Rate dependent finite deformation stress–strain behavior of an ethylene methacrylic acid copolymer and an ethylene methacrylic acid butyl acrylate copolymer

Mechanical properties of nanosilica/polypropylene composites under dynamic compression loading

“…For example, at a fixed strain of 0.05, the difference of flow stress values between the strain rate of 0.01 s −1 and 1011 s −1 for PP‐3 SiO 2 , was 136.06 MPa. Even though there is only a limited amount of literature that addresses the effect of strain rate on the stress–strain behaviors of particulate filled polymer matrix composites (PMCs), these results were similar to those reported for several polymers [28–30]. The authors believe that this behavior is attributed to the difference of the molecular relaxation (shifting of glass transition) in the viscoelastic materials, under different loading conditions and temperatures [29].…”

Static and dynamic compressive properties of mica/polypropylene composites

“…The effect of particle weight contents towards compressive strength of pure polypropylene and its composites. [39][40][41]. In this case, the enhancement of the compressive strength, under dynamic loading compared to static loading, is directly related to the shifting of the glass transition for viscoelastic material during the impact test, as previously reported by [39].…”

“…[39][40][41]. In this case, the enhancement of the compressive strength, under dynamic loading compared to static loading, is directly related to the shifting of the glass transition for viscoelastic material during the impact test, as previously reported by [39]. These authors report, that at low strain rates (static), the polymeric material is near the rubbery-like regime, whereas at high rates, it has fully entered the leathery regime, where intermolecular interactions in the amorphous domains begin to pose a significant resistance to deformation [39].…”

Particle size – Dependent on the static and dynamic compression properties of polypropylene/silica composites

“…Obviously, all of the PP/SiO 2 specimens tested showed a positive increment in yield strength, with an increasing loading rate. This phenomenon was directly attributed to the viscoelastic properties [11,28] of the polypropylene and the mobility of the polymer chains during loading [29]. Guo and Li [21] reported that increasing loading rate will gradually decrease the mobility of the polymer chains, and therefore, higher stress is required to generate a certain deformation (i.e., strain).…”