides |
| |
| Authors: | V. N. Artem'eva V. V. Kudryavtsev E. M. Nekrasova V. P. Sklizkova N. G. Belnikevich L. M. Kaluzhnaya I. G. Silinskaya O. P. Shkurko V. P. Borovik |
| |
| Affiliation: | 1. Institute of Macromolecular Compounds, Russian Academy of Sciences, 31 Bolschoi prosp., 199004, St. Petersburg, Russian Federation
2. Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 9 prosp. Akad. Lavrent'eva, 630090, Novosibirsk, Russian Federation
|
| |
| Abstract: | A comparative study of the behavior of polypyromellitamic acids based on 2,5-bis(p-aminophenyl)pyrimidine and 4,4″-diaminoterphenyl in concentrated dimethylacetamide solutions was carried out by the light-scattering method. It was shown that mutual ordering of the scattering elements is much higher for the pyrimidine-containing polyamic acids than for benzenoid polyamic acids. The Flory-Huggins parameters of the polymer-solvent interaction thus determined indicate that the polymer-polymer interactions increase when a pyrimidine ring is introduced into the polyamic acid or polyimide. Hence, the hypothesis postulating that the amide solvent is displaced by the pyrimidine ring during the shear packing of pyrimidine-containing polymers is confirmed. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
