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Ageing of low-temperature coal tar pitch. 2. Influence of additives

✍ Scribed by Jürg E. Rüede


Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
422 KB
Volume
58
Category
Article
ISSN
0016-2361

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Ageing of low-temperature coal-tar pitch
✍ Jürg E. Rüede 📂 Article 📅 1979 🏛 Elsevier Science 🌐 English ⚖ 377 KB

Outdoor weathering or exposure to U.V. light causes chemical changes on the surface of pitch which can be studied with infrared spectroscopy. Several changes -increase of oxygen content and aromaticity -take place at the same time but at different rates. Carbonyl groups are formed considerably faste