## Abstract Eight __s__βtriazineβcontaining polyimides were synthesized by solution polycondensation of diisocyanates having an __s__βtriazine ring with pyromellitic dianhydride in dimethylacetamide. Polyimides derived from __meta__βoriented diisocyanates were amorphous and soluble in dipolar aprot
Synthesis of fibre-forming aromatic polyimides containing oxadiazole rings in the chain
β Scribed by A. V. Tokarev; L. V. Chikurina; G. I. Kudryavtsev; A. I. Smirnova; G. D. Litovchenko
- Publisher
- Springer US
- Year
- 1972
- Tongue
- English
- Weight
- 204 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0015-0541
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Ten new aromatic polyamides containing s-triazine rings in the main chain were synthesized by the low temperature interfacial polycondensation technique involving the reactions of each of the two s-triazine containing diacylchlorides, viz., 2,4-bis (4-chlorocarbonylphenoxy)-6-methoxy-s-triazine and
Two chalcone-derivative isomers, 4,4-diaminochalcone ( 4DAC ) and 3,3diaminochalcone ( 3DAC ), were synthesized and used as monomers together with tetracarboxylic dianhydrides to prepare novel photosensitive polyimides that contain a chalcone moiety in the main chain. The polyimides were characteriz