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Annealing of polyacene‐based oligomer synthesized under high pressure
Author(s) -
Kojima Yoshitusgu,
Matsuoka Takaaki,
Takahashi Hideroh
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19990110)71:2<289::aid-app12>3.0.co;2-l
Subject(s) - oligomer , annealing (glass) , diffraction , raman spectroscopy , raman scattering , materials science , conductivity , polymer chemistry , chemistry , analytical chemistry (journal) , crystallography , composite material , optics , organic chemistry , physics
A polyacene‐based oligomer was synthesized by reaction of diphenyldiacetylene under high pressure (pressure: 0.1 GPa; temperature: 250°C; time: 5 h). Annealing of the polyacene‐based oligomer was carried out (temperature: 300–800°C; time: 5 h). Gas analysis, BET surface area measurement, Raman scattering, X‐ray diffraction, elemental analysis, 13 C‐NMR, and conductivity measurements were performed to characterize the structure of the product. The oligomer was annealed with the appearance of mainly hydrogen. The H/C of the product decreased with increasing annealing temperature. The Raman band is observed at 1610 cm −1 assigned to a doubly degenerate deformation vibration of the carbon hexagonal ring. The additional band observed at 1340 cm −1 is attributed to the size effect. X‐ray diffraction indicated that the product had no sharp peak because of the disordered carbon structure. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 289–292, 1999