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- Measuring in-situ X-ray scattering of natural rubber biaxial deformation: A new equipment for polymer studiesPublication . Silva, Daniel P. da; Lamolinara, Barbara; Costa, André; Gameiro, Fábio; Pascoal-Faria, Paula; Mateus, Artur; Martinez, Juan Carlos; Phinyocheep, Pranee; Amornsakchai, Taweechai; Mitchell, Geoffrey R.Understanding biaxial deformation is essential for a more realistic evaluation of rubber elasticity compared to the more usual uniaxial deformation. To study crystallisation occurring during biaxial deformation of natural rubber films, a new simple equipment has been designed and assembled. The equipment, mounted in the beamline of ALBA synchrotron light source facility, allowed the in-situ measurement of X-ray scattering of natural rubber during biaxial deformation. This work provides, for the first time, quantitative information on crystallisation during biaxial extension.