Which plastic is right for what application and how technically safe these products and construction units manufactured from plastics are can only be answered using informative measurement and test methods. The Federal Institute for Materials Research and Testing (BAM) works on the development of methods which answer these questions. BAM presents its know-how in the field of plastics at the K 2007 fair from 24 to 31 October in Hall 4, Booth D14, in Düsseldorf.
BAM has developed highly realistic methods for simulating the degradation process of plastics in a few months using accelerated testing. For this purpose the plastics are exposed to aggressive media, e.g. diluted acids or bases, at elevated temperatures and increased pressures. So a realistic estimate for the expected life span of geosynthetics in the soil has to be provided using this method. Geosynthetics are one of a number of materials used for slope stabilisation or in road construction where the strength needed must be maintained over many decades. It is controlled by the chemical structure of the plastics which can be impaired or destroyed under the effect of water and oxygen in the soil.
An ultrasound method developed by BAM now enables the on-line monitoring and control of the hardening process of plastics which contain glass or carbon fibres. These strengthened plastics are increasingly being used because of their high mechanical load bearing capacity and their low weight in high-tech construction units in the aeronautical and space industry and in car manufacture. The construction units are produced from liquid resin at temperatures between 100 °C and 200 °C by a chemical reaction. At a given chemical composition the hardening process determines the chemical structure of the plastic. This affects strength and eventually the technical safety. Hardening time plays a crucial role: it must be neither too long nor too short. If it is too short, mechanical stability is not guaranteed. If it is too long, the product is too expensive since a long hardening time does not improves characteristics any further.
A special importance is attributed to the flame retardation of plastics under the heading of technical safety within the public realm. Work is being carried out in BAM to clarify and understand the burning and flame retardation mechanisms of plastics where thermal decomposition of plastics and pyrolysis products are investigated and the fire risk is determined. The findings should be integrated into the development of new flame-retarded products.Information:
Dr. Ulrike Rockland | idw
A new tool for discovering nanoporous materials
23.05.2017 | Ecole Polytechnique Fédérale de Lausanne
Did you know that packaging is becoming intelligent through flash systems?
23.05.2017 | Heraeus Noblelight GmbH
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy