Figure 3_relevant part of the sliced sample and position of the cutting planes along th rotor axis

Visualisation of the Flow paths

Flow Paths in a tangential internal Mixer as Optimisation Possibilities for Mixing of Rubber Compounds

The quality of a rubber compound is dependent on the rubber, fillers, additives, crosslinking-chemicals as well as the mixing process. Many rubber compounds can be produced in internal mixers. The visualisation of the flow paths in a tangential internal mixer gives the opportunity to analyse the mixing procedure. The flow paths are investigated as a […] more...

March 19. 2020 - Research news

Unbenannt

Crosslinking density and structure

Investigations on isothermal and two-stage non-isothermal Vulcanization of Isoprene Rubber

The two-stage non-isothermal vulcanization of Nd-IR with SEV system was studied by determining the residual crosslinking, reversion activation energy, and concentration of zinc stearate of compounds. Maximum torque and the time used were analyzed combined with crosslink density and structure after the 2nd stage. It is suggested that more zinc stearate is generated at higher […] more...

March 18. 2020 - Research news

Fig. 1: SEM micrograph of NPCC.

Cure Characteristics and mechanical Properties

Comparative Study on the Effect of Nano Precipitated Colloidal Calcium Carbonate and Carbon Black on the Properties of Natural Rubber Vulcanizates

The central objective of the present research is to find a suitable alternative for carbon black in tyre formulations. Nano CaCO3 is now-a-days widely used as filler in rubber. The effect of fatty acid modified nano precipitated colloidal CaCO3 (NPCC) as reinforcing filler on mechanical and thermal properties of natural rubber (NR) vulcanizates were studied […] more...

March 17. 2020 - Research news

Masaesa_Figure 1_1

Rubber Process Oils

Influence of aromatic Con­tent in Rubber Process Oils on Properties of natural Rubber/Butadiene Rubber (NR/BR) Blends for Tyre Sidewall Component

Influences of rubber process oils (RPOs) loading and aromatic carbon content (%CA) on properties of black filled natural rubber/butadiene rubber blends are of interest. The %CA of RPRs is controlled prior to being incorporated into rubber mixes, so that its effect on physico-chemical properties of RPO, rheological properties, cure characteristics and mechanical properties of rubber […] more...

March 16. 2020 - Research news

Fig. 2: Epoxy + Sand

Epoxy-Nano-Composites

Tribological Performance of Automotive Friction Nano Composites: Epoxy/Silica/Cu

An experimental investigation carried out to study the effect of epoxy based composites filled by contents of nanoparticles of sand and copper on the tribological behavior in term of friction coefficient and wear. A pin-on-disc tester was used in investigation. Results showed that the presence of the nanoparticles of sand improved the friction coefficient of […] more...

February 18. 2020 - Research news

Fig. 1: Schematic diagram of interaction of Silica with TESPT/ PDMS-OH / PIBSA.

Tire Rubber Componding

Effect of a Polydimethylsiloxane and Polyisobutylene Succinic anhydride on the mechanical and dynamic Properties of Silica filled SBR Compounds

The effect of addition of hydroxyl terminated polydimethylsiloxane (PDMS-OH) and polyisobutylene succinic anhydride (PIBSA) on the dispersion of silica in E-SBR (emulsion polymerised SBR) is investigated. E-SBR / silica compounds with hydroxyl terminated polydimethylsiloxane (PDMS-OH) and poly -isobutylene succinic anhydride were prepared and characterized for static, dynamic and morphological properties. Addition of PDMS-OH and PIBSA […] more...

February 13. 2020 - Research news

Tire abrasion is a source of so-called microplastics in the environment. Copyright: cunaplus/Stock.Adobe.com

ENR – a sustainable Rubber Solution for Tire Formulations

Epoxidized Natural Rubber with Surface-modified Silica as a Filler

The current discussion about environmental influences of microplastics and tire-road wear grew interest in naturally grown rubber as a replacement for synthetic rubber recently. Besides Natural Rubber in its variety of grades special rubbers with a high glass transition temperature are needed to produce acceptable properties for many applications. Epoxidized Natural Rubber (ENR) could be a candidate. The use of tailor-made surface-modified silica grades in ENR greatly improves abrasion values. more...

February 12. 2020 - Tires in

Abb. 1: Metall-Kunststoff-Verbund mit einer elastischen Zwischenschicht (Hart-Hart-Verbund); Abbildung aus Bräuer et al. [1].

Lightweight -Design with Elastomers

Metal-Plastic-Composites with an elastic intermediate Layer – Production by means of Press-Injection Molding Process or Sandwich-Injection Molding

Metal-plastic composites are promising components for lightweight constructions. The paper deals with metal-plastic composites with an elastic interface layer of polyurethane with different thicknesses. The introduction of such a plane and adhesively bonded elastic interface layer enables the production composites of metals and thermoplastics with very high bond strength. The composites are made by compression […] more...

February 10. 2020 - Research news

Fig. 1: PRI of raw NR and NR with varying amounts of copper compounds (in logarithmic coordinates).

Ageing due to Rubber Poisons

The Role of Copper Compounds as Thermooxidation Catalysts

Oxygen in the air is responsible for the thermooxidation of rubber and is catalysed by “rubber poisons”, mainly by copper and manganese compounds. In this study, a variety of copper compounds were used such as copper stearate, copper oxide and copper sulphate. They were mixed with rubber. The thermooxidation of the rubber was evaluated using […] more...

February 5. 2020 - Research news

Fig. 3: The PDMS filament at the glass ball     close to the point where the energy to remove glass ball is maximal. Note the formation of many thin polymer strings close to the glass ball. This probably result from cavity formation and stringing as  typically observed for pressure-sensitive adhesives (soft rubber compounds).

Physical Phenomena in Rubber Seals

Fluid Dynamics at the Interface between Soft Elastic Solids

The present publication reviews results of a joint project between Forschungszentrum Jülich (FZJ) and Leibniz-Institut für Polymerforschung Dresden e. V. (IPF) about fluid dynamics at the interface of soft elastic solids, i.e. crucial physical phenomena in rubber seals. We performed adhesion and friction studies for a set of well prepared and broadly characterized technical rubbers […] more...

February 3. 2020 - Research news

Der Konzeptreifen ‚Large & Narrow‘ von Bridgestone gehört zu einer neuen Reifenkategorie, durch die Autos noch mehr Kraftstoff als bisher einsparen können; zudem hat der Reifen eine leicht verbesserte Nasshaftung (Bild: Bridgestone)

Bridgestone announces Susym – a Polymer that Bonds Rubbers and Resins on the Molecular Level

Bridgestone Corporation announced that the name for the world's first polymer that bonds rubbers and resins on the molecular level is Susym. The next-generation polymer material can be used not only for tyres but also in other applications. more...

December 17. 2019 - News

Fig. 9: Transmission light microscopy image on an undeformed rubber foil (thickness ≈ 200 µm) of compound R2. The numbered ground rubber particles were used for the measurement of the particle strain.

Rubber-Recycling

Modification of Ground Rubber with Conventional Fillers by Process Engineering

Carbon black loaded elastomer materials were ground into small rubber particles and covered in situ with conventional fillers like carbon black and hydrophobated silica. more...

December 11. 2019 - Research news

Verkleinert_70 Prozent_Bild 1_Handyhalter Butterfly

Simulation unterstützt Prozessverständnis

Simulation for 2K-Processing

Die Konstruktion von Spritzgieß-Werkzeugen für Mehrkomponentenanwendungen erfordert die ganze Erfahrung der Werkzeugbauer. Wenn es sich dabei noch um eine Thermoplast-plus-Flüssigsilikon-Anwendung handelt, ist eine sorgfältige thermische Auslegung für einen stabilen Prozess unerlässlich. Zur Unterstützung dieser Auslegung kommen moderne Simulationsansätze zum Einsatz, um so die Werkzeugänderungen auf ein Minimum zu reduzieren. Der Beitrag zeigt diese Möglichkeiten anhand des “Butterfly“ - eines Handyhalters aus Polycarbonat und Flüssig- silikonkautschuk, der für die K 2019 designt wurde. more...

December 11. 2019 - Tires in

Fig. 1: An experimental testing machine for uniaxial stressing of elastomer samples.

Education in Elastomer-Physics

Experimental testing Machine for Elastomers for Educational Purposes and Didactics

This article describes the design, construction and operation of an experi­mental testing machine as part of student works, and deals with the sequence and results of a series of elastomer samples. more...

December 10. 2019 - Research news

Fig. 1: Experimental setup of high-pressure capillary rheometer test.

Mooney-Geiger-Method

Navier’s slip Coefficient Determination of Silicone Rubber Compound by means of High- Pressure Capillary Rheometer

The unique properties of silicone rubber, such as high heat and chemical resistance are the main reasons for its growing importance in the industry [1]. more...

December 10. 2019 - Research news

Loader-Icon