- Collection:
- Atlanta University and Clark Atlanta University Theses and Dissertations
- Title:
- The synthesis and characterization of processable precursor polymers to articulated polyfphenylene benzobisoxazoles containing the 2.5-disubstituted-1.4-bicyclor2.2 21 octyl ring system., 1995
- Creator:
- Akinseye, Temi Dayo
- Date of Original:
- 1995-08-01
- 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 precursor polymers to articulated poly(phenylene benzobisoxazoles), PBOs, have been prepared and studied. The precursor polymers were synthesized by the polycondensation of l,4-bicyclo[2.2.2]octyl-2,5-diethanoate dicarboxylic acid or 1,4- bicyclo[2.2.2]octyl-2,5-diol dicarboxylic acid with 3,3'-dihydroxy-4,4'-diaminobiphenyl or 2,2'-bis(3-amino-4-hydroxyphenyl)hexafluoropropane in poly(phosphoric acid), PPA. The precursor polymers were characterized by solubility, viscosity, spectroscopy (infrared, proton and carbon-13 NMR) and thermal analysis such as, differential scanning calorimetry, thermogravimetric analysis and optical polarizing microscopy. Thermogravimetic analysis (TGA) indicates that the precursor polymers are generally stable up to ca. 220� and 350� in air and under nitrogen atmosphere, respectively. Conversion of the precursor polymers to the more stable poly(phenylene benzobisoxazoles) is achieved by pyrolysis in air or under nitrogen atmosphere.
- External Identifiers:
- Metadata URL:
- http://hdl.handle.net/20.500.12322/cau.td:1995_akinseye_temi_dayo
- Rights Holder:
- Clark Atlanta University
- Holding Institution:
- Atlanta University Center Robert W. Woodruff Library
- Rights:
-
