Current publications

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• Influence of graphite and SEBS addition on thermal and electrical conductivity and mechanical properties of polypropylene composites

  B. Krause, A. Cohnen, P. Pötschke, T. Hickmann, D. Koppler, B. Proksch, T. Kersting, Ch. Hopmann | Keywords: Polymer composites, electrical...

  01 Jul 2018

• Opportunities and challenges of profile extrusion dies produced by additive manufacturing processes

  N. Yesildag, Ch. Hopmann, C. Windeck, S. Bremen, K. Wissenbach, S. Merkt | Keywords: Profile extrusion, extrusion die, additive manufacturing,...

  01 Jul 2018

• Optimisation of the Compound Quality of CO2-based Rubber Compounds

  Ch. Hopmann, A. Lipski |Keywords: Rubber compounding, CO2-based

  rubber, vulcanisation, internal mixer, processability, adhesion | Published in: KGK...

  01 Jul 2018

• Properties of polyamide 6-graphene-composites produced and processed on industrial Scale

  N. Yesildag, Ch. Hopmann, M. Adamy, C. Windeck | Keywords:Compounding, Nanocomposites, Graphene, Polyamide 6, mechanical properties | Published in:...

  01 Jul 2018

• Introduction to Reactive Extrusion

  Ch. Hopmann, M. Adamy, A. Cohnen | Published in: Reactive Extrusion, Weinheim (2018), p. 3-9

  01 Jul 2018

• Structural Foams of Biobased Isosorbide-Containing Copolycarbonate

  S. Zepnik, D. Sander, S. Kabasci, Ch. Hopmann | Published in: International Journal of Polymer Science (2017), p. 1-5

  01 Jul 2018

• Compensating viscosity fluctuations in injection moulding

  M. Theunissen, Ch. Hopmann, J. Heinisch | Published in: AIP Conference Proceedings 1914, 090002 (2017); doi: 10.1063/1.5016748

  01 Jul 2018

• Development of a Highly Segmented Temperature Control in Injection Moulding for Reduced Warpage and Increased Process Stability

  Ch. Hopmann, M. Schmitz, M. Theunissen, P. Nikoleizig | Published in: AIP Conference Proceedings 1914, 140003 (2017); doi: 10.1063/1.5016768

  01 Jul 2018

• Production of Plastics Parts with Partially or Fully Metallic Surfaces using the In-Mould-Metal-Spraying (IMMS)

  Ch. Hopmann, P. Ochotta, M. Theunissen, S. Katmer, K. Bobzin, M. Öte, M. A. Knoch, X. Liao | Published in: AIP Conference Proceedings 1914, 140002...

  01 Jul 2018

• Investigation of the nucleation process and its effect on the foam structure in foam injection moulding

  Ch. Hopmann, M. Theunissen, D.Sander, Y. Zhang | Published in: Foams 2017 – 15th International Conference on Advances in Foam Materials & Technology,...

  01 Jul 2018

• Investigation on the transferability of algorithms for the numerical optimisation of cooling channel design in injection moulding on metal gravity die casting

  Ch. Hopmann, T. Schneppe, M. Theunissen, A. Bührig-Polaczek, N. Wolff | Thermal mold design, inverse heat conduction, cooling channel layout,

  heat...

  01 Jul 2018

• Novel discretisation methods for improved simulation precision in injection moulding

  V. Karyofylli, M. Behr, M. Schmitz, C. Hopmann | Keywords: Injection molding, Navier's slip boundary condition, simplex elements, space-time elements,...

  01 Jul 2018

• Combined learning processes for injection moulding based on simulation and experimental data

  Ch. Hopmann, S. Jeschke, T. Meisen, T. Thiele, H. Tercan, M. Liebenberg, J. Heinisch, M. Theunissen | Published in: 33rd International Conference of...

  01 Jul 2018

• Automatic Cooling Channel Design for Injection Moulds

  Ch. Hopmann, M. Theunissen, T. Schneppe, M. Schmitz | Published in: PPS Europe Africa Conference 2017, June 26 - 29, 2017, Dresden, Germany, pp. 1-6 ...

  01 Jul 2018

• Influence of residual stress on the adhesion and surface morphology of PECVD-coated polypropylene

  M. Jaritz, Ch. Hopmann, H. Behm, D. Kirchheim, S. Wilski, D. Grochla, L. Banko, A. Ludwig, M. Böke, J. Winter, H. Bahre, R. Dahlmann| Keywords: PECVD,...

  01 Jul 2018

• The lnfluence of Length and Curvature – Calculation of the Long-Term Behavior of lnjection Molded Long-Fiber-Reinforced Thermoplastic Components by Integrative Simulation

  M. Ersch, Ch. Hopmann | Published in: Injection molding. Integrative simulation, p.34- 38

  01 Jul 2018

• Tensile impact testing on polymer materials considering the force-oscillation phenomenon

  Ch. Hopmann, J. Klein, M. Schöngart | Keywords: force oscillations, material testing; impulsive load; dynamic properties; data logging | Published in:...

  01 Jul 2018

• Prediction of part geometry-dependent weld line strength in unreinforced polycarbonate

  Ch. Hopmann, J. Onken | Keywords: injection molding, interfaces, mechanical, modeling, polycarbonates, properties | Published in: Adv Polym Technol....

  01 Jul 2018

• Effective thermal properties of an isotactic polypropylene (a-IPP) injection moulded part by a multiscale approach

  G. Laschet, M. Apel, J. Wipperfürth, Ch. Hopmann, M. Spekowius, R. Spina | Keywords: Injection moulding, semi-crystalline polymer, homogenization,...

  01 Jul 2018

• Development of a dilatometer for shrinkage analysis of thermosetting resin systems

  Ch. Hopmann, P. N. Wagner, A. Böttcher | Keywords: Curing, cross-linking reaction, chemical shrinkage, thermal shrinkage, epoxy resin, liquid...

  01 Jul 2018

• Production of CFRP components with clear surface layer in the PU spray impregnation process

  Ch. Hopmann, C. Karatzias, R. Wagner, A. Boettcher, K. Fischer | Published: AIP Conference Proceedings 1914, 100001 (2017); doi: 10.1063/1.5016754

  01 Jul 2018

• Compression moulding of LFT components with increased quality by variothermal mould technology

  Ch. Hopmann, C. Beste, A. Boettcher, K. Fischer | Published in: AIP Conference Proceedings 1914, 180001 (2017); doi: 10.1063/1.5016787

  01 Jul 2018

• Development of a novel and adaptable injection unit for an automated and quality controlled manufacturing of RTM parts for aerospace applications

  Ch. Hopmann, M. L. Fecher, A. Boettcher, K. Fischer, L. Winkelmann | Published in: AIP Conference Proceedings 1914, 090001 (2017); doi:...

  01 Jul 2018

• Laser transmission welding of foamed thermoplastic injection moulded parts

  Ch. Hopmann, S. Kreimeier, M. Schöngart | Keywords: laser transmission welding, foamed parts, injection moulding | Published in: AIP Conference...

  14 Jun 2018

• Spatially resolved temperature measurement in injection moulding using ultrasound tomography

  Ch. Hopmann, J. Wipperfürth, M. Schöngart | Keywords: PVT-Diagram, temperature, tomography | Published in: AIP Conference Proceedings (2017) 1914,...

  17 Apr 2018

• Transport mechanisms of water vapour and oxygen through SiOx coated polypropylene

  D. Kirchheim, M. Jaritz, S. Wilski, Ch. Hopmann, R. Dahlmann | Keywords: PE-CVD, oxygen and water vapour transmission, permeation mechanisms |...

  17 Apr 2018

• Oxygen transport through thin PE-CVD coatings on polypropylene: stacking and temperature dependency

  Ch. Hopmann, N. Yesildag, D. Kirchheim, M. Jaritz, S. Wilski, R. Dahlmann | Keywords: Barrier, diffusion, permeation | Published in: ANTEC® 2017 –...

  17 Apr 2018

• Cost-efficient manufacturing of quality assured hybrid CFRP/GFRP-parts

  Ch. Hopmann, N. Magura, S. Stender, A. Böttcher, K. Fischer | Keywords: Composites, cost reduction, hybrid component | Published in: Proceedings of...

  17 Apr 2018

• Increasing surface properties by using an integrated screw-based additive and subtractive manufacturing process

  Ch. Hopmann, N. Lammert | Keywords: Additive manufacturing, hybrid manufacturing, melt deposition modeling | Published in: ANTEC® 2017 – Anaheim, CA,...

  21 Mar 2018

• Transport mechanisms through PE-CVD coatings: influence of temperature, coating properties and defect on permeation of Oxygen and water vapour

  D. Kirchheim, S. Wilski, M. Jaritz, F. Mitschker, M. Gebhard, M. Brochhagen, M. Böke, J. Benedikt, P. Awakowicz, A. Devi, Ch. Hopmann, R. Dahlmann |...

  13 Dec 2017

• Mechanisms of oxygen permeation through plastic films and barrier coatings

  S. Wilski, J.Wipperfürth, M.Jaritz, D. Kirchheim, F. Mitschker, P. Awakowicz, R. Dahlmann, Ch. Hopmann | Keywords: 3D-simulation, diffusion, PE-CVD |...

  13 Dec 2017

• Influence of PE-CVD and PE-ALD on defect formation in permeation barrier films on PET and correlation to atomic oxygen fluence

  F. Mitschker, S. Steves, M. Gebhard, M. Rudolph, L. Schücke, D. Kirchheim, M. Jaritz, M. Brochhagen, Ch. Hoppe, R. Dahlmann,

  M. Böke, J. Benedikt, l....

  13 Dec 2017

• Molecular dynamics simulation to predict the physical ageing of amorphous thermoplastics

  S. Koch, D. Alperstein, Ch. Hopmann | Keywords: polymer material, stress cracking potential, mechanical stress | Published in: ECCOMAS Young...

  13 Dec 2017

• Process control strategies for injection moulding processes with changing raw material viscosity

  Ch. Hopmann, J. Heinisch | Keywords: hot runner manifold, control algorithms, viscosity| Published in: Journal of Polymer Engineering 37 (2017) 180,...

  12 Dec 2017

• Online analysis of melt viscosity during injection moulding with a hot runner rheometer

  Ch. Hopmann, M. Theunissen, J. Heinisch | Keywords: heating channel, injection moulding optimisation, viscometer| Published in: Proceedings of the...

  12 Dec 2017

• Replication of micro-structured injection molds using physical vapor deposition coating and dynamic laser mold tempering

  Ch. Hopmann, K. Bobzin, Tobias Brögelmann, Magnus Orth, N. Kruppe, M. Naderi | Keywords: surface analysis, microstructures, temperature control|...

  12 Dec 2017

• Targeted solidification through self-optimising, highly segmented mould temperature control in injection moulding

  Ch. Hopmann, M. Schmitz | Keywords: component characteristic, precision, quality| Published in: International Polymer Science and Technology 44 (2017)...

  12 Dec 2017

• Variothermal foam injection moulding – lightweight products with high surface qualities

  Ch. Hopmann, N. Lammert, Y. Zhang | Schlagwörter: Surface technology, part quality, foam injection moulding | Published in: Cellular Polymers 36...

  12 Dec 2017

• Calculating the thermomechanical behaviour of plastic-metal hybrid components

  Ch. Hopmann, M. Ersch, J. van Haag | Keywords: material data, material description, integrative simulation method | Published in: ATZ Worldwide 119...

  20 Sep 2017

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