Nanomechanical Characterization of Single Micron-Sized Polymer Particles

作者：He J Y; Zhang Z L^*; Kristiansen H

来源：Journal of Applied Polymer Science, 2009, 113(3): 1398-1405.

DOI：10.1002/app.29913

• amorphous
• crosslinking
• mechanical properties
• stress
• strain

The mechanical characterization of single micron-sized polymer particles is very important for understanding the anisotropic conductive adhesives interconnection. In this article, a nanoindentation-based flat punch method was employed to investigate the mechanical properties of single polymer particles. A diamond flat tip, instead of a commonly used sharp tip for indentation, was specially designed to deform single polymer particles. The maximum applied load is 10 mN and the linear loading/unloading rate is 2 mN/s. Two types of amorphous polymer particles were examined. The polymer particles display significantly different stress-strain behaviors. The material responses at different strain levels were analyzed and compared. A particle size effect, the smaller the diameter, the harder the particle, on the compression stress-strain behavior, was observed.

• 出版日期2009-8-5