苏小虎
,
梁伟
宇航材料工艺
doi:10.3969/j.issn.1007-2330.2015.05.003
树脂炭化是一个复杂的物理化学变化过程,包括传热传质、应力应变、热分解等耦合过程.基于物理守恒原理,理论推导出了瞬态的热-流-固耦合方程组,包括树脂变形方程、热解气体渗流方程和能量守恒方程,分析了各物理场之间的相互耦合作用,并对后续研究提出建议.
关键词:
碳/碳复合材料
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树脂
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炭化
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多场耦合
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控制方程
Xiaohua CHEN
,
Jing HU
材料科学技术（英）
Carbon nanotube (CNT)/maleic acid anhydride (MAH)-grafted polypropylene (PP) composites were prepared by in situ grafting method. Infrared spectroscopy showed that the CNTs were linked to PP by MAH grafting. The microstructures and calorimetry analysis indicated that the crystallization behaviors of the filled and unfilled PP were quite different. The addition of CNTs dramatically reduced the spherulite size, increased crystallization rate and improved the thermal stability of PP. These results confirmed the expected nucleant effect of CNT on the crystallization of PP. Scanning and transmission electron microscopy showed that the CNTs were dispersed homogeneously, indicating that the original CNT bundles were separated into individual tubes by the grafting.
关键词:
Carbon nanotubes
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