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Part II: Application to Elastomer Couplings

Lifetime Prediction with nonlinear Damage Accumulation based on Material Stressing

The lifetime prognosis method for elastomer components through nonlinear damage accumulation of material stressing introduced in [1] is applied to elastomer couplings in this article. The hysteresis loops recorded in dynamical part tests are used to derive the development of damage progress and the damage induced material behavior. The method is calibrated by the damage […] more...

October 9. 2017 - Research news


Thermal oxidative aging

Characterization of Stress Relaxation of cured EPDM using Chemiluminescence

Stress relaxation is a limiting factor for elastomers used for seals. However, the mechanism of stress relaxation is not fully understood because of the complexity of influencing parameters like temperature, chemicals, stress etc.. From this reason a new method is developed to characterize the thermal oxidation process under deformation using chemiluminescence (CL). An increase in […] more...

August 30. 2017 - Research news


Treating of NR Latex

Effect of Protein Crosslinking by Maillard Reaction on Natural Rubber Properties

Maillard crosslinking of proteins in natural rubber (NR) was carried out by treating fresh NR latex with various amounts of the Maillard reagents, i.e., formaldehyde (HCHO) and glutaraldehyde (C5H8O2). Attenuated total reflectance infrared spectroscopy revealed the occurrence of protein crosslinking in the treated NR. The treated NR contained higher protein content leading to not only […] more...

May 5. 2017 - Research news



Free Volumes and their Distribution in SiR/EPDM Rubber Blends probed by Positron Annihilation Lifetime Technique

The nanoscale free-volume holes sizes, fractions and their size distributions in silicone rubber (SiR), ethylene propylene diene rubber (EPDM) and their blend (SiR/EPDM) are characterized by positron annihilation lifetime spectroscopy (PALS). The results show that EPDM has an estimated smaller free-volume hole size of 193.4 Å3  with a fraction 9.10 % as compared to the corresponding […] more...

May 2. 2017 - Research news

Ulrich Giese

Damping behavior

Influence of Water on Dynamic Mechanical Properties of Silica Loaded Tire Tread Vulcanizates

The damping behavior of silica-loaded vulcanizates is significantly affected by the amount of absorbed water. It results in the formation of a new tan δ peak around -5 ~ 0 °C and an increase of the loss modulus G’’, which can be taken as an indicator for the improvement of wet skid resistance. By the […] more...

April 10. 2017 - Research news


Energieübertragung zur kontinuierlichen Vulkanistation

Analysis of the Efficiency of continuous Vulcanisation Processes

As shown in lab-scale investigations on continuous vulcanisation processes show, that various forms of vulcanisation energy transfer have very different energy demands and deliver material-specific different vulcanisation results and properties. In order to enhance basic knowledge on influential factors on continuous vulcanisation processes, a research is conducted on material-specific ideal vulcanising strategies using a specially […] more...

April 10. 2017 - Research news


Predictive Maintenance-System

Network to prevent downtime

Da Walzwerke wie die der Gummiwerk Kraiburg fast durchgängig im Dreischichtbetrieb laufen, spielt die Maschinenverfügbarkeit dort eine sehr wichtige Rolle. Schließlich verzögern Ausfälle bei einer einzigen Maschine den gesamten Produktionsprozess und verursachen so am Ende extrem hohe Kosten. Ein System zur vorausschauenden Wartung unterstützt dabei, die Anlagenverfügbarkeit zu sichern bevor ein Stillstand eintritt. more...

March 30. 2017 - Tires in

Fraunhofer LBF_

High-Throughput Small Angle Light Scattering for Rapid Determination of Phase Behavior of Multicomponent Systems

Phase Behavior of Mixtures

To develop materials based on multicomponent systems, such as polymeric mixtures, the dependency of phase behavior as function of temperature has often to be known. The determination of such phase diagrams is time consuming since large numbers of mixtures of different composition have to be prepared. more...

February 9. 2017 - Tires in

The systems have been designed taking account of industrial expectations in terms of accuracy, performance, productivity and ergonomics. Picture: Metravib


Automated Tests of Compression, Tension and Shear

Metravib presents Xpander. Used in association with a Metravib DMA instrument, the system enables DMA test campaigns on a large number of specimens to be entirely automated. more...

February 6. 2017 - Product Review

Mold Cleaning

Microparticles improve Cleaning Process

Cold Jet will be showcasing its Microparticle Technology that helps tire manufacturers to more efficiently control and improve the critical mold cleaning process. more...

February 1. 2017 - Product Review

Next Generation Colour Inspection System for Extruder Lines. Source: Micro Epsilon


Inspect the Color Code Accurancy

Micro-Epsilon will be exhibiting its latest tire color inspection unit, designed to provide fully equipped color coding, color code inspection and width inspection of extruded tread. more...

January 31. 2017 - Product Review


Development of a Plastic Latex Dipping Form

Influence of Surface Roughness on Film Formation and Film Properties of Polypropylene Dipping Former

The present research aims to develop a plastic latex dipping former based on talcum-filled polypropylene. The surface roughness on the plastic former is found to play important role on wettability: the greater surface roughness gives the poorer wettability of water but greater wettability of coagulant and pre-vulcanised latex on the former surfaces. In view of […] more...

December 2. 2016 - Research news

Wirkprinzip  des eingesetzten Messsystems (Draufsicht). Prüfspitze mit Kraftsensor (Fx, Fy) bewegt sich auf Linearführung (Sy) und belastet den rotierenden Prüfkörper (ω) schlagartig.  Bildquelle: Leibniz-Institut für Polymer­forschung Dresden e.V.

Impact loading of Carbon Black filled SBR Compounds

Wear of technical Rubber Materials under cyclic impact loading Conditions

The aim of this study is focused on the experimental investigations of wear behavior caused by cyclic impact loading of carbon black filled rubber compounds comprising pristine styrene butadiene rubber (SBR) together with incorporated SBR ground rubber (rubber powder). more...

November 28. 2016 - Research news


NMR Spectroscopy of Latex

Mechanism of heterogeneous Hydrogenation of natural Rubber in Latex

Heterogeneous hydrogenation of natural rubber (NR) present in disper-soids in latex is studied by latex-state 13C-NMR spectroscopy in order to elucidate its mechanism. The hydrogenation is carried out with palladium catalyst under hydrogen gas atmosphere at 297 to 353 K for various reaction times. The conversion of hydrogenation is found to be dependent upon reaction […] more...

October 12. 2016 - Research news

Die Rechner-Box leistet  eine hohe Datensicherheit durch den verschlüsselten VPN-Tunnel. Bild: Desma

Digitale Serviceleistungen für Gummi-Spritzgieß-Anlagen

Digital services for rubber injection moulding systems

Often, the efficiency of a machine by itself is not the decisive factor in an overall system effectiveness analysis. more...

September 12. 2016 - Tires in