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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...
Resin B and C (separated from hexane insoluble-benzene soluble fraction of Akabira SRC) produced isotropic cokes after carbonization. The pretreatment of heteroatom removal followed by hydrogenation (two-staged pretreatment) was more effective in attaining the anisotropic textures of widely developed flow domain type from both resin B and C, than pretreatment with only hydrogenation. The analytical...
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