Ausgewählte Publikationen in Fachmedien

Nicht nur Kunststoffe, sondern auch Flammschutzmittel sollen nachhaltiger werden. Eine Möglichkeit dafür stellen Biobasierte Flammschutzmittek dar. Solche am Fraunhofer LBF entwickelte Additive zeigen, dass sich damit ein effektiver Flammschutz errreichen lässt. Teilweise sind dafür dank synergistischer Effekte sogar nur geringe Gehalte notwendig.

Linear economy models are no longer acceptable for the plastic industry and a change to a sustainable circular plastic economy must take place. In the field of thermoplastic foams, the biopolymer poly(lactic acid) (PLA) is a suitable alternative for fossil based foams like polystyrene. However, the production of PLA bead foams is still a challenge. In regards to circular plastic economy products, a reduction of the needed polymer additives is aspired to simplify the union of end-of-life plastic streams. Flame retardants (FR) are required in many applications and are often the largest proportion of additives. It turns out that the removal of FRs, for example the removal of the REACh registered FR hexabromocyclododecane for polystyrene foams, requires a great effort. This paper shows that PLA bead foams require no FR to achieve a class E classification for construction products. Therefore, nine PLA types are analyzed by differential scanning calorimetry, thermogravimetric analysis, gel permeation chromatography, and rheotens measurements. From five types, PLA bead foams could be produced with two different densities. In addition, PLA bead foams containing 1.5 wt% alkoxy amine FR were produced. The flammability of the PLA bead foams was investigated by LOI, DIN-4102-1-B2, and cone calorimeter tests.

Thermoplastic elastomers (TPE) are finding increasing use, as both manufacturers and processors come under constant pressure to innovate. A major disadvantage of TPE as compared with conventional vulcanizates is their tension set, which it has now been possible to minimize by post-crosslinking of the elastomer phase. This opens up opportunities for processors to develop further applications for commercially available TPE.

The electrical & electronics industry is increasingly requiring eco-friendly flame retardant solutions for the plastics used in these sectors. Halogen-free and polymeric flame retardants are driving innovation here.

Flame retardants are undoubtedly the plastics additives with the highest growth rate and by far the most attractive research and development prospects. The total market for flame retardants is estimated to grow from its present consumption of more than 2 million tat annual growth rates of 5 % to a value of 7.15 billion USD by 2021....

Das Phänomen der Reibkorrosion spielt bei Bauteilverbindungen, die zyklischen Belastungen unterliegen, eine wichtige Rolle, da sie einen erheblichen Einfluss auf das Schwingfestigkeitsverhalten oder die Minderung der Schwingfestigkeit der Bauteile hat. Im Folgenden sollen allgemeine Einflussfaktoren auf das Verhalten von Bauteilen unter Reibkorrosion erörtert werden. Es werden Ergebnisse aus Wöhler- und Betriebsfestigkeitsversuchen zweier Werkstoffgruppen vorgestellt sowie der Einfluss der Gestalt des Rad-Nabe-Verbunds in Versuchen im zweiaxialen Radprüfstand (ZWARP) beschrieben.

Additives for improving the quality of recycled materials are now established products and a permanent fixture in many a company's product portfolio. With the right additives, such as stabilizers, compatibilizers and reactive additives, recycled materials can attain a level of properties that enables them to compete with virgin materials.