Study of the AlCl3 Catalytic Activity on Aromatic Hydrocarbons. Pt. 2. Mesophase Formation

When naphthalene is carbonized in the presence of AlCl3, polymerization and disproportionization reactions may occur up to approx 300 deg C. Further temperature rise causes additional processes accompanied by hydrogen evolution. Mesophase formation is accomplished at relatively low temperatures. Aft...

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Bibliographic Details
Published in:Carbon (New York) 1981-01, Vol.19 (5), p.341-346
Main Authors: Rey Boero, J F, Wargon, J A
Format: Article
Language:English
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Summary:When naphthalene is carbonized in the presence of AlCl3, polymerization and disproportionization reactions may occur up to approx 300 deg C. Further temperature rise causes additional processes accompanied by hydrogen evolution. Mesophase formation is accomplished at relatively low temperatures. After catalyst removal the observed mesophase appears stable over a wide temperature interval. Unusually low C/H ratios, and high aliphatic H contents were observed in the mesophase. These properties are probably responsible for the solubility behavior in conventional solvents. The processes < 300 deg C may lead to the formation of high molecular weight, nearly planar molecules which contain fully aromatic and tetralin-like rings in their structures. These molecules would then be able to enter into a stacking process leading to the mesophase formation. 12 ref.--EAA/AF.
ISSN:0008-6223