Large strain/time dependent mechanical behaviour of PMMAs of different chain architectures. Application of time-temperature superposition principle

Federico, Carlos Eloy; Bouvard, Jean-Luc; Combeaud, Christelle; Billon, Noëlle

doi:10.1016/j.polymer.2018.02.021

Cited by 41 publications

(43 citation statements)

References 27 publications

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“…Rubbery-like behaviour can be expected for equivalent frequency ranging from 0.1 to 0.001 [33][34][35]. The crosshead motion during tensile tests was controlled with an exponential velocity (Equation (1)) which ensures a quasi-constant strain rate during the test in case of uniform deformation along the sample.…”

Section: Uniaxial Stretching Protocolmentioning

confidence: 99%

See 1 more Smart Citation

Strain-induced crystallization of poly(ethylene 2,5-furandicarboxylate). Mechanical and crystallographic analysis

Forestier

Combeaud

Guigo

et al. 2020

Polymer

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Section: Uniaxial Stretching Protocolmentioning

confidence: 99%

“…It was then demonstrated that a range for draw ability of PEF could be defined in terms of equivalent strain rate at a reference temperature deduced from linear visco-elastic analysis, as for PET and other materials (for more information see Refs. [33][34][35]).…”

Section: Introductionmentioning

confidence: 99%

Strain-induced crystallization of poly(ethylene 2,5-furandicarboxylate). Mechanical and crystallographic analysis

Forestier

Combeaud

Guigo

et al. 2020

Polymer

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“…Numerous experimental studies have been conducted in the literature to substantially understand the leading failure mechanisms common in SCPs (Benaarbia et al, 2015;Federico et al, 2018). Through examination of past research, strong interaction between time-dependent (viscous effects), time-independent (plasticity effects), and temperature-activated (thermoelasticity, entropic elasticity, etc.)…”

Section: Introductionmentioning

confidence: 99%

A fully coupled thermo-viscoelastic-viscoplastic-damage framework to study the cyclic variability of the Taylor-Quinney coefficient for semi-crystalline polymers

Benaarbia¹,

Chatzigeorgiou²,

Kiefer

et al. 2019

International Journal of Mechanical Sciences

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“…They showed that the recovery of the polymer reduces the filling efficiency during the unloading step of the process, but this occurs only when the strain energy is high enough to break the interfacial bonding between the die cavity and the polymer substrate. The time-temperature superposition principle was applied to study the large-deformation mechanical behaviour of poly (methyl methacrylate) (PMMA) by Federico et al [10]. A so-called equivalent strain rate, which describes the relationship between the strain rate and the temperature, was considered as a unique parameter to characterise the polymer complex properties above the T g .…”

Section: Introductionmentioning

confidence: 99%

Effect of viscoplasticity on microfluidic cavity filling efficiency of a thermoplastic polymer in hot-embossing process

Cheng

Barrière

2019

Int J Adv Manuf Technol

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The micro hot-embossing process is an efficient and low-cost manufacturing process that can produce components with complex geometries in a wide variety of materials. The physical behaviour of the material needs to be investigated to achieve optimisation of the process. Many experimental results have been presented in the literature; however, modelling of the material properties and simulations of the process to improve the microreplication quality are still lacking. The principal scientific challenge in the numerical simulation is to provide an efficient material behaviour law to describe the deformation of the material during the process. The physical constitutive behaviour law of polymer plates in the hot-embossing process can be treated as viscoelastic or viscoplastic, depending on the various process boundary conditions. This study mainly concerns the identification of a physical constitutive behaviour law for an amorphous polymer poly (methyl methacrylate) (PMMA), which is used in hot-embossing processes at the microscale. Uniaxial compression tests were carried out under various temperature conditions slightly above the glass transition temperature (T g ) of the polymer, and the viscoplastic behaviour of the polymer was characterised. In the present study, the fabrication of a complex microfluidic device is treated as a case study, focusing on the filling stage of the process. Modelling in numerical software using the implemented polymer behaviour model was realised, and the influence of different processing and material parameters on the filling efficiency was investigated at the microscale in two different zones (channel and reservoir). Specific related microreplications in the processing temperature range from T g + 20°C to T g + 40°C with different material parameters were also studied and compared. The results of the simulation were in good agreement with the experimental results in terms of replication for the PMMA amorphous thermoplastic polymer compared at different microscales and in different zones, confirming the efficiency of the proposed approach with different comparisons in 2D and 3D cases. Moreover, the models can be used when similar behaviours are observed in amorphous thermoplastics and extended to other micro hot-embossing components.

show abstract

Large strain/time dependent mechanical behaviour of PMMAs of different chain architectures. Application of time-temperature superposition principle

Cited by 41 publications

References 27 publications

Strain-induced crystallization of poly(ethylene 2,5-furandicarboxylate). Mechanical and crystallographic analysis

Strain-induced crystallization of poly(ethylene 2,5-furandicarboxylate). Mechanical and crystallographic analysis

A fully coupled thermo-viscoelastic-viscoplastic-damage framework to study the cyclic variability of the Taylor-Quinney coefficient for semi-crystalline polymers

Effect of viscoplasticity on microfluidic cavity filling efficiency of a thermoplastic polymer in hot-embossing process

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