Charakterisierung der temperaturabhängigen Eigenschaften von partikelgefüllten Polymeren

颗粒填充聚合物的温度依赖性特性表征

• 批准号: 86197527
• 负责人: Professor Dr.-Ing. Bernd Weidenfeller
• 金额: --
• 依托单位: Institut für Mechanische Verfahrenstechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/86197527?language=en
• 关键词: Charakterisierung; der; temperaturabh; ngigen; Eigenschaften

Especially in micro electronics, evoked by a rising performance of active elements, heat transfer gets more and more important. One goal is to enhance the thermal conductivity of materials in electronic components or around by developing polymer based matrix materials with functional fillers. Additionally the change of thermal properties of materials also changes process parameters in during production. For example: a higher thermal conductivity evokes a shortening of the injection molding cycles in production process of polymers. In spite of the importance of these parameters, nearly no values can be found in literature and can not be calculated. Thus, parameters are obtained by trial and error. Unfortunately until today there are no theoretical models which can be used to calculate thermal conductivity of composites. Only with an empirical model by Agari and Uno measurement values can be calculated reproducibly. Nevertheless, the physical meaning of 2 constants used by the model is not known sufficiently known to ensure a theoretical calculation of thermal diffusivity. Results of thermal diffusivity will be compared with measured cooling curves of the injection molding process, whereas a model based description of the cooling behavior of the composites will be developed. Goal of the proposal is to give a contribution for model based descriptions of the thermal diffusivity of composites as well as the influence of thermal diffusivity on the cooling behavior during injection molding.

特别是在微电子领域，由于有源元件性能的不断提高，热传递变得越来越重要。其中一个目标是通过开发具有功能填充物的聚合物基基材料来提高电子元件或周围材料的导热系数。此外，材料热物性的变化也会改变生产过程中的工艺参数。例如：较高的导热系数可缩短聚合物生产过程中的注塑周期。尽管这些参数很重要，但在文献中几乎找不到任何值，也无法计算。因此，参数是通过试错法获得的。遗憾的是，到目前为止，还没有可以用来计算复合材料导热系数的理论模型。只有用Agari和Uno的经验模型才能计算出重复性的测量值。然而，该模型所使用的2个常量的物理意义尚不清楚，无法确保热扩散率的理论计算。热扩散率的结果将与注塑成型过程的测量冷却曲线进行比较，而基于模型的复合材料冷却行为的描述将被开发出来。该建议的目的是为基于模型的描述复合材料的热扩散率以及热扩散率对注射成型过程中冷却行为的影响做出贡献。