Morphology and Cure Behavior of Multi-walled Carbon Nanotubes-based Thermally Conductive Adhesive
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2014年第3期
论文作者：王军霞 晏石林 HE Yunban YAN Fei XIE Beiping
文章页码：451 - 454
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 α 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 fi lled with acid-treated MWCNTs present similar reaction interval as neat epoxy and matrix resins, which is distinct from the material fi lled 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.
王军霞1，晏石林1，HE Yunban2，YAN Fei1，XIE Beiping1
1. School of Science, Wuhan University of Technology2. Guangzhou Yueneng Power Technology Development Co.Ltd
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 α 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 fi lled with acid-treated MWCNTs present similar reaction interval as neat epoxy and matrix resins, which is distinct from the material fi lled 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.
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