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

Burgoa, Aizeti; Arriaga, Aitor; Badiola, Jon Haitz; Ibarretxe, Julen; Iturrondobeitia, Maider; Martinez‐Amesti, Ana; Vilas, José Luis

doi:10.1002/pi.6497

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…Nevertheless, processing parameters influence the particles' distortion state, as shown in Reference 3. In a recent publication by Burgoa et al, 12 the anisotropic nature of injection molded TPV has been confirmed.…”

Section: Introductionmentioning

confidence: 88%

Effects of the injection molding processing settings on the phase morphology and mechanical anisotropy of thermoplastic vulcanizates

Mentges,

Çelik,

Dahlmann

et al. 2023

Polymer Engineering & Sci

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Thermoplastic vulcanizates show significant anisotropic mechanical properties when processed to components via injection molding. This effect is related to a process‐dependent distortion of the incorporated elastomer particles in high‐shear regions during the injection phase. In a plate geometry, the elastomer particles in the shear regions are oriented and deformed in the flow direction. However, the ongoing distortion processes and the influencing factors of the process parameters on the resulting phase morphology and mechanical response are not entirely understood. Therefore, in this study, the effect of the injection molding machine settings for the production of a plate component on the local phase morphology and mechanical anisotropy is investigated. The investigations are conducted on two commercial material grades with different Shore‐A hardness 30 and 90. A significant inverse effect of the injection volume flow rate on the particle distortion and anisotropy is found. Increasing the volume flow rate results in a reduction of the anisotropy. This is counterintuitive from the experience of other materials with process‐dependent anisotropy. Also, a significant influence of the process on the overall stiffness of the compounds is observed.Highlights Sturcture–property relation for phase morphology in thermoplastic vulcanizates Quantitative microstructure analysis in injection molded plates Macroscopic analysis of anisotropic mechanical response under uniaxial loading Effect analysis of injection molding parameters on the mechanical anisotropy Additional effects of process settings on overall stiffness of the material

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Section: Introductionmentioning

confidence: 88%

Effects of the injection molding processing settings on the phase morphology and mechanical anisotropy of thermoplastic vulcanizates

Mentges,

Çelik,

Dahlmann

et al. 2023

Polymer Engineering & Sci

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Effect of Multiple Recycling on Thermo-mechanical and Rheological Behaviour of PP/EPDM Thermoplastic Vulcanizates

Burgoa,

Arrillaga,

Schreier-Alt

2023

J Polym Environ

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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 exibility 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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Multidisciplinary design of door inner belt weatherstrip for simultaneous reduction of wind noise and squeaking in electric vehicles

Lee,

Yoon,

Cho

et al. 2023

Materials Today Communications

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

Cited by 3 publications

References 35 publications

Effects of the injection molding processing settings on the phase morphology and mechanical anisotropy of thermoplastic vulcanizates

Effects of the injection molding processing settings on the phase morphology and mechanical anisotropy of thermoplastic vulcanizates

Effect of Multiple Recycling on Thermo-mechanical and Rheological Behaviour of PP/EPDM Thermoplastic Vulcanizates

Multidisciplinary design of door inner belt weatherstrip for simultaneous reduction of wind noise and squeaking in electric vehicles

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