Additional information obtained through Porosimetry and BET Sorptometry includes total pore volume, surface area, and chemisorption. The reactivity of powdered components is directly correlated to the total reactive surface in the material and the size and shape of the pores. This reactivity is directly tested by the BET Sorptometer and, to a lesser extent, the WESA and the Mercury Porosimeter. While the BET Sorptometer provides the most thorough surface area and porosity analysis, the WESA provides quick external surface area information for quality control purposes. PMI is very active in developing new techniques to more accurately and efficiently characterize surface area and porosity.
Additional research continues for an improved model for pore tortuosity and flow-based pore volume.
The following table summarizes products suitable for the Battery Separator Industry.