X-Ray Diffraction Studies of Pyrolytic Products of Phenol-Formaldehyde Resins

Abstract

Abstract: X-ray diffraction method has been used to study pristine and doped polyacenic semiconduc-tive materials prepared by pyroiytic treatment of phenol-formaldehyde (PF) and paracresol-formalde-hyde (PCF) resins. The results show that pyroiytic products of PFdisplay a polycrystalline structure and the interlayer distance is shortened with increasing T_P. The pristine samples obtined by pyrolysis of PFresin containing ZnCl₂in advance are amorphous, ZnCl₂plays a role of porous structure formation , increasing specific surface area and the values of d_cin all iodine-doped samples are increased in comparison with those of the pristine samples. The pristine samples obtained by pyrolysis of PCF resin show also amorphous structure but the value of d_cdoes not change significantly.

Key words: Polyacene, X-ray diffraction, Phenol-formaldehyde resins, Paracresol-formaldehyde resins

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Xie De-min, Wang Rong-shun, Zhang Xi-yan, Fu Yu-jie, Wang Cun-guo, Zhao Cheng-da, Mu Zhong-cheng. X-Ray Diffraction Studies of Pyrolytic Products of Phenol-Formaldehyde Resins[J]. Chem. J. Chinese Universities, 1991, 12(8): 1122.

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X-Ray Diffraction Studies of Pyrolytic Products of Phenol-Formaldehyde Resins

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