Experimental investigation of the nonlinear quasi-static and dynamic mechanical behaviour of novel PA6/XHNBR thermoplastic vulcanizates: Linking mechanical nonlinearities to microstructural features

Burgoa, Aizeti; Arriaga, Aitor; Zulueta, Kepa; Acuña, Eva Maria; Laza, José Manuel; Hernandez, Ricardo Martinez; Vilas, José Luis

doi:10.1016/j.mtcomm.2020.101395

Cited by 3 publications

(5 citation statements)

References 67 publications

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“…Original and recycled TPV compounds present similar permanent deformation as long as we stay in the elastic region. PP phase crystallinity degree and crystalline lamellae thickness are important for elastic recovery [39]. As found out by DSC analysis, crystallinity is not affected by recycling and so the elastic recovery at small strains more or less stays the same, independently of recycling steps.…”

Section: Cyclic Stress-strain Behaviormentioning

confidence: 80%

Effect of multiple recycling on thermo-mechanical and rheological behaviour of PP/EPDM thermoplastic vulcanizates

Burgoa¹,

Arriaga²,

Schreier-Alt

2023

Preprint

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Driven by the need to design sustainable polymeric materials that remain superior mechanical properties after recycling, this work is centred on the effect of multiple recycling of thermoplastic vulcanizates (TPVs). Among thermoplastic elastomers, TPVs combine several favourable characteristics such as damping, light weight, ease of processing by means of injection moulding, design flexibility and recyclability. Multiple processing of a commercially available PP/EPDM TPV by shredding and injection moulding was followed by analytical investigations on rheological and thermo-mechanical properties using melt rheological measurements, dynamic mechanical analysis, differential scanning calorimetry analysis and mechanical tests. The results show that key performance parameters of the TPV such as Young’s modulus, stress at 100% strain as well as stress and strain at break only change slightly. Stress at 100% strain can be used as a quality indicator as it decreases linearly with every recycling step. This study opens new opportunities to increase the content of recycled PP/EPDM TPV and even manufacture technical components with 100% recycled material.

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Section: Cyclic Stress-strain Behaviormentioning

confidence: 80%

Effect of multiple recycling on thermo-mechanical and rheological behaviour of PP/EPDM thermoplastic vulcanizates

Burgoa¹,

Arriaga²,

Schreier-Alt

2023

Preprint

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“…The thermoplastic phase is hard at room temperature but becomes fluid at high temperatures, while the dispersed rubber particles are soft and elastic at room temperature, yielding a unique combination of elastic properties and melt (re)processability 9,10 . TPVs represent an interesting material choice for anti‐vibration products due to their inherent light weight, recyclability, ease of processing by means of injection molding and design flexibility 11 …”

Section: Introductionmentioning

confidence: 99%

“…9,10 TPVs represent an interesting material choice for anti-vibration products due to their inherent light weight, recyclability, ease of processing by means of injection molding and design flexibility. 11 Commercial TPVs are usually based on blends of polypropylene (PP) and ethylene-propylene-diene (EPDM) rubber. The most important properties of TPVs including static and dynamic mechanical properties are controlled by their morphology.…”

Section: Introductionmentioning

confidence: 99%

On the injection molding of thick‐walled thermoplastic vulcanizates: linking static and dynamic mechanical properties with morphology

Burgoa

Arriaga

Badiola

et al. 2023

Polymer International

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Elastomers are widely used in the automotive industry in anti‐vibration components. Commonly, elastomeric anti‐vibration components are made of thermoset rubbers. However, new drivers related to the requirements of the new sustainable mobility industry are pushing towards the substitution of thermoset rubbers by thermoplastic elastomers. Among thermoplastic elastomers, thermoplastic vulcanizates (TPVs) represent an interesting material choice for anti‐vibration products due to their light weight, recyclability, ease of processing by means of injection molding and design flexibility. In this work, the correlation between static and dynamic mechanical properties and the morphology of injection molded thick‐walled TPVs is investigated. Interestingly, when comparing TPVs of different hardnesses, the softest TPV demonstrated an improvement in elastic ability to recover of up to 50% in transverse to flow direction as well as a highly anisotropic viscoelastic behavior. These phenomena are interpreted in terms of the orientation of ethylene‐propylene‐diene particles together with polypropylene crystals and chain alignment observed in microstructural characterization tests. This study opens new opportunities to develop TPV‐based anti‐vibration components with superior elasticity and customizable static and dynamic mechanical properties by considering the anisotropic character of soft TPV materials in product design and development strategies. © 2022 Society of Industrial Chemistry.

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“…Therefore, to obtain a component that meets both requirements, that is, high stiffness while exhibiting enhanced vibration damping performance, the thickness of the damping layer needs to be optimized for a given hard/soft hybrid structure. Among soft materials, thermoplastic elastomers (TPEs) are a special type of viscoelastic materials that combine the performance properties of elastomers with the easy processing of thermoplastics 23,24 …”

Section: Introductionmentioning

confidence: 99%

“…Among soft materials, thermoplastic elastomers (TPEs) are a special type of viscoelastic materials that combine the performance properties of elastomers with the easy processing of thermoplastics. 23,24 Due to the identified potential benefits of these bimaterial structures, the development of hybrid structures based on SMC and TPE materials having high stiffness and wide vibration damping properties is studied in the present work. Thickness of the SMC layer was maintained constant and two different thicknesses of TPE layer have been studied, so as to evaluate the effect of the TPE addition on the strength and stiffness as well as the damping properties of the bi-layer structures.…”

Section: Introductionmentioning

confidence: 99%

SMC/TPE bi‐layer configurations for structural vibration damping applications

Burgoa

Lekube

Zulueta

2021

J of Applied Polymer Sci

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Sheet molding compounds (SMCs) have considerable potential as lightweight alternative to traditional materials used in automotive components. However, despite their outstanding mechanical properties, their vibration damping characteristics are often relatively poor for several applications. Therefore, enhancing the vibration damping capability of SMCs represents a field with increasing interest. Application of viscoelastic layers to high stiffness materials, such as SMCs, represents an effective approach to add vibration damping functionalities to lightweight structural components. In this work, the incorporation of thermoplastic elastomers (TPEs) is studied as a novel strategy to enhance the structural vibration damping capability of SMCs. Several types of SMC and TPEs have been considered and the effect of TPE‐SMC thickness ratio on the damping and stiffness properties is investigated. The viscoelastic properties and vibration damping performance were evaluated by dynamic mechanical analysis. The effect of TPE addition on stiffness was studied by three‐point bending. Results reveal the potential of the incorporation of thin TPE layers as cost‐effective strategy to enlarge the vibration damping efficiency of SMCs while maintaining their overall high stiffness. It is expected that the bi‐material configurations presented in the current study will contribute to advance the development of new lightweight multi‐functional solutions for modern transport applications.

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Experimental investigation of the nonlinear quasi-static and dynamic mechanical behaviour of novel PA6/XHNBR thermoplastic vulcanizates: Linking mechanical nonlinearities to microstructural features

Cited by 3 publications

References 67 publications

Effect of multiple recycling on thermo-mechanical and rheological behaviour of PP/EPDM thermoplastic vulcanizates

Effect of multiple recycling on thermo-mechanical and rheological behaviour of PP/EPDM thermoplastic vulcanizates

On the injection molding of thick‐walled thermoplastic vulcanizates: linking static and dynamic mechanical properties with morphology

SMC/TPE bi‐layer configurations for structural vibration damping applications

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