文献类型：期刊文献

英文题名：Electron paramagnetic resonance of poly(benzazole)s and conducting properties of N⁺-implanted poly(benzazole)s

作者：Wang, SF; Wu, PP; Han, ZW

机构：[1]E China Univ Sci & Technol, Dept Polymer Sci & Engn, Shanghai 200237, Peoples R China

年份：2001

卷号：42

期号：1

起止页码：217

外文期刊名：POLYMER

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000089548700025)】；

语种：英文

外文关键词：electron paramagnetic resonance; poly(benzazole)s; ion-implantation

摘要：We present electron paramagnetic resonance (EPR) studies of the magnetic defect in poly(benzazole)s (including poly(p-phenylene benzobisthiazole) (PBZT), poly(p-phenylene benzobisoxazole) (PBO), poly(2,5-benzoxazole) (ABPBO), PBO-ABPBO and poly(1,4-phenylene benzobisoxazole-co-dimethylene benzobisoxazole) (PBO-PBOC2)) and the model compounds. Temperature dependence of the EPR spectra of poly(benzazole)s over the range 100-300 K and the effect of heat-treatment temperature on EPR parameters were also discussed. FeCl3. 6H(2)O-doped PBZT was investigated in its EPR signals. The results of analyses of the detailed lineshapes and linewidths were discussed in terms of the soliton-antisoliton, polaron and bipolaron model of the magnetic defect. After that, the conductivity studies and Raman characterization of N+-implanted PBZT and PBO were reported. The room-temperature conductivity of these implanted polymers, approximately 0.1-10 S cm(-1), is significantly higher than that of pristine polymers. It was revealed through Raman spectrum that the conductivity was attributed partially to the graphite laminar formed in the process of ion-implantation. The results of these studies contribute toward an identification of the origin and nature of the paramagnetic centers in poly(benzazole)s and toward an understanding of the charge transport mechanism. (C) 2000 Elsevier Science Ltd. All rights reserved.