Polyimides of different structures were synthesized by reaction of 1,4phenylene diisocyanate (PPDI) and 1,5-naphthalene diisocyanate (NDI) with pyromellitic dianhydride (PMDA) and 3,3Ј,4,4Ј-benzophenonetetracarboxylic dianhydride (BTDA). Polyamide-imides were also prepared by reaction of PPDI and ND
Ultraviolet stability of polyimides and polyamide–imides
✍ Scribed by W. M. Alvino
- Publisher
- John Wiley and Sons
- Year
- 1971
- Tongue
- English
- Weight
- 679 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0021-8995
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Mixed aromatic/alicyclic polyimides were prepared by polycondensation reactions of trans-1,4-cyclohexane diisocyanate (CHDI) with pyromellitic dianhydride (PMDA), benzophenonetetracarboxylic dianhydrid (BTDA), and hexafluoroisopropylidene diphthalic anhydride (6FDA). Also, polycondensation of CHDI w
A novel spirobichroman unit containing dietheramine, 6,6-bis(4-aminophenoxy)-4,4,4,4,7,7-hexamethyl-2,2 -spirobichroman ( 3), was prepared by the nucleophilic substitution of 6,6-dihydroxy-4,4,4 ,4,7,7-hexamethyl-2,2 -spirobichroman with p-chloronitrobenzene in the presence of K 2 CO 3 followed by h