Sintering kinetics for polymer particles

聚合物颗粒的烧结动力学

• 批准号: 169802161
• 负责人: Dr. Michael Kappl
• 金额: --
• 依托单位: Max-Planck-Institut für Polymerforschung
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/169802161?language=en
• 关键词: Sintering; kinetics; polymer; particles

The aim of this work is to gain a fundamental understanding of the early stage of sintering of polymer particles. Specifically, the following question shall be addressed:1) How do contact forces increase during the early stage of sintering?2) What is the kinetics of sintering neck formation for micrometer-sized particles3) How does the mechanical strength of the sintered material increase with time?For particles with diameters of a few micrometers or less, the classical sintering models, e.g. the Frenkel model underestimate sintering rates. This is due to surface forces that provide an additional driving force which becomes significant for small particles.

这项工作的目的是获得对聚合物颗粒烧结早期阶段的基本了解。具体来说，需要解决以下问题：1）在烧结初期，接触力如何增加？2）微米尺寸颗粒的烧结颈形成动力学是什么？3）烧结材料的机械强度如何随时间增加？对于直径为几微米或更小的颗粒，经典的烧结模型，例如Frenkel 模型低估了烧结速率。这是由于表面力提供了额外的驱动力，这对于小颗粒来说变得很重要。