Fundamental Studies on Reactive Oligomers
Abstract
A new aromatic diamine, bis(4-(3-aminophenoxy)phenyl) sulfone (BAPS- 4,3) was prepared by hydrolysis of the precursor, bis(4-(3-acetamidophenoxy) phenyl) sulfone, whereas attempts to prepare the nitro-precursor of BAPS-4,3 from the chlorophenyl sulfone and sodium nitrophenoxide were unsuccessful. 4- Aminophthalonitrile was prepared in high purity by the catalytic reduction of 4- nitrophthalonitrile. A number of epoxide-terminated oligomeric aromatic polyimides (BTEP) series) were synthesized by the simple, direct reaction of amine-terminated oligomeric polyimides with epichlorohydrin in the presence of base. A number of cured products showed TGA inflection points in air in the 450- 490 C region. The peroxidation of a styrene-terminated oligomer yielded an epoxide-terminated oligomer (BTSO series) whose TGA value in air showed a break in the 350-400 C region, and inflection points in the 565-595 C region. A phthalonitrile-terminated oligomer (BTPN-1) was prepared using 4- aminophthalonitrile as the telomerizing fraction. A new polyimide, PI-25, based on BAPS-4,3 was prepared and its tractability and thermal behavior were similar to polyimides PI-17 and PI-20 based on 1,3-di(4-aminophenoxy) benzene (DAPB-3,3) .
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1974
- Accession Number
- ADB000043
Entities
People
- G. F. D'alelio
Organizations
- University of Notre Dame