Thermal characteristics and physicomechanical properties of polyimidates

Polycondensation of equimolecular quantities of bis-imidoyl chlorides with bis-phenols in the environment of organic solvents synthesized imino-analogues of polyarylate – polyimidate. The received polymers are soluble in amide solvents, solvents of phenolic type and tetrachloroethane, and have significant interval between temperature of plastic deformation and thermal stability that presents a good possibility of their processing to products by modern industrial methods. The mechanical durability of the film materials of polyimidates is 65–90 MPa, obviously expressed dependence of the deformation-strength parameters on the value of the molecular weight of the polymer is observed. Despite the fact that polyimidates are of interest as intermediate polymer intermediates in the synthesis of polyaramides, they have their own complex of high thermal and deformation-strength characteristics, which makes them promising as adhesives, film materials, fibers and laminated plastics. One of the most important in practical terms properties of film materials based on polyimidates is their proton conductivity after doping in a solution of phosphoric acid, which allows the use of these polymers as membranes in the design of fuel cells of hydrogen energy.

1. Mognonov, D.M., Tonevitsky, Yu.V., Ayurova, O.Zh., Ilyina, O.V., Kornopoltsev, V.N., Termicheskie kharakteristiki i fiziko-mekhanicheskie svoystva aromaticheskikh poliamidinov i materialov na ikh osnove [Thermal characteristics and physicomechanical properties of aromatic polyamidines and materials based on them], Voprosy Materialovedeniya, 2018, V. 96, No 4, pp. 151–159.

2. Böh me F., Kunert C., Klinger C., Ko mber H. Structural influences on the properties of aromatic polyamidines, Macromol. Symp., 1998, V. 128, pp. 183-193.

3. Kurita K., Kusaya ma Y., Iwakura Y. Polyadditions of bisketenimines. I. Syntesis of polyamidines from bisketenimines and diamines, J. Polym. Sci.: Polym. Chem. Ed., 1977, V. 15, No 9, pp. 2163.

4. Ogata S., Rarimoto M., Imai Y. Direct synthesis of new aromatic polyamidines from aromatic diamines and benzoic acids by using poly(trimethylsilylphosphate), Macromol. Chem., Rapid Commun, 1985, V. 6, No 12, pp. 835.

5. Petrova, T.D., Platonov, V.E., Reaktsii soyedineniy s galogenimidoil'nymi gruppirovkami [Reactions of compounds with haloimidoyl groups], Russ. Chem. Rev., 1988, V. 57, No. 3, pp. 405-433.

6. The Chemistry of Amidines and Imidates / Eds. S. Patai, Z. Rappoport, New York: John Wiley & Sons, 1991, 918 p.

7. Sokolov, L.B., Gerasimov, V.D., Savinov, V.M., Belyakov, V.K., Termostoykie aromaticheskie poliamidy [Heat-resistant aromatic polyamides], Moscow: Khimiya, 1975..

8. Potapov, V.I., Terentyev, A.P., K voprosu o tautomerii amidov [On the amid tautomerism], Doklady AN SSSR, 1960, V. 132, pp. 626–627.

9. Burdukovskii, V.F., Mognonov, D.M., Farion, I.A., Chapman rearrangement in the synthesis of aromatic polyamides, Polym. Sci. Part. A: Polym. Chem., 2007, V. 45, No 1, pp. 4656–4660.

10. Chapman, A.W., Imino-aryl ethers. Part V. The effect of substitution on the velocity of molecular rearrangement, J. Chem. Soc., 1927, pp. 1743–1751. DOI:10.1039/JR9270001743

11. Korshak, V.V., Tekhnologiya plasticheskikh mass [Plastics technology], Moscow: Khimiya, 1985.

12. Kataev, V.M., Popov, V.A., Sazhin, B.I., Spravochnik po plasticheskim massam [Handbook of plastics], Moscow: Khimiya, 1975.