## Abstract Soluble and stable precursors of aromatic imidodiamines were prepared and employed in polymerization reactions with aromatic dianhydrides to yield poly(amic acid ester)s. Thermal imidization of the polymers produced strictly aromatic copolyimides. The reaction of pyromellitic dianhydrid
Synthesis and characterization of alternating copolyimides containing aliphatic spacers
β Scribed by C. V. Avadhani; S. P. Vernekar
- Publisher
- Springer
- Year
- 1990
- Tongue
- English
- Weight
- 283 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0170-0839
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## Abstract The bisphenols containing methylene spacer were prepared by treating eugenol/2βallyl phenol with 2,6βdimethyl phenol/guiacol/__o__βcresol in the presence of AlCl~3~. All the bisphenols were converted to their respective cyanate esters by treating with CNBr. The structural confirmation w
Random copolyimides with different proportions of a diamine component were prepared by polymerizing different compositions of diamines with various dianhydrides and imidized thermally to 260Β°C. The imidization percent of poly(amic acid) was characterized at various temperatures by infrared spectrosc