Carbonization of methylene-bridged aromatic oligomers—Effect of alkyl substituents

Methylene-bridged oligomers were prepared from naphthalene, tetralin, biphenyl, and their alkyl-substituted homologues and carbonized under an atmospheric pressure. The carbonization properties of oligomers were improved by alkyl groups to give anisotropic mesophase. The structural changes of the ol...

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Bibliographic Details
Published in:Carbon (New York) 1995, Vol.33 (5), p.625-631
Main Authors: Ida, T., Akada, K., Okura, T., Miyake, M., Nomura, M.
Format: Article
Language:English
Subjects:
anisotropy
Applied sciences
Carbonization
Chemical reactions and properties
Degradation
Exact sciences and technology
mesophase alkyl aromatics
Organic polymers
Physicochemistry of polymers
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Summary:Methylene-bridged oligomers were prepared from naphthalene, tetralin, biphenyl, and their alkyl-substituted homologues and carbonized under an atmospheric pressure. The carbonization properties of oligomers were improved by alkyl groups to give anisotropic mesophase. The structural changes of the oligomers suggested that radicals formed from alkyl groups would accelerate the condensation reactions of oligomers and that the conversion of alkyl carbons, as well as methylene carbons, into aromatic carbons resulted in growth of the aromatic systems.
ISSN:0008-6223
1873-3891
DOI:10.1016/0008-6223(94)00148-S