ABSTRACT
The strain state of the rubbery fraction in an elastomer can be affected by the addition of a rigid filler or by the so-called strain-induce crystallization that may take place above some critical draw ratio. A quantification of this effect is necessary to fully understand how the mechanical properties of the material are impacted. A simple procedure based on X-ray diffraction is presented here and illustrated by few examples. A main advantage of this technique is that it allows continuous measurements at various temperatures without requiring any constraining environment.
