Deformation behavior of crosslinked polyurea elastomers obtained via sol-gel chemistry: experimental determination and constitutive modelling

NAHUEL RULL; FRONTINI, P.M.

EXPRESS POLYMER LETTERS

BUDAPEST UNIV TECHNOL & ECON

Año: 2019

1788-618X

For any reference to your paper, you can use the DOI number(10.3144/expresspolymlett.2020.54) and the proof. The DOI number isvalid but it will be inactive until the day of publishing the paper.The mechanical behavior of three crosslinked polyurea (PU) elastomers obtained by sol-gel chemistry under uniaxialmonotonic and cyclic tests has been assessed. These elastic networks are composed of hard and soft domains, wherethe segmental molecular weight between crosslinking points differs among the samples and allow studying the effect of thisparameter on the mechanical properties. In this paper, uniaxial tension tests were performed in order to capture the maincharacteristics of the stress-strain behavior of these PU elastomers, e.g., non-linear hyperelastic behavior, hysteresis, andsoftening. In addition, a constitutive model that properly represents their behavior was proposed showing that the non-linearstress-strain behavior at large strain values exhibits strong hysteresis and softening.