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

Pyrolyse Ruß, eine Möglichkeit für die Gumminidustrie

Pyrolysis Carbon Black, an Opportunity for the Rubber Industry

Pyrolysis Carbon Black (CBp) have gained interest during the last decade. The paper is aimed to summarize the analytical aspects of the CBp and to discuss the feasibility and meaning of the various carbon black tests performed on this material. In addition it will focus on the actual practical usage of the CBp carbon black […] mehr...

7.November 2012 - Neues aus der Forschung

Einsatz von Haselnussöl und epoxidiertem Haselnussöl als Weichmacher für NBR und CR

Investigation of Plasticizer Effect of Hazelnut Oil and its Epoxidized Derivative on Chloroprene and Nitrile Rubbers

In this study, the use of hazelnut oil (HaO) and epoxidized hazelnut oil (EHaO) as plasticizers in acrylonitrile butadiene rubber (NBR) and polychloroprene rubber (CR) was investigated. Tensile properties, glass transition temperatures, swelling charasteristics in polar liquids of the compounds of HaO and EHaO were determined. Oil swelling performance was better with EHaO and not […] mehr...

9.Oktober 2012 - Neues aus der Forschung

Einfluss von Ofenruß auf die dielektrischen und Mikrowellen- Eigenschaften der Chloroprenkautschuk- Verbundwerkstoffen

Effect of Furnace Carbon Black on the Dielectric and Microwave Properties of Chloroprene Rubber Composites

In this paper, the dielectric and microwave properties of chloroprene rubber (CR) based composites comprising different amounts of furnace carbon black in the range 0-100 phr have been investigated in the frequency range from 1 to 12 GHz. In the frequency range from 1 to 8 GHz the values of the dielectric permittivity and dielectric […] mehr...

9.Oktober 2012 - Neues aus der Forschung

Einfluss der Struktur und Orientierung auf die Festigkeit von 3D Bauteilen

Impact of Structure and Building Orientation on Strentgh of 3D printed Models

The main objective of research was to determine the impact of internal lattice-shaped structure and building orientation (longitudinal and base alignment) on the tensile strength of 3D printed samples. Results of tensile test revealed that the honeycomb structured samples built by orienting along axis Y and aligned over their thinner bases exhibit the highest strength. […] mehr...

9.Oktober 2012 - Neues aus der Forschung

Eine experimentelle Studie im hörbaren Frequenzbereich an magnetsensitivem Gummi

Investigation in the audible Frequency Range of magnetosensitive Rubber

An experimental study is conducted where the prestrain dependence of magnetosensitive rubber in the audible frequency range is studied along with the dependence of the dynamic strain amplitude, frequency and magnetic field strength. The material is natural rubber with a 33% volume particle fraction of irregularly shaped iron metal particles. The results show that with […] mehr...

9.Oktober 2012 - Neues aus der Forschung

Eigenschaften von gereinigtem peroxidisch vernetztem Naturkautschuk

Properties of Peroxide Cured Highly Purified Natural Rubber

Highly purified natural rubbers (HPNR) were prepared by saponification of fresh latex (FL-latex) in the presence of surfactant. It was found that nitrogen content markedly decreased from 0.86% to 0.1% after the process. Nitrosamine free vulcanized rubber could be prepared by peroxide curing system to give a same level of physical properties as those of […] mehr...

9.Oktober 2012 - Neues aus der Forschung

Neuartiges Konzept zur experimentellen Bestimmung der dynamischen Rissausbreitung in Elastomeren

A New Testing Concept for Determination of Dynamic Crack Propagation in Rubber Materials

The present paper proposes a new fracture mechanical testing concept for determination of dynamic crack propagation of rubber materials based on the method of simultaneous SENT- and pure-shear-mode testing. The fracture mechanic‘s approach is based on the definition of pure-shear states according to the test specimen‘s geometry ratio L0:W. We show how the tearing energy, […] mehr...

18.September 2012 - Neues aus der Forschung

Einfluss von ZnO mit unterschiedlicher Spezifischer Oberfläche auf die Vernetzung und den mechanischen Eigenschaften von rußgefüllten NR/SBR Mischungen

Effect of ZnO with Different Specific surface area on the Cure Characteristics and Mechanical Properties of Carbon Black-filled NR/SBR Compounds

Zinc oxide significantly influences the properties of rubber, both in terms of processing parameters of rubber compounds, and physical-mechanical properties. This paper presents a comparison of five types of zinc oxide with different Specific surface area. Using these types of ZnO, compounds combining NR and SBR were prepared. These compounds were vulcanized at 150 °C. […] mehr...

18.September 2012 - Neues aus der Forschung

Vorbeugung von rutschunfällen durch Kautschukbodenbeläge

Prevention of Slip Accidents by using Floor Mat

There is an increasing demand to eliminate slip and fall in bathrooms. Wet ceramic surfaces usually promote slips and occasionally lead to indoor accidents. The present work aims to test the frictional behaviour of rubber mats made of recycled rubber and filled by polyurethane of different hardness to have specific information about theirfriction coefficient and […] mehr...

18.September 2012 - Neues aus der Forschung

Untersuchung zum mechanischen Einfluss von CaCO3 in Polyethylen

The Investigation of Mechanical Behavior of CaCO³ in Polyethylenes

The aim of this study is to investigate the mechanical behavior of calcium carbonate in high-density polyethylene (HDPE) under uniaxial tension loading. The specimens are prepared to consist of 5%, 10% and 20% calcium carbonate in HDPE. The tests are conducted in two steps. Firstly, loading and unloading tensile tests are performed at E-3 1/s […] mehr...

18.September 2012 - Neues aus der Forschung

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