Neues aus der Forschung

Additive & Füllstoffe

Cellulose: Ein nachwachsender, verstärkender Füllstoff für Elastomere. Sphärische und fasrige Cellulose-Typen im Vergleich zu konventionellen Füllstoffen

Die untersuchten sphärischen und fasrigen Tencel®-Cellulosetypen sind verstärkende Füllstoffe in Elastomeren und eine umweltfreundliche Alternative zu fossilen Rohstoffen. Im Vergleich zum reinen Füllstoff kann beim partiellen Ersatz von Ruß oder Kieselsäure durch beide Cellulosen eine deutlich niedrigere Mooney-Viskosität erreicht werden, was eine energieeffizientere Verarbeitung während des Mischprozesses gewährleistet. Der Einsatz des fasrigen Cellulosetyps ermöglicht wesentlich […] mehr...

4.April 2013 - Neues aus der Forschung

Kautschuke

New Fluorcarbon Rubber Compound (FKM) developed for prolonged Contact with the latest Generation of oils

In some cases, such as for engine oils,additional functions are required suchas cooling, corrosion protection,cleaning and suspension of pastysludge formed during the use of theengine. These characteristics can beobtained only by modifying the basicoils (synthetic or mineral) through theuse of special chemicals. In view of allthe above, a first and simple assessmentof the compatibility of […] mehr...

7.März 2013 - Neues aus der Forschung

Additive & Füllstoffe

The Effect of Protein Content in Natural Rubber on Performance of Silica Filled Compounds as Influenced by Processing Temperature

The use of a bi-functional silane coupling agent enhances the interaction between silica and apolar rubbers such as Natural Rubber (NR). The paper focusses on the influence of non-rubber constituents such as proteins on the properties of silica-filled NR compounds at varying mixing dump temperatures. The work demonstrates that when high amounts of proteins are […] mehr...

7.März 2013 - Neues aus der Forschung

Kautschuke

Evaluation of robustness of tire design through a fuzzy finite element analysis

Simulation tools based on the Finite Element Method (FEM) play a significant role in the development of new products, like e.g. in the tire industry. FEM tire simulations deliver a deterministic quantity for a system response for a set of deterministic input parameters. A consideration of uncertain input parameters can be achieved using an uncertainty […] mehr...

7.März 2013 - Neues aus der Forschung

Kautschuke

Novel functionalized Synthetic Rubbers for Tire Applications

Functionalized synthetic rubbers need to be selected for the production of low rolling resistance tires also having well balanced wet skid & abrasion resistance properties. The synthetic rubber business of Styron operating in the area of synthetic rubber, particularly SSBR, SBR, high and low cis-polybutadiene, is constantly extending the production volume and the scope of […] mehr...

7.März 2013 - Neues aus der Forschung

Additive & Füllstoffe

Effect of Nickel Content on Mechanical, Electrical, Thermal and Free-Volume Properties of PVC Composites

Polyvinyl chloride composites filled with nickel powder (0 to 40 wt %) have been prepared. The composites properties were studied in terms of electrical, thermal, mechanical and positron annihilation lifetime. It has been found that the permittivity, the dielectric loss and electrical conductivity of PVC composites increases by increasing nickel content. By increasing nickel content […] mehr...

7.März 2013 - Neues aus der Forschung

TPE

Elastomeric Closures for Parenteral Applications

Parenteral drug preparations are sterile preparations intended for administration by injection, infusion or implantation into the human or animal body [1]. Especially for injection and infusion applications very often elastomeric closures are used to guarantee the seal integrity of the entire drug package. This article gives an insight into the required property profile of such […] mehr...

11.Februar 2013 - Neues aus der Forschung

Additive & Füllstoffe

Naturally Occurring Amino Acids: A Suitable Substitute of N-N/- Di-phenyl Guanidine (DPG) in Silica Tyre Formulation?

N-N/- di-phenyl guanidine (DPG) in combination with cyclohexyl benzothiazole sulfenamide (CBS) is widely used as an accelerator for the vulcanization of silica filled solution styrene butadiene rubber (S-SBR). The vulcanizates thus obtained exhibit excellent mechanical properties, good dynamic properties and also good aging resistance property. However, the use of DPG is a bit restricted of […] mehr...

11.Februar 2013 - Neues aus der Forschung

Simulation & Entwicklung

Constitutive Description of green Rubber Material for Forming Simulation

The aim of the author’s work is the description of rubber forming and production processes. During the manufacturing of rubber based products, the elastomeric material is formed under high pressure and temperature and, subsequently, the products are cured until the material is completely crosslinked. Subsequently, the rubber product has its required and final features. In […] mehr...

11.Februar 2013 - Neues aus der Forschung

Kautschuke

Graphite and Copper Nanoparticles in PVC/NBR Composites

Polyvinyl Chloride (PVC) was blended with nitrile-butadiene rubber (NBR) in different ratios. The influence of different concentrations of nanosized filler (graphite and copper) on the properties of PVC/NBR blends using solution casting method was studied. The results obtained from the mechanical properties show that elongation at break increases with increasing NBR content in the (PVC/ […] mehr...

11.Februar 2013 - Neues aus der Forschung

Additive & Füllstoffe

Magneto-Rheological Elastomers with switchable mechanical Properties

Magnetic elastomer composites based on SBR and NR have been compounded and characterized in order to observe the potential changes in mechanical properties in the presence of an external magnetic field. Micron-sized carbonyl iron and manganese zinc ferrite particles of a variety of sizes as well as nano-sized particles composed of an iron oxide were […] mehr...

11.Februar 2013 - Neues aus der Forschung

Viskosität von radikalisch polymerisierten Oligoisprenen

Viscosity of Oligoisoprenes Obtained by Radical Polymerization

The viscosity of oligoisoprenes obtained by radical polymerization in alcohol solutions with hydrogen peroxide as initiator has been measured at various temperatures and rates of shear. It was established that the invariant dependency of shear stress and viscosity do not depend on molecular weights and functionalities. The identity of oligoisoprenes appears in the activation energy […] mehr...

7.Dezember 2012 - Neues aus der Forschung

Reibeigenschaften von Gummioberflächen mit zylindrischen Noppen und Löchern auf Keramik

Frictional Behaviour of the Cylindrical Protrusions and Holes in Rubber Surfaces Sliding on Ceramics

The present work aims to investigate the effect of introducing holes as well as protrusions in the rubber surface on friction coefficient when sliding against ceramics. The comparative frictional behaviour of the cylindrical protrusions and holes in rubber surfaces sliding on ceramics under dry, water, water-detergent, sand and water contaminated by sand sliding conditions is […] mehr...

7.Dezember 2012 - Neues aus der Forschung

INDEX 2012

Autoren- und Artikel-Verzeichnis 2012

Inhaltsverzeichnis aller wissenschaftlichen Fachartikel der KGK 2012 mehr...

7.Dezember 2012 - Neues aus der Forschung

Eigenschaftsvergleich von Nitril- Styrol-Butadienkautschuk mit Verschnitten aus Styrol- Butadien Kautschuk und Nitrilkautschuk

Comparison on Properties of Acrylonitrile Styrene Butadiene Rubber (NSBR) and Styrene Butadiene Rubber (SBR) / Nitrile Rubber (NBR) Blends

Compounds and vulcanisates of acrylonitrile- styrene-butadiene rubber (NSBR) were prepared, and their properties were compared with those of conventional blends between styrene butadiene rubber (SBR) and acrylonitrile-butadiene rubber (NBR). Results reveal discrepancy in cure behaviour of NSBR from SBR/NBR blends to some extent, i.e., the NSBR yields inferior crosslink density to the SBR/NBR blends, and […] mehr...

7.Dezember 2012 - Neues aus der Forschung

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