Mesoscale constitutive modeling of non-crystallizing filled elastomers

Harish, Ajay B.; Wriggers, Peter; Jungk, J.; Hojdis, Nils; Recker, C.

doi:10.1007/s00466-015-1251-1

Cited by 13 publications

(8 citation statements)

References 121 publications

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Section: Tensile Propertiesmentioning

confidence: 99%

“…But despite the numerous studies devoted to an understanding of the Mullins effect, there is still no general agreeement on the origin of this effect probably because it may arise from different phenomena depending on the characteristics of the polymer-filler system. The literature on the Mullins effect was reviewed by Clément et al [70], Diani et al [71] and more recently by Harish et al [72]. On the basis of experiments based on atomic force microscopy under strain, Clément et al [70] showed that the Mullins effect is much more important with silica particles that has not undergone any surface treatment, in other words in particles that give rise to strong interaction with the PDMS chains.…”

Section: Tensile Propertiesmentioning

confidence: 99%

“…Harish et al [72] have developed a heterogeneous (or multiphase) constitutive model by considering clustering and percolation behavior of filler particles. According to the authors, contrary to crystallizing unfilled elastomers for which crystallization leads to distinctive physical and chemical changes, in filled elastomers, filler breakage can be considered as one of the, if not primay, causes for Mullins softening.…”

Section: Tensile Propertiesmentioning

confidence: 99%

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Mechanical and Electrical Properties of Elastomer Nanocomposites Based on Different Carbon Nanomaterials

Bokobza¹

2017

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Carbon nanostructures including carbon black, carbon nanotubes, graphite or graphene have attracted a tremendous interest as fillers for elastomeric compounds. The preparation methods of nanocomposites that have a strong impact on the state of filler dispersion and thus on the properties of the resulting composites, are briefly described. At a same filler loading, considerable improvement in stiffness is imparted to the host polymeric matrix by the carbon nanomaterials with regard to that provided by the conventional carbon black particles. It is mainly attributed to the high aspect ratio of the nanostructures rather than to strong polymer-filler interactions. The orienting capability of the anisotropic fillers under strain as well the formation of a filler network, have to be taken into account to explain the high level of reinforcements. A comparison of the efficiency of the different carbon nanostructures is carried out through their mechanical and electrical properties but no clear picture can be obtained since the composite properties are strongly affected by the state of filler dispersion.

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Section: Tensile Propertiesmentioning

confidence: 99%

Section: Tensile Propertiesmentioning

confidence: 99%

Section: Tensile Propertiesmentioning

confidence: 99%

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Mechanical and Electrical Properties of Elastomer Nanocomposites Based on Different Carbon Nanomaterials

Bokobza¹

2017

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“…The dispersion state of CNTs into the NR/EPDM matrix is highly affected by mechanical interactions between the matrix and nanotubes. It seems that the CNTs could have some interactions with NR/EPDM matrix during the vulcanization process which leads to improvements of cure characteristics and mechanical behavior .…”

Section: Resultsmentioning

confidence: 99%

An experimental study of the effect of CNTs on the mechanical properties of CNTs/NR/EPDM nanocomposite

2017

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Carbon nanotube (CNT)/Natural rubber (NR)/ ethylene–propylene diene monomer (EPDM) nanocomposites were prepared via a traditional mixing method using a two‐roll mixer and cured by a conventional vulcanization system. The nanocomposites were characterized with respect to their curing characteristics and mechanical properties. The cure characteristic investigations showed that the introduction of CNTs into the rubber blend leads to a decrease in scorch and cure times. The minimum and maximum torque values of the cured nanocomposites rise with respect to CNTs loading. Tensile strength of NR/EPDM (75/25 wt/wt) blends containing 0.5 wt% of CNTs showed an increase compared to the NR/EPDM blends. The moduli of the nanocomposites at 100% and 300% elongations revealed that the CNTs can increase these parameters with no significant effect on the elongation at break. The stress–strain behavior of the nanocomposites was analyzed by some proper phenomenological hyperelastic models and the effect of CNTs loading on their material parameters was investigated. The introduction of CNTs into the NR/EPDM matrix leads to a significant change in material parameters of hyperelastic models. The results suggested that various CNTs loadings have a significant effect on the dispersion state of nanotubes and ultimate mechanical properties of CNT/NR/EPDM nanocomposites. POLYM. COMPOS., 39:4071–4079, 2018. © 2017 Society of Plastics Engineers

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“…[ 4 ] The mechanisms of both types of stress softening phenomena receive a sustained interest from the scientific community in the past decades. [ 5–7 ] While most research work centers on rubber nanocomposites, gum vulcanizates actually demonstrate Payne effect [ 8–20 ] and Mullins effect. [ 15,21–30 ]…”

Section: Introductionmentioning

confidence: 99%

Strain Softening of Bimodal Isoprene Rubber Vulcanizates

Hou

Xia

Song

et al. 2021

Macro Materials & Eng

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Isoprene rubber (IR) vulcanizates soften upon large‐amplitude oscillational shear and large‐strain cyclic tensile deformation. The mechanisms of these two strain softening behaviors remain unclarified and methods for reducing the accompanied mechanical dissipations are not well established. Herein IR/liquid isoprene rubber bimodal blends are cured into vulcanizates with similar cross‐linking densities. The results indicate that, in comparison with the pure IR network, the bimodal networks demonstrate lowered loss modulus and loss tangent at low strain amplitudes during oscillational shear and reduced loading−unloading dissipation energy at large strains during cyclic tensile deformation. The latter is ascribed to the weakened strain‐induced crystallization (SIC) as disclosed by in situ wide angle X‐ray diffraction. To the best of the current knowledge, the depression of SIC and thus dissipation energy in cyclic deformation is seldom reported for rubber materials. This work provides a new perspective for preparing rubber materials with balanced deformation resistance and mechanical hysteresis.

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Mesoscale constitutive modeling of non-crystallizing filled elastomers

Cited by 13 publications

References 121 publications

Mechanical and Electrical Properties of Elastomer Nanocomposites Based on Different Carbon Nanomaterials

Mechanical and Electrical Properties of Elastomer Nanocomposites Based on Different Carbon Nanomaterials

An experimental study of the effect of CNTs on the mechanical properties of CNTs/NR/EPDM nanocomposite

Strain Softening of Bimodal Isoprene Rubber Vulcanizates

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