Morphology and Cure Behavior of Multi-walled Carbon Nanotubes-based Thermally Conductive Adhesive  

作　　者：王军霞 晏石林 HE Yunban YAN Fei XIE Beiping 

机构地区：[1]School of Science, Wuhan University of Technology [2]Guangzhou Yueneng Power Technology Development Co.Ltd

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2014年第3期451-454,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.51073125);the Fundamental Research Funds for the Central Universities

摘　　要：We evaluated the cure behavior of multi-walled carbon nanotubes （MWCNTs） based thermally conductive adhesive by comprehensively thermal analysis, which presented extremely complicated variability of conversion ratio a as a function of temperature with synergistic action of positive effect and negative volumeblocking effect of MWCNTs and cross-linked network of cured polymer molecules. Due to the decomposition of MWCNTs and degradation of polymer, the mass drop is dramatically obvious over the temperature range of 330-370 ℃. Binary resins filled with acid -treated MWCNTs present similar reaction interval as neat epoxy and matrix resins, which is distinct from the material filled with raw MWCNTs. The alteration of the crystalline temperature and cure temperature of resins is attributed to heterogeneous nucleation of MWCNTs in matrix resins. The --COOH group of acid-treated MWCNTs reacts with epoxy groups and thus generates cross-linking, accelerates the reaction rate and reduces the cure temperature.We evaluated the cure behavior of multi-walled carbon nanotubes （MWCNTs） based thermally conductive adhesive by comprehensively thermal analysis, which presented extremely complicated variability of conversion ratio a as a function of temperature with synergistic action of positive effect and negative volumeblocking effect of MWCNTs and cross-linked network of cured polymer molecules. Due to the decomposition of MWCNTs and degradation of polymer, the mass drop is dramatically obvious over the temperature range of 330-370 ℃. Binary resins filled with acid -treated MWCNTs present similar reaction interval as neat epoxy and matrix resins, which is distinct from the material filled with raw MWCNTs. The alteration of the crystalline temperature and cure temperature of resins is attributed to heterogeneous nucleation of MWCNTs in matrix resins. The --COOH group of acid-treated MWCNTs reacts with epoxy groups and thus generates cross-linking, accelerates the reaction rate and reduces the cure temperature.

关 键 词：ADHESIVE carbon nanotubcs thermal analysis DEGRADATION 

分 类 号：TB383.1[一般工业技术—材料科学与工程]