In order to make a material more efficacious, that is, to make its property profile wider or deeper, the current condition of the material must be ascertained using suitable material testing methods. In plastics engineering, a plastic orginates from a preparation process, initially through an innovation combination of polymers and additives. Furthermore, material engineering also aims at predicting the material behavior in practice. Therefore, the IKT researches on complex material models that, for example, depict time and temperature behavior realistically.
- 60 million tons of ligning per year remain from papermaking
- Lignin is one of the most occur biopolymer in the world
- Use of this sustainable an biobased resource by new technologies
- Development of lignin-compounds for the production of high-quality components by laser sintering
- Material Development with a customized processing window for laser sintering
- Development of the production process for the laser sintering powders
- More and more filled plastics are available for 3D printing
- Yet, most 3D printers aren’t designed for filled plastics
- Developing new design tools to optimize 3D printing processes
- First-time simulation of highly filled plastics in 3d printing
- Developing new models and simulation approaches
- Integral treatment of material and process simulation
- Increasing storage densities of heat stores
- Improving storage concepts for heat supply
- Enhancing and optimization of sorption heat stores
Work of IKT
- Selecting suitable adsorbens with high storage densities
- Producing honeycombs with suit-able adsorbens and geometries
- Fraunhofer ISE, Freiburg
- Karlsruhe Institute for Technology (KIT)
- University of Stuttgart
- Technical University of Waldau
- ZAE Bayern, Garching
- Use of heat stores basing on zeolite and water
- Using zeolitic pellets in fixed beds as sorption materials
- Fixed beds suffer from high pressure losses when flown through
- Formation of dust while use can damage system components or block pores of the adsorbend leading to worse soorption behavior
- Zeolitic honeycombs do not suffer from this problems
- Low pressure losses while flown through
- No dust formation during service
- Kinetics adjustable
- Polyamides are brittle in dry condition
- Impact modification with rubber
- Loss of stiffness
- Development of an impact modifier with low reduction of stiffness
- Synthesis of a PA 6/polyether-block copolymer
- Use as an impact modifier in PA 6 blends
- Increase of the impact strenght
- Low reduction of stiffness
- Simultaneous enhancement of both toughness and stiffness properties of PA 6 by means of ternary material systems
- Potential of nanostructured filler materials for PA 6
- Microstructure simulation of nanoscale composites (DFG-Gemeinschaftsprojekt mit IMWF, Univ. Stuttgart)
- Incorporation of nanostructured filler materials
by melt compounding
- New filler/matrix-interaction
- Identification of suitable morphologies
- Development of simulation models (partner IMWF)
- Improving toughness/ stiffness balance of polyamid 6
- Application of a nanostructured polyamide 6/ polyether-blockcopolymer as impact modifier
- Stiffness enhancement by incorporation of nanostructured organoclays
- Correlation of morpohology with properties
- For extrusion of thick-walled pipes the melt viscosity of standard PA 66 is to low: „sagging“-effect
- High molar mass / viscous PA 66 types are quite limited on the market and very expensive
- Development of a concept to modify the molar mass of standard PA 66
- rheological researches
- Increasing of melt viscosity by a chain extension process with PA 66
- Reactive extrusion process with a co-rotating twin-screw extruder
- Maintenance of mechanical properties
- Cast polyamides have got high molecular weights and are used for highly stressed components
- Waste volume is up to 30 %
- Typically thermal recycling
- Compounding cast polyamide waste into materials for extrusion or injection molding
- Reactive compounding on a twin-screw extruder
- Selection of suitable additives
- Modification of the process
- Tailoring the properties of the materials
- Plastics are durable, versatile and can be produced in a cost-efficient way.
- This becomes a disadvantage if plastics get into the environment in an uncontrolled and massive manner.
- Major discharge paths are the so-called littering and secondary raw fertilizer.
- Great durability and high resistance on land and in waters lead to accumulations - seas and soils become a sink
- Development of new and existing methods for the identification and quantification of plastics in terrestrial systems (remote sensing, in situ ...).
- Development of plastics with environmentally optimized degradability (primary biodegradation).
- Investigation of the effect of plastic contamination on the meso- and micro-soil-fauna as well as the microbial degradability.
- Investigation of social perception and patterns of behavior in dealing with plastics.
- microscopically small plastic particles enter the environment
- Further fragmentation/degradation creates so-called secondary plastic particles
- So-called primary plastic particles are already produced in microscopic size and e.g. used in peelings and toothpaste
- Microorganisms in the sea, like water fleas take these particles in so that they can become part of the food chain
- Investigation of the impact on marine organisms
- Analysis of the behaviour of microscopic particles from bioplastics
- Due to faulty consumer behaviour, plastic waste enters the environment and the sea.
- Standard plastics such as PP, PE or PET are very resistant and virtually non-biodegradable (~ 1000 years).
- Biodegradable plastics such as PLA are increasingly used in plastic applications.
- So far the biodegradability is only certified for conditions on land.
- degradation behaviour, i.e. degradation speed, tendency to fragmentation is not known in marine environment
- Investigation of the degradation behaviour in different marine zones
- Investigation of the resulting degradation products with regard to their toxic effect and the influence of typical additives
- Increase in thermal conductivity leads to anisotropic properties
- In most cases, the thermal conductivity in the thickness direction is the lowest
- Increase of thermal conductivity in thickness direction
- Influencing the filling material orientation during processing
- Alignment of fillers in thickness direction
- Increase of thermal conductivity in thickness direction
- The critical strain is a plastic-suited design parameter.
- The critical strain is the stain which occurs the first injury in the component.
- The critical strain can currently only be determined very laboriously.
- Development of a new, fast method for determining the critical strain.
- Determination of the first injury
- Use of sound emission analysis
- Determination of critical strain in a short-time tensile test