COMPARATIVE STUDY OF POLYPYROMELLITIMIDES OBTAINED BY VARIOUS METHODS

[21] Vinogradova S. V., 1966, VYSOKOMOL SOEDIN, V8, P809

[22] VINOGRADOVA SV, 1964, Patent No. 171552

[23] VINOGRADOVA SV, 1966, Patent No. 215493

[24] WALLACH ML, 1967, POLYM PREPRINTS, V8, P1170

[25] WALLACH WL, 1965, POLYMER PREPRINTS, V6, P52

[21] Vinogradova S. V., 1966, VYSOKOMOL SOEDIN, V8, P809

[22] VINOGRADOVA SV, 1964, Patent No. 171552

[23] VINOGRADOVA SV, 1966, Patent No. 215493

[24] WALLACH ML, 1967, POLYM PREPRINTS, V8, P1170

[25] WALLACH WL, 1965, POLYMER PREPRINTS, V6, P52