What is the Poissons ratio of our materials?
A. Poisson’s ratio is the ratio of transverse contraction strain to longitudinal extension strain in the direction of stretching force. Tensile deformation is considered positive and compressive deformation is considered negative. The definition of Poisson’s ratio contains a minus sign so that normal materials have a positive ratio. Since this physical property is not commonly requested in the thermoset plastics industry, we do not publish it. We also do not have the capability to measure this ratio. The value is estimated at .3.
