• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polymer Degradation and Stability >Effect of carbon nanotubes and their dispersion on thermal curing of polyimide precursors
【24h】

Effect of carbon nanotubes and their dispersion on thermal curing of polyimide precursors

机译：碳纳米管及其分散对聚酰亚胺前体热固化的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The process of thermal imidization reaction is significant for temperature and time control in the polyimide industry. Here, we report the effect of carbon nanotubes and their states of dispersion on the thermal imidization of the precursor films of polyimide (poly(amic acid)) for the first time. The curing process was followed by measuring Fourier transform-infrared (FT-IR) spectra, fluorescence spectra, thermogravi-metric-differential scanning calorimeter (TG-DSC) properties and the refractive indices of films. It was found that by evenly dispersing 1 wt% of carbon nanotubes assisted by a dispersant in the poly(amic acid), the full imidization temperature of the polyimide can be reduced from 300 ℃ to 250 ℃. Different states of distribution of CNTs were observed by light microscopy and scanning electron microscopy, and proved that a better dispersion of carbon nanotubes dramatically enhanced the speed of imidization. Moreover, the DSC results showed that lower decomposition temperature of poly(amic acid) could be obtained with more uniform distribution of carbon nanotubes, which means the process of cyclodehydration of the poly (amic acid) was accelerated.
机译：热酰亚胺化反应的过程对于控制聚酰亚胺工业中的温度和时间很重要。在这里，我们首次报道了碳纳米管及其分散状态对聚酰亚胺（聚酰胺酸）前体膜热酰亚胺化的影响。在固化过程之后，测量傅立叶变换红外（FT-IR）光谱，荧光光谱，热重-差示扫描量热仪（TG-DSC）性质和薄膜的折射率。发现通过在分散剂中将1重量％的碳纳米管均匀分散在聚（酰胺酸）中，可以将聚酰亚胺的全酰亚胺化温度从300℃降低至250℃。通过光学显微镜和扫描电子显微镜观察到碳纳米管的分布状态不同，证明了碳纳米管的更好分散大大提高了酰亚胺化的速度。而且，DSC结果表明，碳纳米管的分布更均匀，可以获得较低的聚酰胺酸分解温度，这加速了聚酰胺酸的环脱水过程。

著录项

  • 来源
    《Polymer Degradation and Stability》 |2010年第9期|p.1672-1678|共7页
  • 作者

    Qing-Yuan Tang; rnJie Chen; rnY.C. Chan; rnC.Y. Chung;

  • 作者单位

    Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong, China;

    rnDepartment of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong, China;

    rnDepartment of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong, China;

    rnDepartment of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong, China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    polyimide/carbon nanotube composite; curing; distribution; thermal imidization; fluorescence;

    机译：聚酰亚胺/碳纳米管复合材料;养护;分配;热酰亚胺化萤光;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号