98/00351 Rheological properties of coal-tar pitches
- Publisher
- Elsevier Science
- Year
- 1998
- Weight
- 196 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0140-6701
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The viscosity of coal-tar pitch (CTP) mixtures with pulverulent graphite was determined between 100 and 180Β°C. The pitch precursor viscosity dependence on temperature obeys an equation proposed by Williams, Landel and Ferry (WLF equation), whose coefficients could be qualitatively related to the che
A commercial impregnating coal-tar pitch was air-blown at 275Β°C for 10, 18, 25 and 30 hours. Isotropic pitches were produced with softening points ranging from 140 to 210Β°C. The parent and treated pitches were characterized by elemental analysis, Fourier transform infrared, solubility in toluene and
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