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Carbonization Treatment on Performance of Carbon Fibre Reinforced Polyimide Composite Materials |
Yujie KOU,Yongan NIU,Jiupeng ZHAO,Junkai LIU,Yao LI( ) |
Centre for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080 |
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Cite this article:
Yujie KOU,Yongan NIU,Jiupeng ZHAO,Junkai LIU,Yao LI. Carbonization Treatment on Performance of Carbon Fibre Reinforced Polyimide Composite Materials. Chinese Journal of Materials Research, 2014, 28(8): 573-578.
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Abstract A carbon fiber reinforced polyimide composite material (CF/PI) was prepared by compression molding. Then the effect of carbonization treatment on the change of structure and property of CF/PI was studied. The results show that the weight loss of CF/PI is obvious during carbonization treatment at temperature from 500℃ to 800℃, implying the occurrence of the rupture of imides rings along C-N bonds, i.e. reactions of dehydroxylation and dehydrogenation occur successively. After carbonization, molecules of CF/PI are in a state of disorder, thus its mechanical performance falls sharply; at temperature from 800℃ to 1000℃, with the recombination of functional groups within molecules, carbon layer structure forms gradually in the composite, while the characteristic diffraction peak (110) of carbon may be detected and correspondingly the mechanical strength reaches the maximum for the composite carburized at 900oC. The interfacial bond of the composite is enhanced with the increasing carbonization temperature, which is resulted from the heat activated interaction of polyimide with carbon fiber. The best comprehensive performance can be obtained for the CF/PI after carbonization treatment at 900℃.
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Received: 16 January 2014
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