open access

https://hdl.handle.net/2115/79394

Properties and Molecular Structure of Pitches Produced in Air-Blowing Reaction

日本語

ESR

1994-05-28

炭素材料学会

TANSO

1994(162)

78-83

In order to investigate the roles of oxygen, heat and distillation in air-blowing reaction, the polymerization of a coal tar pitch in oxygen reaction, heat-treated reaction and distillation were studied by observing the molecular structures of the material pitches and product pitches with NMR and ESR measurements. It was found that the oxygen reaction was most effective to raise the softening point of the product pitches. This can be mainly ascribed to the polymerization with biphenyl-type bonding and the suppression of the pyrolysis of material in the reaction. On the other hand, the heattreated reaction without oxygen proceeded to the formation of larger peri-condensed aromatics which gave rise to anisotropy of pitches. The distillated pitch increased methylenic bonding between two aromatics in molecule which gave lower molecular orientation.

学術雑誌論文

Version of Record

著作権は炭素材料学会にある、利用は著作権の範囲内に限られる

0371-5345

1884-5495

AN00140335