• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Thin copper conductivity foil heater for measuring the thermal of polymers
【24h】

Thin copper conductivity foil heater for measuring the thermal of polymers

机译：薄铜导电箔加热器，用于测量聚合物的热

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

A new and rather simple apparatus is described for measuring the thermal conductivity of insulating materials. The technique employs a double-sided, copper-coated plastic sheet, known as a printed circuit board, to generate a nearly uniform wall heat flux. Heating is achieved by passing an electrical current through the copper coating. Identical sample slabs are placed against opposite sides of the heater, and the combination is placed in a bath having constant and uniform temperature. When thermal equilibrium is reached, the temperature drops across the central portions of the sample slabs are measured with thermocouples. The one-dimensional form of Fourier heat transfer equation is used to compute thermal conductivity from the observed quantities. In preliminary tests with polymer materials, equilibrium is reached within half an hour. It is estimated that the apparatus is capable of giving measurements accurate to within 5%, and experimental results are consistent with this estimate. Thermal conductivity values are reported for pure polyethylene (PE) and PE mixed with aluminum powder and carbon black. Also reported is the thermal conductivity of pure polycarbonate (PC) and PC mixed with carbon black. The results obtained with the present apparatus are consistent with previous findings. The characteristics of the apparatus make it especially suitable for academic laboratory instruction and for low temperature thermal conductivity measurements. (C) 2003 Wiley Periodicals, Inc. [References: 6]
机译：描述了一种用于测量绝缘材料的热导率的新颖且相当简单的设备。该技术采用了双面铜涂层塑料板（称为印刷电路板）来产生几乎均匀的壁热通量。通过使电流流过铜涂层来实现加热。将相同的样品板放在加热器的相对两侧，并将组合放置在温度恒定且均匀的浴中。当达到热平衡时，用热电偶测量样品板中心部分的温度降。傅立叶传热方程的一维形式用于根据观测到的量计算热导率。在使用聚合物材料进行的初步测试中，半小时内达到了平衡。估计该设备能够提供精确到5％的测量值，并且实验结果与此估计值一致。报告了纯聚乙烯（PE）以及与铝粉和炭黑混合的PE的热导率值。还报道了纯聚碳酸酯（PC）和PC与炭黑混合的热导率。用本装置获得的结果与以前的发现是一致的。该设备的特性使其特别适合于学术实验室指导和低温热导率测量。 （C）2003 Wiley Periodicals，Inc. [参考：6]

著录项

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