Ausstattung / Equipment Prof. Wilhelm with short descriptions
Here you find a list of the equipment of Prof. Wilhelm including pictures and description. A short tabular overview you can find here.
These methods are available for service measurement of industry or other institutes for a limited extend. Please contact directly one of the professors (see "polymer chemistry - contact") or the specific contact person of the method of interest.
Synthesis of polymers
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Anionic Synthesis Two vaccum lines for anionic synthesis allows the chemical synthesis of model polymers, especially for complex morphologies like block copolymers, star polymers or com polymers. |
Polymer processing
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Labstation, Brabender Brabender extruder (Single screw, properties: D=19mm, L=250mm, Tmax=400°C) |
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Haake Minilab, Thermo Scientific Haake Minilab: Mini Extruder for sample amount as small as 5 g. Equipped with double screws for better mixing, used for model compound or composite materials |
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Haake MiniJet Pro, Thermo Scientific Haake Minijet Pro: injection molding machine for lab scale, starting from sample amounts as low as 2 ml. In combination with the Haake MiniLab, an extruder in lab scale (see left side of picture), we can produce also composites or blends. |
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custom built SFT-High Pressure Reactor, Supercritical Fluid Technologies SFT-High Pressure Reactor: High pressure 100 ml stainless steel vessel with supercritical fluid pump and temperature control unit for batch foaming experiments operating with scCO2 up to 10,000 psi (690 bar) and a max. temperature of 200 °C. Nucleation can be induced either in a one-step foaming process by sudden depressurization or in a two-step foaming process by rapidly heating the saturated sample outside of the reactor in a hot oil bath. |
Mechanical characterisation of polymers
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ARES-G2, TA-Instruments
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DHR3, TA Instruments Equipped with magnetic bearing, double optical encoder for the deformation and a force rebalance transducer, the DHR3 offers a minimum detectable torque resolution of about 0.05nNm and a displacement of 2nrad. The available Peltier element offers a range of temperatures from 40°C to 200°C. |
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ARES, TA Instruments Rheometer with high sensitivity for high viscosity, e.g. Polymer melts |
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DHR1, TA-Instruments /> Contact Person: Daniel Zimmermann Rheometer DHR1 for liquids and polymer melts, stress-controlled. Mainly used in the practical course or for measurements of liquids. |
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SISV100, Scarabaeus Rubber tester from Scarabaeus: |
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Caber, HAAKE (Thermo Scientific) Haake Capillary Breakup Extensional Rheometer (CABER) |
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Rheotester 2000, Goettfert Capillary rheometer (Goettfert) for extremely high shear rates, equipped with pressure sensors to detect conditions for "shark-skin" and related effects. |
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Rheograph 50, Goettfert Capillary rheometer (Goettfert) for extremely high shear rates (up to 6 Mill 1/s) and high sensitivity |
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Dielectric Analyzer, Novocontrol Dielectric spectrometer: Detection of molecular motion under shear
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Eplexor 150N, Gabo Gabo Explexor: Dynamic mechanical material testing with high forces and high frequencies: |
Combined Methods
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Self-construction, Rheo-NMR: Correlated information about molecular mobility and mechanical properties. Application examples: Curing of Rubber, Shear induced crystallisation |
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Self-construction: Correlated information about local mobility (size scale nm-range) and mechanical properties. Also conductive materials can be analyzed with this method. |
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Self-construction, Correlated information about molecular size and chemical composition. One part of the self-developed 3-dimensional spectroscopy: dim1:Size via SEC, dim2: chemical composition via SEC-FTIR or SEC-NMR, dim3: topology, endgroups via SEC-IR-QCL |
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Self-construction, Correlated information about molecular size and special chemical groups. One part of the self-developed 3-dimensional spectroscopy: dim1:Size via SEC, dim2: chemical composition via SEC-FTIR or SEC-NMR, dim3: topology, endgroups via SEC-IR-QCL |
Classical polymer characterisation
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Agilent 1200 series, Polymer standard service (PSS) Size exclusion chromatography (german: Gelpermeationschromatographie, GPC) Triple Detection: Standard concentration detector either UV or RI-Detector, plus viscosity detector and MALLS-detector (multi-angle-laser-light-scattering) for measurement of unkonwn samples or samples with no available calibration curve. |
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Vertex 70, Bruker Bruker Vertex 70 for FT-IR spectroscopy |
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S3-Micro, Hecus X-ray systems Due to start up money from the Barner-Kowollik group and in a joint effort we are happy to have access to Small-angle X-ray scattering (SAXS) for determination of structure and interaction in solution and ordering in melt and solids, point focus and 2D-Dectection |
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TA Q-200, TA Instruments Differential scanning calorimetry (TA-Instruments Q200) for temperature depending behaviour of polymer and other materials, |
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Spinsolve 60, Magritek The Magritek Spinsolve 60 NMR spectrometer sets a new standard for 60MHz benchtop NMR instruments. The Spinsolve 60 spectrometer provides high quality 1H NMR spectra in seconds and is based on permanent magnets, therefore no liquid nitrogen or helium is needed for the operation. |
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MQ20 (2x), Bruker Bruker Minspec mq20 in two different implementations |
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DnDc2010, Particle Standard Service (PSS) Measurement of optical contrast, e.g. dn/dc for solutions of polymers allowing a high number of different solvents. |
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ALV/CGS-3 Goniometer System, ALV, Germany Static Light scattering for determination of molecular weight, radius of gyration and second virial coefficient |
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Nicomp 380 DLS, Particle Sizing Systems (PSS) Dynamic Light Scattering Spectrometer Nicomp 380 DLS from Particle Sizing Systems |
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Zeiss Axiophot, Zeiss Optical Zeiss Microscope with digital video camera |
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Keyence VHX 900F Digital microscope for surfaces (incident light microscope) with µm-resolution and an impressiv depth of field due to features as automatic focus stacking. Enlargement rand reaching from 1:1 up to 2000:1. It's the perfect complement to our Zeiss transmission microscope. |
