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Synthesis, structure and properties of carbon nanotube/poly( p ‐phenylene benzobisoxazole) composite fibres
Author(s) -
Li Jinhuan,
Chen Xiangqun,
Li Xia,
Cao Hailin,
Yu Hongyan,
Huang Yudong
Publication year - 2006
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1998
Subject(s) - materials science , carbon nanotube , composite number , composite material , poly(p phenylene) , polymerization , spinning , ultimate tensile strength , dispersion (optics) , in situ polymerization , fourier transform infrared spectroscopy , nanotube , chemical engineering , polymer , physics , optics , engineering
Carbon nanotube/poly( p ‐phenylene benzobisoxazole) (CNT/PBO) composite fibres were prepared by in situ polymerization and dry‐jet wet spinning. The structure and properties of the CNT/PBO fibres were investigated. FTIR and viscosity measurements showed that the functional groups on the CNT surface took part in the polymerization and affected the chemical structure and molecular weight of the composite. CNT/PBO composites with high molecular weight could be obtained by controlling the amount and addition time of CNTs. Compared with PBO fibres containing no CNTs prepared under the same conditions, the thermal resistance of the CNT (2 wt%)/PBO fibres was higher and the tensile strength was also improved by 20–50%. WAXD and SEM measurements indicated that the orientation degree of the CNT (2 wt%)/PBO fibres was smaller than that of PBO fibres. The fracture surfaces of these two fibres were also different. CNT dispersion in the CNT (2 wt%)/PBO fibres was examined by TEM. A model of the interactions between CNTs and PBO is proposed, based on these results. Copyright © 2006 Society of Chemical Industry