MOSCOW (MRC) -- Evonik Industries, a leading specialty chemicals manufacturer, is in plans to facilitate bulk production of composites, reported the company on its site.
Composites are made of extremely strong fibers embedded in a polymer (plastic). The polymer primarily determines the composite processing. Hybrid polymer systems are the heart of Evonik’s innovation - they combine good processability of thermoplastic polymers and good mechanical properties of thermosetting plastics.
But, the production of composites is still complex and costly. Since late 2014, Evonik demonstrates in pilot plants at its Marl site that the material concept of hybrid polymer systems can save time and costs in manufacturing composites. First potential customers have already received samples for testing. First hybrid polymer systems are expected to be ready for the market in 2018.
"Our technology will help to significantly reduce manufacturing costs for composites," says Chief Innovation Officer Ulrich Kusthardt with conviction, adding that "We want to contribute to leading the way to bulk production of composites." Evonik that already offers numerous innovative products for composites wants to continue strengthening its position in this growth market.
The company is aiming for sales in the lower triple-digit million euro range in the composites market in the medium term. For the market of carbon fiber-reinforced plastics alone, CCeV, a network of companies and research institutes in the fiber composites field, is expecting stabile annual growth of an average of 9 percent by 2020.
Composites are a key technology for lightweight design because of their ability to combine very good mechanical properties and low weight. Their processing properties are mainly determined by the polymer. Thermosetting plastics have very good mechanical properties but do require longer processing times compared to thermoplastic materials. But then again, thermoplastic polymers are easy to process, quick to reshape and to recycle, however, they rarely demonstrate the excellent mechanical properties of thermosetting plastics.
There is a reason for the very different properties: polymer chains in thermosetting plastics are crosslinked whereas in thermoplastics they are not. Switching between crosslink and no link is usually not possible because a chemical crosslinking process is irreversible.
However, this is exactly what Evonik achieved in cooperation with the Karlsruhe Institute of Technology in producing hybrid polymer systems. They are able to crosslink without using catalysts in a completely reversible process. Heating causes de-crosslinking and allows the system to be reshaped. During the cooling phase, the crosslink is created again and its shape becomes stabile.
A special Diels-Alder reaction causes this phenomenon where the crosslink is almost chemically switched on and off. Material properties are maintained even with repeated heating and cooling.
As MRC reported earlier, Essen-based Evonik Industries is making an investment in the double-digit-million euro range in a new research center at the Rheinfelden site.
Evonik, the creative industrial group from Germany, is one of the world leaders in specialty chemicals. Its activities focus on the key megatrends health, nutrition, resource efficiency and globalization. Evonik benefits specifically from its innovative prowess and integrated technology platforms. Evonik is active in over 100 countries around the world. In fiscal 2014 more than 33,000 employees generated sales of around EUR12.9 billion and an operating profit (adjusted EBITDA) of about EUR1.9 billion.
MRC