Research News


Absorbtion of of Mg and Pb

PH-sensitive Absorbent: Anionic Polyacryamide/Cassava Starch Hydrogels containing Natural Rubber for Lead and Magnesium removal from aqueous Solution

The novel absorbent from polyacrylamide (PAM), cassava starch and natural rubber (NR) by microwave assistance were produced to remove lead ion and magnesium ion in aqueous solution. The absorption of Mg2+ and Pb2+ of the novel absorbent increases as function of sample weight due to high site group or carboxylic group of absorbent. The highest […] more...

December 4. 2017 - Research news


Simulation of Tearing Energy

Prediction of Energy Release Rate in Anti-Plane Shear State (Mode III) for unfilled Elastomers

The analytical energy release rate of a cracked body in anti-plane shear state is determined by means of using the solution of the boundary value problem. The analytical calculations in the non-linear fracture mechanics are based on non-linear hyperelastic material behaviour. The Ogden model is considered for the numerical calculation of the J-integral and the […] more...

December 1. 2017 - Research news

W.Y. Ali

Tribology of CNT filled Epoxy

Tribological Behavior of Epoxy Reinforced with Carbon Nanotubes and filled by Vegetables Oils

The influence of reinforcing epoxy by carbon nanotubes (CNT) and filling by different types of vegetables oils (olive, corn, sunflower, sesame, almond and paraffin oil) on the friction coefficient (µ) and wear resistance is investigated. CNTs of 0.25, 0.5, 0.75 and 1 wt. % content have been added to epoxy matrix mixed by 10 wt. […] more...

November 29. 2017 - Research news


Verschleiß von EPDM-Walzen

Influence of thermal Aging on mechanical and tribological Properties of Roller Compounds based on EPDM

Due to mechanical, thermal and chemical impacts, elastomer covered rollers used in plastic-sheets- and printing industry show strong aging and wear. Therefore, elastomer rollers need to be exchanged and newly grinded or covered quite often. This study focuses on the influence of thermal aging on mechanical and tribological properties of roller compounds based on EPDM, […] more...

November 29. 2017 - Research news


Thermogravimetry, FTIR, GC/MS, DSC

Reliable Acrylonitrile Quantification of in-Service Acrylonitrile Butadiene Elastomers – coupled Analysis Techniques vs. classic Methods

The acrylonitrile content is a key characteristic of acrylonitrile butadiene rubbers (NBR). This paper describes the quantification of acrylonitrile of in-service NBR with several established analytical methods including the nitrogen determination according to Kjeldahl, the correlation with the glass transition temperature via differential scanning calorimetry (DSC) experiments and the analysis by attenuated total reflection infrared […] more...

November 28. 2017 - Research news


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


Rice Husk Powder in Rubber

Effects of carburized Rice Husk Powders on physical Properties of Elastomer based Materials

In this study the effects of carburized rice husk (CRH) powders on the mechanical properties of SBR (SBR 1502) / waste rubber type elastomer based materials were investigated. In addition to the calcite and rubber powder fillings in the general composition of a rubber formula used in footwear production, CRH obtained by the Proliz method […] more...

October 9. 2017 - Research news



Crystallization of Natural Rubber: Its unique Feature

Crystallization of natural rubber (NR) has been uniquely complicated. This review is to disentangle the complications. Low-temperature crystallization (LTC) is a difficulty when using NR during winter in the early 19th century, overcome by vulcanization. In 1925, strain-induced crystallization (SIC) was firstly reported, but it has remained obscure for long till the advent of time-resolved […] more...

October 9. 2017 - Research news


Increased Young’s modulus

Understanding the Behavior of the Coupling Agents TESPT and SI 363 in short-cut Aramid Fibre reinforced Elastomers

In this study the coupling agents Bis-(triethoxysilylpropyl) tetrasulfide (TESPT) and mercaptopropyl-mono-ethoxypolyether-silane (Si 363) are compared to each other in a standard SBR formulation for adhesion-activated epoxy-coated short-cut aramid fibres. Comparing TESPT with Si 363 with the help of a design of experiments approach gives a better understanding of the relevant factors, in order to judge […] more...

September 11. 2017 - Research news


CO2 in Rubber

Optimisation of the Compound Quality of CO2-based Rubber Compounds

To improve the sustainability of rubber products, a new method was developed where CO2 is built into the polymer chain of rubber polymers. With this method it is possible to reduce the CO2-footprint by using a production method for rubber that needs fewer resources and by replacing a significant amount of crude oil by using […] more...

September 6. 2017 - Research news

Sarah David_


Creating a Model for Novel Developments based on solubilty Parameters

HNBR is an elastomer with excellent heat and oil resistance, outstanding mechanical properties at elevated temperatures and good low temperature flexibility. Nevertheless, there is still a demand for further reduction in Tg while maintaining excellent media resistance. These modifications are not achievable with copolymers, which implies the application of terpolymers. While for many potential termonomers, […] more...

September 4. 2017 - Research news


Stress-Strain Curves of BR, NBR and SBR

Synchrotron WAXS Studies of stretched Natural and Synthetic Rubber Networks showing an Upturn in Stress-Strain Curves*

Natural rubber (NR) displays very distinct stress-strain curve with an upturn in the stress at high elongations while most synthetic rubbers do not. This behavior has been associated with strain-induced crystallization. Here we show that three non-crystallizing weak synthetic rubbers, i.e. BR, NBR and SBR, could be reinforced in such a way that their stress-strain […] more...

September 1. 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


Interaction between the hydroxyl and siloxane groups

Epoxidized Natural Rubber/ Modified Sepiolite Composites

Sepiolite reinforced Epoxidized Natural Rubber (ENR) composites were prepared by incorporation different loadings of sepiolite. Curing characteristics and mechanical properties were improved. more...

August 4. 2017 - Research news


Dielectric properties

Structural and Physical Properties of Biowastes filled Acrylonitrile Butadiene Rubber

Es wurden Komposite aus Acrylnitrilkautschuk (NBR), Dattelsamen (DS) und getrockneten Granatapfelschalen (PP)- Puder hergestellt und der Einfluss der Dattelsamen und der Granatapfelschalen auf die Morphologie, sowie auf die mechanischen und dielektrischen Eigenschaften überprüft. more...

August 4. 2017 - Research news

Seite 1 von 1212345...10...Letzte »