Measuring

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Unbenannt

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

Unbenannt

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

Wiss_2

Hansen-Löslichkeitsparameteransatz

Effect of Solvents on the Solution Electrospinning of Poly(styrene-co-acrylonitrile)

Non-woven nanostructured webs of poly(styrene-co-acrylonitrile) (SAN) were produced by electrospinning, which are promising in advanced filtration. more...

August 5. 2017 - Research Result

Wiss_3

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

Wiss_1

Synchrotron time-resolved wide-angle X-ray diffraction

Comparative Study on Strain- Induced Crystallization Behaviours of Sulphur cross-linked Guayule Natural Rubber and Synthetic Isoprene Rubber

Strain-induced crystallization (SIC) behaviours of sulphur cross-linked guayule natural rubber (S-GR) and synthetic isoprene rubber (S-IR) were investigated using quick in situ simultaneous synchrotron time-resolved wide-angle X-ray diffraction/tensile measurement at SPring-8. more...

August 4. 2017 - Research news

Wiss_2

Hansen’s solubility parameter approach

Effect of Solvents on the Solution Electrospinning of Poly(styrene-co-acrylonitrile)

Non-woven nanostructured webs of poly(styrene-co-acrylonitrile) (SAN) were produced by electrospinning, which are promising in advanced filtration. more...

August 4. 2017 - Research news

Sae-oui_

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

Gomaa_Aly

PALS

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

Unbenannt

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

Ali W Y_2

Elektrostatic Charge between Rubber surfaces

Electrostatic Charge generated from Sliding of Rubber Sole against recycled Rubber Tiles

The present work investigates the effect of hardness and thickness on the electrostatic charge generated from the sliding of the rubber sole against recycled rubber tiles. Based on the experimental observations, it was found that at dry, water wet, detergent wet, oil lubricated and sand contaminated sliding, voltage decreased with increasing the hardness. Voltage generated […] more...

March 6. 2017 - Research news

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 - Article

Inga Homeier_Ulrich Giese_

Thermal oxidative ageing

Aging Processes of crosslinked Polydienes and Measures – Mechanisms and quantitative Characterization

Thermal oxidative aging is limiting the life time of rubber products. Beside environmental factors the microstructure of used polymers, the crosslinking, fillers and additives are influencing components, especially several antioxidants, where their efficiency is of high interest. From the measurements using NMR-relaxation, CL and physical testing, it is to conclude, that the concentration of the […] more...

February 9. 2017 - Research news

Analysis

Fully automated Rubber Rheometers

Alpha Technologies will be showcasing Premier TM its latest rubber rheometer product line-up to ensure reliable rubber testing. The range includes, Premier TM HC, a fully automated high capacity module, Premier TM MDR, specifically designed for the tire industry and Premier TM MV, a variable speed Mooney with rotor presence detection, a multi-zone stress relaxation data analysis and 45% reduction in die cooling time. more...

February 8. 2017 - Product Review

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

Analyis

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

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