Solid-State 13C NMR Study of Pyrolytic Materials of Para-Cresol-formaldehyde Resin

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (7): 1102.

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Solid-State ¹³C NMR Study of Pyrolytic Materials of Para-Cresol-formaldehyde Resin

XIE De-Min, ZHANG Jian-Guo, WANG Cun-Guo, WANG Rong-Shun

Department of Chemistry, Northeast Normal University, Changchun, 130024

Received:1993-07-07 Revised:1993-12-12 Online:1994-07-24 Published:1994-07-24

Abstract

Abstract: ¹³C high-resolution solid-state NMRstudy has been performed with respect to polyacenic materials which were prepared by pyrolytic treatment of para-cresol-formaldehyde resin at different temperatures, The results show that with the increase of pyrolysis temperature, as the reaction of intermolecular dehydration and intramolecular dehydrogenation take place, a greater condensed aromatic ring is formed, so the chemical shifts exhibit an up-field shift.When the pyrolytic temperature reaches 900-1100℃, the main peak is composed of a group spectral lines continuously.This change can not be a chemical shift, it seems to be a Knight shift.

Key words: Para-cresol-formaldehyde resin, Pyrolysis, Solid-state ¹³C NMR

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XIE De-Min, ZHANG Jian-Guo, WANG Cun-Guo, WANG Rong-Shun. Solid-State ¹³C NMR Study of Pyrolytic Materials of Para-Cresol-formaldehyde Resin[J]. Chem. J. Chinese Universities, 1994, 15(7): 1102.

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Solid-State ¹³C NMR Study of Pyrolytic Materials of Para-Cresol-formaldehyde Resin

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