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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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碳纤维增强聚酰亚胺复合材料的碳化研究
Keywords: 复合材料,cf/pi碳化,结构变化,力学性能
Abstract:
？利用模压成型法制备了碳纤维增强聚酰亚胺复合材料(cf/pi),研究了不同碳化温度下,cf/pi复合材料的结构以及性能的变化规律。结果表明,500~800℃,热失重显著,对应亚酰胺环沿着c-n键断裂,先后发生脱羰基、脱氢反应。碳化后,分子处于无序态,力学性能大幅下降;800~1000℃,分子内官能团进行重组,900℃碳化后出现了表征碳材料(110)面的衍射峰,且力学强度达到最大值,复合材料的碳层结构逐渐形成。随着碳化温度的增加,基于聚酰亚胺与碳纤维的相互作用,复合材料的界面结合情况得到改善,且900℃碳化后,复合材料具有最佳综合性能。
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