𝔖 Bobbio Scriptorium
✦   LIBER   ✦

220. Developing of techniques for characterizing pitch chemistry

✍ Scribed by W.G. Bradshaw; J.G. Moncur


Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
128 KB
Volume
22
Category
Article
ISSN
0008-6223

No coin nor oath required. For personal study only.

✦ Synopsis


Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, NY 12181, U.S.A.).

Mass spectra of the species evolved during flash pyrolysis of pitches will be presented. Distinct differences in mass spectra were noted for the different feedstocks. Limitations of the technique will be discussed. For the toluene insolubles of A-240 pitch, significant quantities of naphthalene and anthracene and their methyl monosubstituted variants were observed.

Studies on pitch pyrolysis by combined thermogravimetric and gaschromatographic analysis


πŸ“œ SIMILAR VOLUMES


214. H NMR technique for characterizatio
✍ R.A. Greinke πŸ“‚ Article πŸ“… 1984 πŸ› Elsevier Science 🌐 English βš– 124 KB

The direct measurements of the principal thermal expansion coefficients were carried out for the specimens of pyrolytic graphite at temperatures between 50 and 55O"C, using an apparatus with high sensitivity. Resolving power of the apparatus was f 100 A. The c-axis thermal expansion coefficient was

Suitability of thermogravimetry and diff
✍ Amelia MartΓ­nez-Alonso; Jenaro Bermejo; Marcos Granda; Juan M.D. TascΓ³n πŸ“‚ Article πŸ“… 1992 πŸ› Elsevier Science 🌐 English βš– 790 KB

The pyrolysis of a number of coal tar and petroleum pitches was studied by means of thermogravimetry, derivative thermogravimetry and differential thermal analysis (DTA). Acenapthylene was used as a model compound to interpret the results of pitch pyrolysis. DTA exo-and endothermal peaks were assign

1H n.m.r. technique for characterization
✍ Ronald A. Greinke πŸ“‚ Article πŸ“… 1984 πŸ› Elsevier Science 🌐 English βš– 554 KB

A new proton n.m.r. technique has been developed for the chemical characterization of polymerized petroleum pitches with pyridine-insoluble contents as high as 80%. The polymerized pitches were completely solubilized for conventional 1 H n.m.r. evaluation in a mixed solvent system consisting of S$&-