Sintering kinetics for polymer particles

这项工作的目的是获得一个基本的理解的早期阶段的烧结聚合物颗粒。具体而言，应解决以下问题：1）在烧结的早期阶段，接触力如何增加？2)什么是微米级颗粒烧结颈形成的动力学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一个额外的驱动力，这对小颗粒来说变得很重要。

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.