A comparison between X-ray diffraction and quantitative calorimetry to evaluate the strain-induced crystallinity in natural rubber

Jean-Benoit Le Cam (1) , P.-A. Albouy (2) , Sylvain Charles (1)

1 IPR - Institut de Physique de Rennes
2 LPS - Laboratoire de Physique des Solides

The crystallinity of stretched crystallizable rubbers is classically evaluated using X-ray diffraction (XRD). Recently, a measurement technique based on quantitative surface calorimetry from infrared thermography (IRT) has been proposed in Le Cam (2018), but results obtained were not compared with XRD measurements. In the present paper, the two measurement techniques are used for evaluating of the strain-induced crystallinity of the same unfilled natural rubber. This study provides the first comparison between the two techniques. Results obtained highlight a very satisfactory agreement between the two measurements, which validates a new and simple way for evaluating the strain-induced crystallinity from temperature measurements.

Keywords: Calorimeters; Calorimetry; Constitutive models; Crystallinity; Temperature measurement; X ray diffraction; Measurement techniques; Strain induced; XRD measurements; Rubber

Domains: Physics [physics]

Jean-Benoit Le Cam, P.-A. Albouy, Sylvain Charles. A comparison between X-ray diffraction and quantitative calorimetry to evaluate the strain-induced crystallinity in natural rubber. 11th European Conference on Constitutive Models for Rubber, 2019, Jun 2019, Nantes, France. pp.58-62, ⟨10.1201/9780429324710-11⟩. ⟨hal-02499974⟩