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Poster Presentation

Modeling the Viscosity of Silicone Rubber During High-Speed Infrared Curing

Sunday (01.01.2040)
00:00 - 08:30
Part of:
Line-Up:
- Poster Presentation The European user access program nanoscience foundries and fine analysis (NFFA) 0 Dr.-Ing. Thomas F. Keller
- Poster Presentation Sarcoma osteogenic-like Saos-2 cells on the silica nanofibres coated with nanodiamond 1 Marie Steinerova
- Poster Presentation Sputtered, micro structured freestanding FeMn foils as biodegradable material 0 Till Jurgeleit
- Poster Presentation Exploring the effects of organic components on the degradation of magnesium in vitro under physiological conditions 1 Ph.D. Ruiqing Hou
- Poster Presentation Influence of laser treatment on the corrosion behavior of Mg-1Zn-1Ca and Mg-3Zn-0.3Ca alloys 1 Ph.D. Nuria Pulido González
- Poster Presentation PLA based CaCO3 composite fibers for textile scaffolds in hard tissue regeneration 1 Dr.-Ing. Claudia Hinüber
- Poster Presentation Functionalization of polymer fibers with heparan sulfate as a representative of the extracellular matrix 1 Inga Wille
- Poster Presentation Development and Characterization of Hybrid Hydrogel Based on Oxidized Alginate and Keratin for Tissue Engineering Applications 0 Supachai Reakasame
- Poster Presentation Nir Laser-responsive Folate-targeted Gold Nanorods As Efficient theranostic tool for Osteosarcoma Treatment 1 Ph.D. Nicol? Mauro
- Poster Presentation Mechanical properties of recent CAD/CAM polymer materials 1 Sebastian Spintzyk
- Poster Presentation Multilayers of Nanoparticles with Alginate, Chondroitin sulfate and Hyaluronic acid for graded implants 1 Steffen Sydow
- Poster Presentation Design of drug eluting ophthalmic lenses through a multi-layer approach 1 Dr. Ana Topete
- Poster Presentation Drug loaded silicon based soft contact lenses: effect of terminal sterilization methods on their performance 1 Andreia Sofia Oliveira
- Poster Presentation Investigating the compressibility of spray dried alumina-zirconia granules for use in orthopaedics - an easy to use and fast method 1 Dr. Ranko Adjiski
- Poster Presentation Biochemical modification of extruded protein nanofibers 1 Karsten Stapelfeldt
- Poster Presentation Microfibers and Nanoparticles with Controlled Dimensions of a Hyaluronic Acid Derivative 1 Ph.D. Calogero Fiorica
- Poster Presentation Modeling the Viscosity of Silicone Rubber During High-Speed Infrared Curing 1 Jan Stieghorst
- Poster Presentation Effect of the pH of bleaching H2O2 solutions in the enamel morphology, hardness and color 1 Dr. Ana Topete
- Poster Presentation New crosslinking diluents for dental materials 1 Prof. Dr. Norbert Moszner
- Poster Presentation Microstructure and Properties of Plasma Sprayed Bioactive Glass Ceramics Coatings 1 Annamária Dobrádi
- Poster Presentation Impact of chloride ions on apatite mineralisation on Bioglass® 45S5 0 Juliane Brandt-Slowik
- Poster Presentation In vivo performance of polymeric photodynamic active biomaterials for periodontal regeneration 1 Dr. Stefan Kranz
- Poster Presentation Adjusted material-cell interaction using engineered spider silk proteins 1 Vanessa Trossmann
- Poster Presentation Cellular interactions with extruded protein nanofibers 1 Naiana Suter
- Poster Presentation Antimicrobial efficacy of strontium and zinc glasses and glass ionomer cements against clinically relevant bacteria 0 Hawshan Mustafa
- Poster Presentation Mechanical properties of water-soluble polyvinyl alcohol parts fabricated by fused deposition modelling 1 Jochen Kuttig
- Poster Presentation Corrosion behavior of dental CoCr alloys made by different digital workflow processes compared to cast CoCr alloys 0 Christine Schille
- Poster Presentation Mechanical properties of biocompatible polymer-based resin for dental applications fabricated by stereolithography 1 Phan Hai-Binh Bui

Session P.2: Poster Session 2
Belongs to:
Topic P: Postersession


For the treatment or diagnose of neural diseases like deafness or epilepsy, silicone-rubber-based implants are available in several standard sizes. Although these implants fit to idealized anatomies, they do not perfectly fit to the individual anatomy of each patient. To overcome this, we developed a layer by layer 3D printing process for typically used viscous “medical grade” silicone rubber materials. To cure the printed silicone rubber an infrared high-speed-curing system (1) is used, which heats up the printed silicone rubber instantly and thereby cures the initially viscous silicone rubber material before it spreads out during the curing process. To optimize the fabrication accuracy and resolution of this system, a time-temperature profile for the curing process should be evaluated, where the spreading of the silicone rubber material is minimal. Therefore, further knowledge about the rheological behavior of the silicone rubber is mandatory. As the spreading dynamics of polymeric liquids depends in general on the viscosity of the polymeric liquid (2), a rheology model was developed which correlates the infrared heat-related temperature profile of the printed silicone rubber with its curing-related viscosity rise and its temperature related viscosity fall. Two typical silicone rubbers (Silpuran 2430, Wacker Chemie AG and Sylgard 184, Dow Corning GmbH) were characterized with a vulcameter at different isothermal temperatures (20°C - 60°C). Their isothermal behavior was correlated via an empirical viscosity expression by using a two-stage Arrhenius equation. To cope with a realistic nonisothermal curing process, a time-temperature integral for the degree of cure was introduced into the isothermal model. Good correlations between the nonisothermal model and the vulcameter measurements at different heat rates (5 K/min - 60 K/min) were observed, giving the ability to optimize the time-temperature profile of the curing system to the rheological behavior of the silicone rubber.

 

Speaker:
Jan Stieghorst
Hannover Medical School
Additional Authors:
  • Prof. Dr. Theodor Doll
    Hannover Medical School, Cluster of Excellence Hearing4all