ICCAS OpenIR
Electrical properties and structural characterizations of polyphenylquinoxaline pyrolyzed at high temperature
Piao, MJ; Wan, MX; Lu, FC
1998-07-05
Source PublicationJOURNAL OF APPLIED POLYMER SCIENCE
ISSN0021-8995
Volume69Issue:1Pages:123-128
AbstractInsulating polyphenylquinoxaline (PPQ) was converted into an electrical conductor by pyrolysis at high temperature in nitrogen. Room temperature conductivity was measured as a function of pyrolytic conditions, and it was found that it strongly depends on the pyrolytic temperature and time. A maximum of room temperature conductivity about 177 S cm(-1) for PPQ film pyrolyzed at 1200 degrees C for 1 h was obtained, which is 18 orders of magnitude greater than that of the original PPQ film. The current voltage (I-V) curve of pyrolyzed PPQ films follows Ohm's law characteristics of metals. Anisotropy in conductivity along and perpendicular to the surface of the film indicates the formation of a graphite-like structure in pyrolyzed PPQ films. The structure of the pyrolyzed PPQ films was investigated by elemental analysis, X-ray photoelectron spectroscopy spectra, X-ray diffraction, and scanning electron microscopic image. The electrical property and the structural characterizations suggest that the pyrolysis of PPQ films consists of two processes (i.e., carbonization and graphitization), and the critical temperature is at about 800 degrees C. During carbonization (T-p < 800 degrees C), some H, N, and O atoms are removed and the temperature dependence of conductivity of pyrolyzed PPQ film can be expressed by the three-dimensional Variable-Range Hopping (3-D VRH) model. During graphitization (T-p > 800 degrees C), most H, N, and O atoms are removed from the residue, and a polyconjugated structure forms in it. The temperature dependence of conductivity deviates somewhat from the 3-D VRH model and can befitted with a modified 3-D VRH model. (C) 1998 John Wiley & Sons, Inc.
KeywordPolyphenylquinoxaline Pyrolysis Electrical Conductor
Indexed BySCI
Language英语
WOS IDWOS:000073642500014
PublisherJOHN WILEY & SONS INC
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/74310
Collection中国科学院化学研究所
Corresponding AuthorWan, MX
AffiliationAcad Sinica, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Piao, MJ,Wan, MX,Lu, FC. Electrical properties and structural characterizations of polyphenylquinoxaline pyrolyzed at high temperature[J]. JOURNAL OF APPLIED POLYMER SCIENCE,1998,69(1):123-128.
APA Piao, MJ,Wan, MX,&Lu, FC.(1998).Electrical properties and structural characterizations of polyphenylquinoxaline pyrolyzed at high temperature.JOURNAL OF APPLIED POLYMER SCIENCE,69(1),123-128.
MLA Piao, MJ,et al."Electrical properties and structural characterizations of polyphenylquinoxaline pyrolyzed at high temperature".JOURNAL OF APPLIED POLYMER SCIENCE 69.1(1998):123-128.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Piao, MJ]'s Articles
[Wan, MX]'s Articles
[Lu, FC]'s Articles
Baidu academic
Similar articles in Baidu academic
[Piao, MJ]'s Articles
[Wan, MX]'s Articles
[Lu, FC]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Piao, MJ]'s Articles
[Wan, MX]'s Articles
[Lu, FC]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.