- Collection:
- Atlanta University and Clark Atlanta University Theses and Dissertations
- Title:
- Synthesis and characterization of high performance polyimides containing the bicyclo[2.2.2]oct-7-ene ring system, 1996
- Creator:
- Alvarado, Migdalia
- Date of Original:
- 1996-12-01
- Subject:
- Degrees, Academic
Dissertations, Academic - Location:
- United States, Georgia, Fulton County, Atlanta, 33.749, -84.38798
- Medium:
- theses
- Type:
- Text
- Format:
- application/pdf
- Description:
- Processable polyimides containing the bicyclo[2.2.2]oct-7-ene ring system were prepared. The polyimides were synthesized by the polycondensation of bicyclo[2.2.2]oct- 7-ene-2,3,5,6-tetracarboxylic dianhydride with 1,4-phenylenediamine, 1,3- phenylenediamine, 3,3'-dimethyl-4,4'-diaminobipheny 1 diamine (o-tolidine), and 2,2'- bis(trifluoromethyl)benzidine in 1 -methyl-2-pyrrolidinone (NMP). The respective polyamic acids were also isolated. All the polyamic acids and polyimides were characterized by infrared, proton and carbon-13 nuclear magnetic resonance (NMR) spectroscopy, viscosity, solubility, and X-ray scattering. The polymers exhibited enhanced solubility in organic solvents such as dimethylsulfoxide (DMSO), N,N-dimethylacetamide (DMAc) and N,N-dimethylformamide (DMF). Thermal stability of the polyamic acids and polyimides were determined by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and optical polarizing microscopy. Thermogravimetric analysis indicates that the corresponding polyamic acids and polyimides are stable up to ca. 450 �C under argon and air atmospheres.
- External Identifiers:
- Metadata URL:
- http://hdl.handle.net/20.500.12322/cau.td:1996_alvarado_migdalia
- Rights Holder:
- Clark Atlanta University
- Holding Institution:
- Atlanta University Center Robert W. Woodruff Library
- Rights:
-
