Works by Hopmann, Christian

Results: 117

Qualification of the Vitrimeric Matrices in Industrial-Scale Wet Filament Winding Processes for Type-4 Pressure Vessels.

Published in:

Polymers (20734360), 2025, v. 17, n. 9, p. 1146, doi. 10.3390/polym17091146

By:

Alms, Jonathan;
Sambale, Anna Katharina;
Fuchs, Jannick;
Lorenz, Niklas;
von den Berg, Nina;
Conen, Tobias;
Çelik, Hakan;
Dahlmann, Rainer;
Hopmann, Christian;
Stommel, Markus

Publication type:

Article

Influence of the Processing Conditions on the Morphology and the Mechanical Properties of Polyamide 6-Carbon Fibre-Carbon Nano Tube-Compounds.

Published in:

Macromolecular Symposia, 2014, v. 338, n. 1, p. 8, doi. 10.1002/masy.201100081

By:

Michaeli, Walter;
Hopmann, Christian;
Puch, Florian

Publication type:

Article

Injection Moulding of Highly Filled Soft Magnetic Compounds for the Production of Complex Electric/Electronic (Micro-) Parts.

Published in:

Macromolecular Symposia, 2014, v. 338, n. 1, p. 28, doi. 10.1002/masy.201100090

By:

Michaeli, Walter;
Hopmann, Christian;
Fragner, Jan

Publication type:

Article

Increasing the prediction quality of artificial neural network–based optimisation approaches for the sheet moulding compound compression moulding process by means of targeted expansion of training data.

Published in:

International Journal of Advanced Manufacturing Technology, 2024, v. 135, n. 1/2, p. 561, doi. 10.1007/s00170-024-14406-w

By:

Hopmann, Christian;
Hadenfeldt, Marie;
Neuhaus, Jonas;
Foerges, Dominik

Publication type:

Article

Induced network-based transfer learning in injection molding for process modelling and optimization with artificial neural networks.

Published in:

International Journal of Advanced Manufacturing Technology, 2021, v. 112, n. 11/12, p. 3501, doi. 10.1007/s00170-020-06511-3

By:

Lockner, Yannik;
Hopmann, Christian

Publication type:

Article

Design framework for model-based self-optimizing manufacturing systems.

Published in:

International Journal of Advanced Manufacturing Technology, 2018, v. 97, n. 1-4, p. 519, doi. 10.1007/s00170-018-1951-8

By:

Thombansen, Ulrich;
Buchholz, Guido;
Frank, Daniel;
Heinisch, Julian;
Kemper, Maximilian;
Pullen, Thomas;
Reimer, Viktor;
Rotshteyn, Grigory;
Schwenzer, Max;
Stemmler, Sebastian;
Abel, Dirk;
Gries, Thomas;
Hopmann, Christian;
Klocke, Fritz;
Poprawe, Reinhardt;
Reisgen, Uwe;
Schmitt, Robert

Publication type:

Article

Structural Foams of Biobased Isosorbide-Containing Copolycarbonate.

Published in:

International Journal of Polymer Science, 2017, p. 1, doi. 10.1155/2017/4308687

By:

Zepnik, Stefan;
Sander, Daniel;
Kabasci, Stephan;
Hopmann, Christian

Publication type:

Article

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

Published in:

Polymer Engineering & Science, 2024, v. 64, n. 1, p. 154, doi. 10.1002/pen.26536

By:

Mentges, Noah;
Çelik, Hakan;
Dahlmann, Rainer;
Hopmann, Christian

Publication type:

Article

Influence of material modification and fillers on the dimensional stability and warpage of polypropylene in screw‐extrusion‐based large area additive manufacturing.

Published in:

Polymer Engineering & Science, 2023, v. 63, n. 5, p. 1598, doi. 10.1002/pen.26309

By:

Austermann, Johannes;
Kuscera, Renata;
Wipperfürth, Jens;
Hopmann, Christian;
Dahlmann, Rainer

Publication type:

Article

Modeling flow and cell formation in foam sheet extrusion of polystyrene with CO2 and co‐blowing agents. Part I: Material model.

Published in:

Polymer Engineering & Science, 2021, v. 61, n. 11, p. 2799, doi. 10.1002/pen.25800

By:

Breuer, Robert;
Hendriks, Sven;
Reinhardt, Nicolas;
Facklam, Martin;
Hopmann, Christian

Publication type:

Article

Modeling flow and cell formation in foam sheet extrusion of polystyrene with CO2 and co‐blowing agents. Part II: Process model.

Published in:

Polymer Engineering & Science, 2021, v. 61, n. 10, p. 2701, doi. 10.1002/pen.25797

By:

Breuer, Robert;
Hendriks, Sven;
Reinhardt, Nicolas;
Facklam, Martin;
Hopmann, Christian

Publication type:

Article

Detection and evaluation of the fibers' deposition parameters during wet filament winding.

Published in:

Polymer Engineering & Science, 2021, v. 61, n. 5, p. 1353, doi. 10.1002/pen.25649

By:

Hopmann, Christian;
Magura, Nadine;
Rozo Lopez, Nicolas;
Schneider, Daniel;
Fischer, Kai

Publication type:

Article

Evaluation of healing models to predict the weld line strength of the amorphous thermoplastic polystyrene by injection molding simulation.

Published in:

Polymer Engineering & Science, 2021, v. 61, n. 3, p. 754, doi. 10.1002/pen.25614

By:

Onken, Jakob;
Verwaayen, Steffen;
Hopmann, Christian

Publication type:

Article

Predicting the damage development in epoxy resins using an anisotropic damage model.

Published in:

Polymer Engineering & Science, 2020, v. 60, n. 6, p. 1324, doi. 10.1002/pen.25383

By:

Müller, Jonas Maximilian;
Rozo Lopez, Nicolas;
Klein, Enzo Alexander;
Hopmann, Christian

Publication type:

Article

Limitations of Reptation Theory for Modeling the Stress‐Dependent Rheological Behavior of Polyethylene Terephthalate Above the Glass‐Transition Temperature.

Published in:

Polymer Engineering & Science, 2020, v. 60, n. 4, p. 765, doi. 10.1002/pen.25334

By:

Hopmann, Christian;
Twardowski, Benjamin;
Bakir, Can

Publication type:

Article

Influencing the environmental stress cracking resistance of amorphous thermoplastic parts by the example of polycarbonate and water.

Published in:

Polymer Engineering & Science, 2019, v. 59, p. E361, doi. 10.1002/pen.24984

By:

Hopmann, Christian;
Borchmann, Nikolai;
Koch, Simon;
Alperstein, David

Publication type:

Article

Extrusion foaming of thermoplastic cellulose acetate sheets with HFO‐1234ze and co‐blowing agents.

Published in:

Polymer Engineering & Science, 2018, v. 58, p. E182, doi. 10.1002/pen.24850

By:

Hendriks, Sven;
Hopmann, Christian;
Zepnik, Stefan

Publication type:

Article

Surface roughness and foam morphology of cellulose acetate sheets foamed with 1,3,3,3-tetrafluoropropene.

Published in:

Polymer Engineering & Science, 2017, v. 57, n. 4, p. 441, doi. 10.1002/pen.24440

By:

Hopmann, Christian;
Hendriks, Sven;
Spicker, Claudia;
Zepnik, Stefan;
van Lück, Frank

Publication type:

Article

Foam Extrusion of LDPE With Solid Phase CO2 as Blowing Agent.

Published in:

Polymer Engineering & Science, 2015, v. 55, n. 12, p. 2821, doi. 10.1002/pen.24173

By:

Hopmann, Christian;
Hendriks, Sven;
Feldges, Robert

Publication type:

Article

Challenges and research agenda for realizing a seamless integration of Digital Shadows into the production domain.

Published in:

Engineering Reports, 2023, v. 5, n. 4, p. 1, doi. 10.1002/eng2.12611

By:

Sapel, Patrick;
Hopmann, Christian

Publication type:

Article

Cross‐linking and foaming behavior of elastomers with water based blowing agents.

Published in:

Journal of Applied Polymer Science, 2021, v. 138, n. 39, p. 1, doi. 10.1002/app.51002

By:

Hopmann, Christian;
Kammer, Sebastian;
Facklam, Martin

Publication type:

Article

Water based blowing agents for rubber extrusion.

Published in:

Journal of Applied Polymer Science, 2020, v. 137, n. 46, p. 1, doi. 10.1002/app.49512

By:

Hopmann, Christian;
Kammer, Sebastian;
Facklam, Martin

Publication type:

Article

Development and processing of flame retardant cellulose acetate compounds for foaming applications.

Published in:

Journal of Applied Polymer Science, 2020, v. 137, n. 28, p. 1, doi. 10.1002/app.48863

By:

Breuer, Robert;
Zhang, Yuxiao;
Erdmann, Rafael;
Vernaez Hernandez, Oscar Eduardo;
Kabasci, Stephan;
Kostka, Melanie;
Reinhardt, Nicolas;
Facklam, Martin;
Hopmann, Christian

Publication type:

Article

Prozessoptimierte Hybridgarne für den Faserspritzprozess: Christina Scheffler, Janett Hiller, Matthias Krüger, Markus Stommel Leibniz-Institut für Polymerforschung Dresden e.V. (IPF), Dresden Vera Austermann, Erik Wilms, Kai Fischer, Rainer Dahlmann, Christian Hopmann Institut für Kunststoffverarbeitung (IKV) an der RWTH Aachen, Aachen

Published in:

Technical Textiles / Technische Textilen, 2023, n. 1, p. 20, doi. 10.51202/0323-3243-2023-1-020

By:

Scheffler, Christina;
Hiller, Janett;
Krüger, Matthias;
Stommel, Markus;
Austermann, Vera;
Wilms, Erik;
Fischer, Kai;
Dahlmann, Rainer;
Hopmann, Christian

Publication type:

Article

Individualized production in die-based manufacturing processes using numerical optimization.

Published in:

International Journal of Advanced Manufacturing Technology, 2015, v. 80, n. 5-8, p. 851, doi. 10.1007/s00170-015-7003-8

By:

Siegbert, Roland;
Yesildag, Nafi;
Frings, Markus;
Schmidt, Frank;
Elgeti, Stefanie;
Sauerland, Henning;
Behr, Marek;
Windeck, Christian;
Hopmann, Christian;
Queudeville, Yann;
Vroomen, Uwe;
Bührig-Polaczek, Andreas

Publication type:

Article

The Influence of Low-Pressure Plasma Treatments on the Lap Shear Strength of Laser-Joined AISI 304 Hybrids with Polypropylene and Polyamide 6.6.

Published in:

Applied Sciences (2076-3417), 2023, v. 13, n. 24, p. 13275, doi. 10.3390/app132413275

By:

Tillmann, Wolfgang;
Wojarski, Lukas;
Hopmann, Christian;
Fatherazi, Patricia;
Timmer, Christian

Publication type:

Article

Comparing pretraining methods with different fidelities for a 2D cooling problem in injection molding.

Published in:

Journal of Polymer Engineering, 2025, v. 45, n. 5, p. 447, doi. 10.1515/polyeng-2024-0228

By:

Wenzel, Manuel;
Raisch, Sven Robert;
Schmitz, Mauritius;
Hopmann, Christian

Publication type:

Article

Influence of plasticisation during foam injection moulding on the melt viscosity and fibre length of long glass fibre-reinforced polypropylene.

Published in:

Journal of Polymer Engineering, 2024, v. 44, n. 9, p. 695, doi. 10.1515/polyeng-2024-0104

By:

Hopmann, Christian;
Wolters, Jan

Publication type:

Article

Development of variotherm extrusion blow molding technology to produce high-gloss automotive spoilers.

Published in:

Journal of Polymer Engineering, 2023, v. 43, n. 5, p. 465, doi. 10.1515/polyeng-2023-0002

By:

Xiao, Cheng-Long;
Hopmann, Christian;
Kahve, Cemi E.

Publication type:

Article

Development of a methodical approach to set-up the injection velocity profile dependent on the part geometry.

Published in:

Journal of Polymer Engineering, 2023, v. 43, n. 5, p. 454, doi. 10.1515/polyeng-2022-0300

By:

Hopmann, Christian;
Köbel, Thilo

Publication type:

Article

Development of a cavity pressure control for injection moulding by adjusting the cross-section in the hot runner.

Published in:

Journal of Polymer Engineering, 2022, v. 42, n. 7, p. 644, doi. 10.1515/polyeng-2021-0225

By:

Hopmann, Christian;
Schöll, Matthias;
Dornebusch, Hanna

Publication type:

Article

Preparation of graphene-based compounds with improved dispersion by a two-stage production process.

Published in:

Journal of Polymer Engineering, 2019, v. 39, n. 4, p. 368, doi. 10.1515/polyeng-2018-0126

By:

Hopmann, Christian;
Adamy, Maximilian

Publication type:

Article

Analysis of the process influences on injection molded thermosets filled with hollow glass bubbles.

Published in:

Journal of Polymer Engineering, 2018, v. 38, n. 7, p. 695, doi. 10.1515/polyeng-2017-0347

By:

Hopmann, Christian;
Theunissen, Matthias;
Haase, Stefan

Publication type:

Article

Combination technology of deep drawing and back-moulding for plastic/metal hybrid components.

Published in:

Journal of Polymer Engineering, 2018, v. 38, n. 6, p. 583, doi. 10.1515/polyeng-2017-0354

By:

Hopmann, Christian;
Schild, Julian;
Wurzbacher, Simon;
Tekkaya, A. Erman;
Hess, Sigrid

Publication type:

Article

Process control strategies for injection molding processes with changing raw material viscosity.

Published in:

Journal of Polymer Engineering, 2018, v. 38, n. 5, p. 483, doi. 10.1515/polyeng-2017-0180

By:

Hopmann, Christian;
Heinisch, Julian

Publication type:

Article

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

Published in:

Journal of Polymer Engineering, 2018, v. 38, n. 3, p. 315, doi. 10.1515/polyeng-2017-0131

By:

Hopmann, Christian;
Bobzin, Kirsten;
Brögelmann, Tobias;
Orth, Magnus;
Kruppe, Nathan;
Naderi, Mona

Publication type:

Article

Thermal influences in the star-pre-distributor of a spiral mandrel die.

Published in:

Journal of Polymer Engineering, 2017, v. 37, n. 8, p. 837, doi. 10.1515/polyeng-2016-0405

By:

Hopmann, Christian;
Yesildag, Nafi;
Schön, Malte

Publication type:

Article

Numerical investigation of the temperature influence on the melt predistribution in a spiral mandrel die with different polyolefins.

Published in:

Journal of Polymer Engineering, 2016, v. 36, n. 7, p. 751, doi. 10.1515/polyeng-2015-0267

By:

Hopmann, Christian;
Yesildag, Nafi

Publication type:

Article

Mold technology for mass production of continuous fiber-reinforced sandwich parts.

Published in:

Journal of Polymer Engineering, 2016, v. 36, n. 6, p. 589, doi. 10.1515/polyeng-2015-0149

By:

Hopmann, Christian;
Wagner, Philipp N.;
Bastian,, Robert;
Fischer, Kai;
Böttcher, Arne

Publication type:

Article

Mesoscale simulation of the solidification process in injection moulded parts.

Published in:

Journal of Polymer Engineering, 2016, v. 36, n. 6, p. 563, doi. 10.1515/polyeng-2014-0223

By:

Spekowius, Marcel;
Spina, Roberto;
Hopmann, Christian

Publication type:

Article

In-mould graining of 3D-shaped parts with micro-structured surfaces.

Published in:

Journal of Polymer Engineering, 2016, v. 36, n. 6, p. 583, doi. 10.1515/polyeng-2015-0190

By:

Hopmann, Christian;
Martens, Jonathan

Publication type:

Article

Improved molding of micro structures using PVD-coated mold inserts.

Published in:

Journal of Polymer Engineering, 2016, v. 36, n. 6, p. 575, doi. 10.1515/polyeng-2015-0270

By:

Hopmann, Christian;
Bobzin, Kirsten;
Brögelmann, Tobias;
Schäfer, Christian;
Schöngart, Maximilian;
Röbig, Malte;
Naderi, Mona

Publication type:

Article

IMKS and IMMS: two methods for the production of plastic parts featuring metallic areas.

Published in:

Journal of Polymer Engineering, 2016, v. 36, n. 6, p. 549, doi. 10.1515/polyeng-2014-0281

By:

Hopmann, Christian;
Bobzin, Kirsten;
Schoeldgen, Roman;
Oete, Mehmet;
Wunderle, Johannes;
Linke, Thomas F.;
Ochotta, Philipp

Publication type:

Article

Application of a multilayer injection molding process for thick-walled optical components.

Published in:

Journal of Polymer Engineering, 2016, v. 36, n. 6, p. 557, doi. 10.1515/polyeng-2014-0259

By:

Hopmann, Christian;
Röbig, Malte

Publication type:

Article

Development of PP Compound Recipes Using Genetic Algorithms and Analytical Models.

Published in:

Polymers (20734360), 2025, v. 17, n. 8, p. 1059, doi. 10.3390/polym17081059

By:

Seifert, Lukas;
Leuchtenberger-Engel, Lisa;
Hopmann, Christian

Publication type:

Article

Model-Based Prediction of the Tensile Properties of Polypropylene Films Made from Recycled Materials.

Published in:

Polymers (20734360), 2025, v. 17, n. 8, p. 1044, doi. 10.3390/polym17081044

By:

Stieglitz, Marius;
Adomeit, Sonja;
Müller, Marisa;
Hettwer, Karina;
Schlierf, Anja;
Uhlig, Steffen;
David, Sarah;
Hopmann, Christian;
Leuchtenberger-Engel, Lisa

Publication type:

Article

Development of an Analytical Model for Predicting the Shear Viscosity of Polypropylene Compounds.

Published in:

Polymers (20734360), 2025, v. 17, n. 2, p. 126, doi. 10.3390/polym17020126

By:

Seifert, Lukas;
Leuchtenberger-Engel, Lisa;
Hopmann, Christian

Publication type:

Article

Development of an Analytical Model for Predicting the Tensile Modulus of Complex Polypropylene Compounds.

Published in:

Polymers (20734360), 2024, v. 16, n. 23, p. 3403, doi. 10.3390/polym16233403

By:

Seifert, Lukas;
Leuchtenberger-Engel, Lisa;
Hopmann, Christian

Publication type:

Article

Computational Analysis of the Micromechanical Stress Field in Undamaged and Damaged Unidirectional Fiber-Reinforced Plastics Using a Modified Principal Component Analysis.

Published in:

Polymers (20734360), 2024, v. 16, n. 21, p. 3000, doi. 10.3390/polym16213000

By:

Lopez, Nicolas Rozo;
Çelik, Hakan;
Hopmann, Christian

Publication type:

Article

Comparison of Hybrid Machine Learning Approaches for Surrogate Modeling Part Shrinkage in Injection Molding.

Published in:

Polymers (20734360), 2024, v. 16, n. 17, p. 2465, doi. 10.3390/polym16172465

By:

Wenzel, Manuel;
Raisch, Sven Robert;
Schmitz, Mauritius;
Hopmann, Christian

Publication type:

Article