TY - CHAP A1 - Sigrüner, Michael A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - Investigation of the Bonding Behavior of Modified Polypropylene to a Concrete Matrix by Single Fiber Pull Out Tests BT - Amsterdam, Netherlands, 29 September – 1 October 2020 T2 - SAMPE Europe Conference Proceedings 2020 KW - Polypropylene KW - Single fiber pull-out test Y1 - 2020 ER - TY - GEN A1 - Muscat, Dirk A1 - Moser, Stefan T1 - Offenlegungsschrift DE102008060087A1 N2 - Die Erfindung betrifft eine Brust­prothese, die aus einem schalenförmigen Körper aus einem weich-elastisch eingestellten Kunststoff besteht, der in Kunststoffolien zu einer oder mehreren Kammern einge­schweißt ist. Erfindungsgemäß wird das Füllmaterial mit polymeren Farbstoffen eingefärbt. Die Erfindung betrifft weiterhin ein Verfahren zum Färben von Brustprothesen. KW - Brustprothese Y1 - 2021 ER - TY - GEN A1 - Grischa, Günther A1 - Schildhauer, Stefan A1 - Muscat, Dirk T1 - Offenlegungsschrift DE102012106391A1 BT - Verfahren zur Einbettung von Dekor-Körpern in eine Polymer-Matrix N2 - Ein Verfahren zur Einbettung von Dekor-Körpern in eine Silikongummi-Matrix umfasst das Auf­tragen einer ersten aushärtbaren Polysiloxanzusammenset­zung auf eine Grundplatte und Angelieren der ersten Po­lysiloxanzusammensetzung; das Aufbringen der Dekorkör­per auf die angelierte erste Polysiloxanzusammensetzung; das Ausfüllen von Zwischenräumen zwischen den Dekorkör­pern mit einer zweiten aushärtbaren Polysiloxanzusammen­setzung; und das Aushärten der Polysiloxanzusammenset­zungen zu einer transparenten Polysiloxan-Matrix mit dar­in eingebetteten Dekor-Körpern. Ein weiteres Verfahren zur Einbettung von Dekor-Körpern in eine Silikongummi-Matrix umfasst das Auftragen einer aushärtbaren Polysiloxanzu­sammensetzung auf eine Grundplatte und Aufbringen der Dekor-Körper vor dem Angelieren der ersten Polysiloxan­zusammensetzung; das Einsinkenlassen der aufgebrach­ten Dekor-Körper in die aushärtende Polysiloxanzusammen­setzung derart, dass die aufgebrachten Dekor-Körper von der Polysiloxanzusammensetzung vollständig umschlossen werden; und das Aushärten der Polysiloxanzusammenset­zungen zu einer transparenten Polysiloxan-Matrix mit den darin eingebetteten Dekor-Körpern derart, dass eine Mehr­zahl der eingebetteten Dekor-Körper von der Polysiloxanzu­sammensetzung vollständig umschlossen bleibt. KW - Polymer-Matrix Y1 - 2021 ER - TY - GEN A1 - Muscat, Dirk A1 - Voit, Johann A1 - Hefenbrock, Sophia T1 - Patentschrift DE102015014912B4 BT - Beschichtung für ein medizinisches Instrument, Verfahren zu dessen Beschichten und mit diesem Verfahren beschichtetes medizinisches Instrument N2 - Beschichtung für ein medizinisches In­strument, das nach seinem Einführen in einen menschlichen oder tierischen Körper mit dessen Körperflüssigkeit in Kon­takt gelangt, umfassend eine Materialzusammensetzung, die wenigstens ein Phosphorylcholin umfassendes Polymer enthält, dadurch gekennzeichnet, dass die Materialzusam­mensetzung für ein medizinisches Instrument, das auf sei­ner Oberfläche Polyurethan enthält oder das daraus gänzlich besteht, eine auf das medizinische Instrument aufbringba­re Haftungsvernetzungsschicht aus einem chemischen Haft­vermittler und einem mit diesem vernetzten Alkohol, min­destens einem zweiwertigen Alkohol mit zwei primären OH­Gruppen, und das wenigstens eine Phosphorylcholin um­fassende Polymer enthält, welches auf der Haftungsvernet­zungsschicht als gesonderte Schicht aufgebracht sowie auf dieser und gegebenenfalls mit dieser vernetzt ist. KW - Beschichtung Y1 - 2021 ER - TY - GEN A1 - Muscat, Dirk A1 - Moser, Stefan A1 - Reusch, Michaela T1 - Europäische Patentschrift EP2133042B1 KW - Brustprothese Y1 - 2021 ER - TY - JOUR A1 - Sigrüner, Michael A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - Investigation on pull‐out behavior and interface critical parameters of polymer fibers embedded in concrete and their correlation with particular fiber properties JF - Journal of Applied Polymer Science N2 - A crucial problem in concrete engineering is the corrosion of steel reinforcements. Polymer fibers as alternative reinforcement material can prevent corrosion; however, high adhesion to concrete and good fiber mechanics are necessary for polymers to be considered as an alternative reinforcement. This study tested different thermoplastic polymer materials to evaluate their level of adhesion to concrete. The adhesion properties of different self‐drawn polymer fibers were analyzed by extracting the fibers from concrete using single fiber pull‐out test (SFPT). To determine the adhesion mechanism, different polymer properties were analyzed and correlated to SFPT. Strong evidence was found that the fibers mechanical properties correlate with SFPT. Roughening the fiber surface increases the SFPT results significantly. While highly polar materials can support the adhesion process, a clear correlation could not be found. This study identifies high stiffness and roughness as the crucial properties of polymer fibers used in concrete engineering. If these factors can be engineered into the fiber, polymer fibers can present an alternative to steel in concrete reinforcement. KW - extrusion KW - fibers KW - mechanical properties KW - surfaces and interfaces KW - thermoplastics Y1 - 2021 UR - https://doi.org/10.1002/app.50745 VL - 138 IS - 28 SP - 50745 ER - TY - GEN A1 - Grischa, Günther A1 - Muscat, Dirk T1 - Veröffentlichte Internationale Patentanmeldung WO2012156349A3 BT - VERFAHREN ZUR HERSTELLUNG VON GEGENSTÄNDEN MIT IN GIESSHARZ EINGEGOSSENEN INKLUSIONEN, SOWIE GEGOSSENE GEGENSTÄNDE KW - Giessharz Y1 - 2021 ER - TY - CHAP A1 - Sigrüner, Michael A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - Influencing the bonding ability of polypropylene fibers to concrete by blend hydrophilization and reactive functionalization T2 - IUPAC MACRO2020+, 48th World Polymer Congress, 16. - 21. May 2021 KW - polypropylene fibers KW - concrete Y1 - 2021 ER - TY - CHAP A1 - Herz, Jonas A1 - Sigrüner, Michael A1 - Krekemeyer, Markus A1 - Kazmi, Monis A1 - Schuster, Jens A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - INVESTIGATION OF AN INNOVATIVE WOOD-PLASTIC HYBRID LAID FABRIC FOR THE REPLACEMENT OF STEEL REINFORCEMENTS IN CONSTRUCTIONS T2 - SAMPE Europe 2021 Conference, Baden/Zürich, 29. - 30. Sept. 2021 KW - wood-plastic hybrid fabric Y1 - 2021 ER - TY - GEN A1 - Strübbe, Nicole A1 - Dirk, Muscat A1 - Zenz, Vitus ED - European Patent Office, T1 - DEVICE FOR THE PRODUCTION OF BIOPOLYMERS FROM BIOMASS (EP4130532A1) N2 - Pressure lock (10), extruding apparatus (50) for high pressure extrusion, process for producing biopolymers from biomass and use of the extruding apparatus for a process for producing biopolymers from biomass allowing continuous operation of a high pressure process. KW - Pressure KW - Extrusion Y1 - 2023 ER - TY - CHAP A1 - Herz, Jonas A1 - Sigrüner, Michael A1 - Walter, David A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - Coextruded Polymeric Bicomponent Fibers for Concrete Reinforcements T2 - SAMPE Europe Conference Proceedings 2022, Hamburg, 15. - 17. Nov. 2022 KW - Coextrusion KW - Bicomponent Fibers KW - Concrete Reinforcement KW - Polypropylene Y1 - 2022 ER - TY - CHAP A1 - Zenz, Vitus A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - Development of a new granulate feeding system for gas pressurized extrusion processes T2 - ANTEC 2023 N2 - One major problem of a continuous process like plastic extrusion is their incapability to deal with non-local gas pressure. This is an inherent problem because a continuous process has an open end in the feeding port where pressure can escape. In this study a novel feeding system was developed to enable granulate feeding into gas pressurized processes inside a single- or twin-screw extruder. With this apparatus gas pressure can be applied inside the extrusion process. The apparatus separates the pressurized extruder from the dosing equipment that feeds the extruder. It keeps the pressure inside the system while continuously feeding new material into the process. A small-scale prototype was designed for proof-of concept. The small size of the prototype was able to handle small amounts of granulates of around 100 - 200 g/h. An applied gas pressure of 8 bar was achieved. In future optimizations, throughput can be increased and maximum applied gas pressure towards 15-20 bar. KW - Plastic feeding KW - Granulate KW - Extrusion KW - Compounding KW - Reactive Extrusion Y1 - 2023 PB - SPE ANTEC ER - TY - JOUR A1 - Zenz, Vitus A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - So wird Bernsteinsäure aus Holzreststoffen gewonnen JF - Plastverarbeiter N2 - Die effiziente Umwandlung von lignocellulosehaltiger Biomasse wie Restholz ist eine wissenschaftliche sowie technologische Herausforderung weltweit. Die Technische Hochschule Rosenheim entwickelt gemeinsam mit Partnern ein neues Verfahren zur Herstellung von Bernsteinsäure aus Holzreststoffen. KW - Bernsteinsäure KW - Reaktive Extrusion Y1 - 2023 VL - 2023 IS - 04 SP - 22 EP - 25 PB - Hüthig GmbH CY - Heidelberg ER - TY - CHAP A1 - Schusser, Verena A1 - Sigrüner, Michael A1 - Bogner, Stefan A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - Effect of Fillers on the Mechanical Properties of Drawn Polypropylene Fibers T2 - International Conference on Composite Materials Belfast 2023 (ICCM 23), 30 July - 4 August 2023 KW - Filler Reinforcement KW - Filament KW - Fiber Draw Down Y1 - 2023 ER - TY - CHAP A1 - Herz, Jonas A1 - Sigrüner, Michael A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - Co-extruded polymer fibers for concrete reinforcement T2 - Proceedings of the 37th International Conference of the Polymer Processing Society (PPS-37) N2 - Corrosion of steel reinforcements in concrete constructions is a big topic for the building industry. Polymeric materials are a possible alternative due to their ability to withstand corrosion. To replace steel reinforcements, fibers with high mechanical properties and a good bonding ability between fiber and concrete are needed. Today different approaches for concrete reinforcement by polymer fibers have been investigated. The bonding ability of the fibers can be increased by mechanical anchoring, e.g. crimped or embossed fibers, as well as by a chemical bonding between concrete and fiber surface. To realize the requirements of high mechanical properties and a good bonding behavior, a fiber that is drawn from a co-extruded filament shall be produced and tested. The filament owns an innovative core-shell-structure. The core maintains the fiber-stiffness and the tensile strength while the shell allows using another material to affect the bonding behavior of the fiber. This study shows the usage of fibers with differing shell materials to examine their influence on the mechanical properties of the fiber in total and the adhesion abilities to concrete. As core material, an unfilled polypropylene (PP) is used. The shell materials are varied using different polymers e.g. polypropylene or ethylene acrylic acid copolymer, as well as two PP based compounds filled with wood particles and calcium carbonate blended with a maleic anhydride based coupling agent. The mechanical properties of the fibers are tested by fiber tensile tests to compare the younǵs modulus and the tensile strength. The influence of the shell phase on the bonding ability to concrete is evaluated by the interfacial shear strength calculated from single fiber pull-out tests. Microscopy is used to interpret changes before and after pull-out. The results depict incredible positive effects and allow new insights in possible materials for fiber reinforced concrete constructions. KW - polymer fibers KW - concrete reinforcement KW - coextrusion KW - core shell fiber Y1 - 2023 U6 - https://doi.org/10.1063/5.0168511 VL - 2884 IS - 1 ER - TY - JOUR A1 - Sigrüner, Michael A1 - Hüsken, Götz A1 - Pirskawetz, Stephan A1 - Herz, Jonas A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - Pull-out behavior of polymer fibers in concrete JF - Journal of Polymer Science N2 - The bond between polymer fibers and the surrounding cementitious matrix is essential for the development of concrete reinforcement. The single fiber pull-out test (SFPT) is the standard characterization technique for testing the bond strength. However, the different phases of debonding cannot be distinguished by the SFPT. This study investigates the debonding of different polymer fibers from the surrounding cementitious matrix with a modified SFPT and proposes methods to change the SFPT setup to generate more valuable information on the debonding mechanism. The SFPT was equipped with linear variable differential transformers (LVDT), digital image correlation (DIC) and acoustic emission (AE) analysis. The results demonstrate that the modified SFPT allows a better understanding of the different phases of debonding during fiber pull-out. Furthermore, bond strength values calculated by different methods reveal that the chemical bond of the investigated polymers is not different as reported by previous studies. Deformation measurements performed using LVDTs and DIC are suitable measuring techniques to characterize the debonding mechanism in SFPT. A correlation between recorded AE and debonding phases was not found. KW - acoustic emission KW - bond behavior KW - polymer fibers KW - pull-out Y1 - 2023 U6 - https://doi.org/10.1002/pol.20230264 VL - 61 IS - 21 SP - 2708 EP - 2720 ER - TY - CHAP A1 - Herz, Jonas A1 - Lorenz, Katharina A1 - Muscat, Dirk A1 - Strübbe, Nicole T1 - Polymeric core-shell and mono-material fibers for concrete reinforcement T2 - AIP Conference Proceedings N2 - A reinforcement of concrete structures is needed because of the low tensile strength of concrete. Corrosion of the usually used steel reinforcments cause issues during time. Therfore, alternative reinforcements produced from non-corosive materials - like polymer fibers - become more interesting. A polymer fiber has to reach high mechanical properties and a good bonding ability to concrete. Both properties can be influenced by the selection of polymer and the used production process. Two polymers, polypropylene and aliphatic polyketone are tested within this study. First mono-material fibers of each material are produced and tested, later the materials are combined in a core-shell fiber. All fibers are produced by standard extrusion or coextrusion and a later drawing process. The mechanical properties are determined by tensile tests. The calculation of interfacial shear strength from single fiber pull-out tests allows an evaluation of the bonding ability. Additionally, fiber surface before and after pull-out is examined using reflected light microscopy. Contact angle measurements are done to evaluate possible influences of the surface energy and polarity. Density measurements are used to compare weight potential of the different mono-material and core-shell fibers. The results show good mechanical properties for all fiber materials. The interfacial shear strength is ≈ 2-3 times higher for fibers with polyketone compared to the ones with polypropylene at the fibers surface, which can be explained by higher surface energy and polarity of the polyketone compared to polypropylene and different surface deformation during pull-out. Lower densities are reached by fibers containing polypropylene. KW - polymer fibers KW - concrete reinforcement KW - core-shell fiber KW - coextrusion KW - polypropylene KW - polyketone Y1 - 2024 U6 - https://doi.org/10.1063/5.0204946 VL - 3158 IS - 1 ER - TY - RPRT A1 - Beneken, Gerd A1 - Dih, Denise A1 - Fried, Adrian A1 - Hauch, Julia A1 - Hummel, Sabine A1 - Junker, Elmar A1 - Karlinger, Peter A1 - Köster, Heinrich A1 - Krause, Harald A1 - Muscat, Dirk A1 - Niedermaier, Peter A1 - Schäfle, Claudia A1 - Schutter, Sabina A1 - Sigrüner, Michael A1 - Stanzel, Silke A1 - Strübbe, Nicole A1 - Werndl, Peter A1 - Wirnsberger, Markus A1 - Zentgraf, Peter T1 - Jahresbericht 2018, Forschung - Entwicklung - Innovation N2 - Mit dem jährlich erscheinenden Forschungsbericht möchte die Technische Hochschule Rosenheim einen Einblick in ihre vielfältigen Projekte und Aktivitäten der angewandten Forschung und Entwicklung geben. Im Jahresbericht 2018 wird über Vorhaben im Jahr 2018 berichtet. T3 - Schriftenreihen - Forschungsbericht - 7 KW - Forschung Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:861-opus4-12374 ER -