The role of water content for the emeraldine base structure

A series of the polyaniline samples in the emeraldine base form was synthesised in various conditions, and was then subjected to the experimental X-ray diffraction measurements and a computer modelling study. Additionally, the elemental analysis technique was also used. Reasonable models of the crystalline structure of various types of the polymer systems (known as EB-1 and EB-2) are proposed. The presence of water molecules in the crystalline regions of polyaniline is discussed, and the significant role of these molecules for the structural properties of emeraldine base samples is explained.