---
_id: '59135'
abstract:
- lang: eng
  text: Compounding is an important step in processing base polymers and is used to
    incorporate various additives into a polymer. For this purpose, different screw
    elements are used for dispersive and distributive mixing on a co-rotating twin-screw
    extruder. Optimising the screw configuration requires precise knowledge of the
    screw elements’ mixing properties, which have not been thoroughly investigated.
    This study analyses the mixing behaviour of individual screw elements regarding
    dispersive and distributive mixing using 3D CFD flow simulations with subsequent
    particle tracking. For distributive mixing, the particle distribution behind the
    screw elements in the XY plane is analysed and the mixing index MQ, which relates
    the standard deviation and the mean value of the triangular areas between the
    particles, is calculated. For dispersive mixing, the maximum shear stress on the
    particle path and the integral of the shear stress over the residence time of
    each individual particle are determined. The results show that screw element geometry
    and rotation speed have a significant influence on dispersive and distributive
    mixing. In addition, better dispersive mixing is achievable with highly viscous
    materials. These findings enable the optimisation of the mixing zone of a co-rotating
    twin-screw extruder for the efficient mixing of mineral fillers.
author:
- first_name: Jan Philipp
  full_name: Oldemeier, Jan Philipp
  id: '56781'
  last_name: Oldemeier
- first_name: Volker
  full_name: Schöppner, Volker
  id: '20530'
  last_name: Schöppner
citation:
  ama: Oldemeier JP, Schöppner V. Analysis of the Dispersive and Distributive Mixing
    Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder with Particle
    Tracking. <i>Polymers</i>. 2024;16(21). doi:<a href="https://doi.org/10.3390/polym16212952">10.3390/polym16212952</a>
  apa: Oldemeier, J. P., &#38; Schöppner, V. (2024). Analysis of the Dispersive and
    Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder
    with Particle Tracking. <i>Polymers</i>, <i>16</i>(21). <a href="https://doi.org/10.3390/polym16212952">https://doi.org/10.3390/polym16212952</a>
  bibtex: '@article{Oldemeier_Schöppner_2024, title={Analysis of the Dispersive and
    Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder
    with Particle Tracking}, volume={16}, DOI={<a href="https://doi.org/10.3390/polym16212952">10.3390/polym16212952</a>},
    number={21}, journal={Polymers}, author={Oldemeier, Jan Philipp and Schöppner,
    Volker}, year={2024} }'
  chicago: Oldemeier, Jan Philipp, and Volker Schöppner. “Analysis of the Dispersive
    and Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw
    Extruder with Particle Tracking.” <i>Polymers</i> 16, no. 21 (2024). <a href="https://doi.org/10.3390/polym16212952">https://doi.org/10.3390/polym16212952</a>.
  ieee: 'J. P. Oldemeier and V. Schöppner, “Analysis of the Dispersive and Distributive
    Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder with Particle
    Tracking,” <i>Polymers</i>, vol. 16, no. 21, 2024, doi: <a href="https://doi.org/10.3390/polym16212952">10.3390/polym16212952</a>.'
  mla: Oldemeier, Jan Philipp, and Volker Schöppner. “Analysis of the Dispersive and
    Distributive Mixing Effect of Screw Elements on the Co-Rotating Twin-Screw Extruder
    with Particle Tracking.” <i>Polymers</i>, vol. 16, no. 21, 2024, doi:<a href="https://doi.org/10.3390/polym16212952">10.3390/polym16212952</a>.
  short: J.P. Oldemeier, V. Schöppner, Polymers 16 (2024).
date_created: 2025-03-25T10:19:50Z
date_updated: 2025-03-27T12:56:35Z
department:
- _id: '9'
- _id: '321'
- _id: '367'
doi: 10.3390/polym16212952
intvolume: '        16'
issue: '21'
keyword:
- Compoundieren
- disperses Mischen
- distributives Mischen
- Schneckenelemente
language:
- iso: eng
publication: Polymers
quality_controlled: '1'
status: public
title: Analysis of the Dispersive and Distributive Mixing Effect of Screw Elements
  on the Co-Rotating Twin-Screw Extruder with Particle Tracking
type: journal_article
user_id: '59363'
volume: 16
year: '2024'
...
---
_id: '52833'
author:
- first_name: Volker
  full_name: Schöppner, Volker
  id: '20530'
  last_name: Schöppner
- first_name: Laura
  full_name: Austermeier, Laura
  id: '45326'
  last_name: Austermeier
- first_name: Florian
  full_name: Brüning, Florian
  id: '72920'
  last_name: Brüning
- first_name: Jan Philipp
  full_name: Oldemeier, Jan Philipp
  id: '56781'
  last_name: Oldemeier
- first_name: O.
  full_name: Brandt, O.
  last_name: Brandt
citation:
  ama: Schöppner V, Austermeier L, Brüning F, Oldemeier JP, Brandt O. Recycling-Ansatz
    für mehrkomponentige Kunststoffprodukte durch thermische Verbundtrennung. <i>EXTRUSION</i>.
    2023;(8/2023):56-59.
  apa: Schöppner, V., Austermeier, L., Brüning, F., Oldemeier, J. P., &#38; Brandt,
    O. (2023). Recycling-Ansatz für mehrkomponentige Kunststoffprodukte durch thermische
    Verbundtrennung. <i>EXTRUSION</i>, <i>8/2023</i>, 56–59.
  bibtex: '@article{Schöppner_Austermeier_Brüning_Oldemeier_Brandt_2023, title={Recycling-Ansatz
    für mehrkomponentige Kunststoffprodukte durch thermische Verbundtrennung}, number={8/2023},
    journal={EXTRUSION}, author={Schöppner, Volker and Austermeier, Laura and Brüning,
    Florian and Oldemeier, Jan Philipp and Brandt, O.}, year={2023}, pages={56–59}
    }'
  chicago: 'Schöppner, Volker, Laura Austermeier, Florian Brüning, Jan Philipp Oldemeier,
    and O. Brandt. “Recycling-Ansatz für mehrkomponentige Kunststoffprodukte durch
    thermische Verbundtrennung.” <i>EXTRUSION</i>, no. 8/2023 (2023): 56–59.'
  ieee: V. Schöppner, L. Austermeier, F. Brüning, J. P. Oldemeier, and O. Brandt,
    “Recycling-Ansatz für mehrkomponentige Kunststoffprodukte durch thermische Verbundtrennung,”
    <i>EXTRUSION</i>, no. 8/2023, pp. 56–59, 2023.
  mla: Schöppner, Volker, et al. “Recycling-Ansatz für mehrkomponentige Kunststoffprodukte
    durch thermische Verbundtrennung.” <i>EXTRUSION</i>, no. 8/2023, 2023, pp. 56–59.
  short: V. Schöppner, L. Austermeier, F. Brüning, J.P. Oldemeier, O. Brandt, EXTRUSION
    (2023) 56–59.
date_created: 2024-03-25T10:42:24Z
date_updated: 2024-03-25T10:53:46Z
department:
- _id: '9'
- _id: '367'
- _id: '321'
issue: 8/2023
language:
- iso: ger
page: 56-59
publication: EXTRUSION
publication_identifier:
  issn:
  - 2190-4774
status: public
title: Recycling-Ansatz für mehrkomponentige Kunststoffprodukte durch thermische Verbundtrennung
type: journal_article
user_id: '44116'
year: '2023'
...
---
_id: '34733'
abstract:
- lang: eng
  text: <jats:p>Due to their valuable properties (low weight, and good thermal and
    mechanical properties), glass fiber reinforced thermoplastics are becoming increasingly
    important. Fiber-reinforced thermoplastics are mainly manufactured by injection
    molding and extrusion, whereby the extrusion compounding process is primarily
    used to produce fiber-filled granulates. Reproducible production of high-quality
    components requires a granulate in which the fiber length is even and high. However,
    the extrusion process leads to the fact that fiber breakages can occur during
    processing. To enable a significant quality enhancement, experimentally validated
    modeling is required. In this study, short glass fiber reinforced thermoplastics
    (polypropylene) were produced on two different twin-screw extruders. Therefore,
    the machine-specific process behavior is of major interest regarding its influence.
    First, the fiber length change after processing was determined by experimental
    investigations and then simulated with the SIGMA simulation software. By comparing
    the simulation and experimental tests, important insights could be gained and
    the effects on fiber lengths could be determined in advance. The resulting fiber
    lengths and distributions were different, not only for different screw configurations
    (SC), but also for the same screw configurations on different twin-screw extruders.
    This may have been due to manufacturer-specific tolerances.</jats:p>
article_number: '3113'
author:
- first_name: Annette
  full_name: Rüppel, Annette
  last_name: Rüppel
- first_name: Susanne
  full_name: Wolff, Susanne
  last_name: Wolff
- first_name: Jan Philipp
  full_name: Oldemeier, Jan Philipp
  id: '56781'
  last_name: Oldemeier
- first_name: Volker
  full_name: Schöppner, Volker
  id: '20530'
  last_name: Schöppner
- first_name: Hans-Peter
  full_name: Heim, Hans-Peter
  last_name: Heim
citation:
  ama: Rüppel A, Wolff S, Oldemeier JP, Schöppner V, Heim H-P. Influence of Processing
    Glass-Fiber Filled Plastics on Different Twin-Screw Extruders and Varying Screw
    Designs on Fiber Length and Particle Distribution. <i>Polymers</i>. 2022;14(15).
    doi:<a href="https://doi.org/10.3390/polym14153113">10.3390/polym14153113</a>
  apa: Rüppel, A., Wolff, S., Oldemeier, J. P., Schöppner, V., &#38; Heim, H.-P. (2022).
    Influence of Processing Glass-Fiber Filled Plastics on Different Twin-Screw Extruders
    and Varying Screw Designs on Fiber Length and Particle Distribution. <i>Polymers</i>,
    <i>14</i>(15), Article 3113. <a href="https://doi.org/10.3390/polym14153113">https://doi.org/10.3390/polym14153113</a>
  bibtex: '@article{Rüppel_Wolff_Oldemeier_Schöppner_Heim_2022, title={Influence of
    Processing Glass-Fiber Filled Plastics on Different Twin-Screw Extruders and Varying
    Screw Designs on Fiber Length and Particle Distribution}, volume={14}, DOI={<a
    href="https://doi.org/10.3390/polym14153113">10.3390/polym14153113</a>}, number={153113},
    journal={Polymers}, publisher={MDPI AG}, author={Rüppel, Annette and Wolff, Susanne
    and Oldemeier, Jan Philipp and Schöppner, Volker and Heim, Hans-Peter}, year={2022}
    }'
  chicago: Rüppel, Annette, Susanne Wolff, Jan Philipp Oldemeier, Volker Schöppner,
    and Hans-Peter Heim. “Influence of Processing Glass-Fiber Filled Plastics on Different
    Twin-Screw Extruders and Varying Screw Designs on Fiber Length and Particle Distribution.”
    <i>Polymers</i> 14, no. 15 (2022). <a href="https://doi.org/10.3390/polym14153113">https://doi.org/10.3390/polym14153113</a>.
  ieee: 'A. Rüppel, S. Wolff, J. P. Oldemeier, V. Schöppner, and H.-P. Heim, “Influence
    of Processing Glass-Fiber Filled Plastics on Different Twin-Screw Extruders and
    Varying Screw Designs on Fiber Length and Particle Distribution,” <i>Polymers</i>,
    vol. 14, no. 15, Art. no. 3113, 2022, doi: <a href="https://doi.org/10.3390/polym14153113">10.3390/polym14153113</a>.'
  mla: Rüppel, Annette, et al. “Influence of Processing Glass-Fiber Filled Plastics
    on Different Twin-Screw Extruders and Varying Screw Designs on Fiber Length and
    Particle Distribution.” <i>Polymers</i>, vol. 14, no. 15, 3113, MDPI AG, 2022,
    doi:<a href="https://doi.org/10.3390/polym14153113">10.3390/polym14153113</a>.
  short: A. Rüppel, S. Wolff, J.P. Oldemeier, V. Schöppner, H.-P. Heim, Polymers 14
    (2022).
date_created: 2022-12-21T14:06:36Z
date_updated: 2023-11-30T14:33:53Z
department:
- _id: '9'
- _id: '367'
- _id: '321'
doi: 10.3390/polym14153113
intvolume: '        14'
issue: '15'
keyword:
- Polymers and Plastics
- General Chemistry
language:
- iso: eng
publication: Polymers
publication_identifier:
  issn:
  - 2073-4360
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Influence of Processing Glass-Fiber Filled Plastics on Different Twin-Screw
  Extruders and Varying Screw Designs on Fiber Length and Particle Distribution
type: journal_article
user_id: '44116'
volume: 14
year: '2022'
...