Neues aus der Forschung

ESCANBER SYMPOSIUM

Preparation of Polypropylene/TiO2 nanocomposites using modified TiO2 nanoparticles

In this research, nanosized TiO2 powder was modified by 3-glycidoxypropyl-trymethoxysilane (GPMS) and dispersed into polypropylene (PP) matrix by melt-mixing. The Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) analyses proved the interaction of GPMS on the surface of modified TiO2 nanoparticles. The adhesion and dispersibility between the modified TiO2 nanoparticles and PP matrix were […] mehr...

21.Juni 2012 - Neues aus der Forschung

ESCANBER SYMPOSIUM

The Treatment of Natural Rubber Processing Effluent in the Context of Climate Change

A monitoring project over natural rubber processing effluent treatment systems in Vietnam raises several issues in the light of climate change. Treatment systems consume significant amounts of chemicals and energy in their operations. Methane emission from anaerobic treatment facilities is not under proper control. The emission of nitrous oxide gas from nitrification-denitrification process is also […] mehr...

21.Juni 2012 - Neues aus der Forschung

ESCANBER SYMPOSIUM

Simulation Study of the Rubber Materials using Coarse Graining Method – Adhesion between soft rubber and solid substrate

We studied the adhesion process of the soft rubber particle on a solid substrate using coarse-grained molecular dynamics simulation. The rubber particle, which was constituted by the bead spring chain with cross linker, was loaded to the solid substrate and the contact dynamics was simulated. From our simulation, the adhesion process can be analyzed using […] mehr...

21.Juni 2012 - Neues aus der Forschung

ESCANBER SYMPOSIUM

Effect of EVAgMA Compatibilizer on the Structure and Properties of Ethylene Vinyl Acetate Co- polymer / Silica Nanocomposites

In order to enhance dispersibility and interaction between nanosilica and ethylene vinyl acetate (EVA) copolymer matrix, EVAgMA (EVA grafted with maleic anhydride) was used as a compatibilizer. EVA/silica nanocomposites containing EVAgMA were prepared by solution method. The Fourier Transform Infrared (FTIR) spectra, Field Emission Scanning Electron Microscope (FESEM) images and mechanical properties of the nanocomposites […] mehr...

21.Juni 2012 - Neues aus der Forschung

ESCANBER SYMPOSIUM

Strain-included crystallization of un-vulcanized natural rubber measured by synchrotron X-ray diffraction

Strain-induced crystallization of un-vulcanized natural rubber (NR) was investigated by tensile test and synchrotron wide-angle X-ray diffraction (WAXD) measurement with respect to naturally occurring network. NR was purified by deproteinization, acetone-extraction and transesterification to remove proteins, free fatty acids and linked fatty acids, respectively, which resulted, in turn, in decomposition of the naturally occurring network. […] mehr...

20.Juni 2012 - Neues aus der Forschung

ESCANBER Symposium

Establishment of Carbon- Cycle-System with Natural Rubber

In the project the collaborative research on NR between the Nagaoka University of Technology and the Hanoi University of Science and Technology was supported. The Symposium held in Hanoi was organized by Prof. Masao Fukuda and Prof. Seichi Kawahara, from the Nagaoka University and Prof. Phan Trung Nghia from the Hanoi University. It provided an […] mehr...

20.Juni 2012 - Neues aus der Forschung

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Process simulation of rubber injection moulding: Effects of inserts on the heat flux and the article quality

The insert overmoulding is a standard practice within the rubber processing. However, the interactions between rubber part, insert, mould, heating elements and other components in the production system are complex, and their effect over the processing set up and the part quality are rarely accounted for. A poor understanding of these interactions can lead to […] mehr...

30.Mai 2012 - Neues aus der Forschung

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Aging characteristics of Carbon Black Filled vs Silica Filled Compound – Vergleich der Alterungseigen schaften von rußgefüllten und kieselsäuregefüllten Vulkanisaten

The paper presents the results of studies to assess antidegradant availability based on „partitioning“ experiments. It is shown that in a typical formulation, the amount of PPD adsorbed on the silica is quite high and hence, a large portion of the PPD is not freely available for protection. For untreated silica nearly !““% of the […] mehr...

30.Mai 2012 - Neues aus der Forschung

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Tailor-Made Carbon Blacks for Reduction of Rolling Resistance

A main issue in tyre labelling requirements is the reduction in rolling resistance. On the one hand, the reduction of rolling resistance helps to decrease CO! emissions; on the other hand, it makes it possible to save fuel costs, which is absolutely essential for transport company fleets. A tyre‘s different parts, which are produced employing […] mehr...

30.Mai 2012 - Neues aus der Forschung

Effects of Ionic Liquids on Fluorinated Rubber

Einfluss von ionischen Flüssigkeiten auf FKM

Ionische Flüssigkeiten (IF) können in Konzentrationen von bis #$ mmol in Fluorkautschuk (FKM) eingearbeitet werden, ohne dass Verträglichkeitsprobleme festgestellt werden. Mittels DSC-Messungen wurdeeine deutlich niedrigere Glasübergangstemperatur (Tg) der FKM / IF-Systeme im Vergleich zum reinen Polymer festgestellt. Im Verlauf der dargestellten Ergebnisse soll eine mögliche Erklärung für den entgegengesetzten Effekt, konstante Tg trotz IF Zusatz […] mehr...

30.Mai 2012 - Neues aus der Forschung

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Difference in the stability of network between natural rubber and polyisoprene vulcanizates

Stability of network against the mechanical stress during stretching was evaluated from the in-situ ESR measurements during stretching for vulcanized natural rubber (NR) and polyisoprene (IR). Large amounts of unpaired electrons (free radicals) were produced during stretching of vulcanized NR. However, the amounts were less in vulcanized IR. That is, the stability of network against […] mehr...

20.April 2012 - Neues aus der Forschung

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Continuous Reactive Compounding of Elastomeric Alloys based on Ground Tyre Rubber and Polypropylene in a Co-rotating Twin Screw Extruder

This paper deals with the continuous preparation of Elastomeric Alloys (EAs) with TPE-like properties by a peroxide induced reactive compounding process of ground tyre rubber and polypropylene in a co-rotating twin screw extruder. Preliminary batch-mixer experiments allowed the specification of suitable screw designs, feeding protocols and necessary residence times. The settings of screw speed and […] mehr...

20.April 2012 - Neues aus der Forschung

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Untersuchungen zum Einfluss der Prozessparameter auf die Welligkeit von geschäumten Thermoplastfolien

Im Rahmen eines Forschungsvorhabens wurde der Einfluss der Prozessparameter auf das Aufschäumverhalten von physikalisch geschäumten Thermoplasten am Beispiel von Polyethylen und Kohlendioxid untersucht. Die unterschiedlichen Aufschäumverhalten führten zu Eigenschaftsänderungen der Schaumfolien, welche sich hinsichtlich der Dichte, der Dicke und der mittleren Zellgröße äußerten. Als weitere Folieneigenschaft wurde der Fokus auf die Welligkeit gesetzt. Zur Detektion […] mehr...

20.April 2012 - Neues aus der Forschung

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Heat-Build-Up und ultimate mechanische Eigenschaften von gefüllten Elastomerwerkstoffen

Heat-Build-Up und viskoelastische Eigenschaften von gefüllten Elastomeren unter dynamisch-mechanischer Wechselbelastung wurden simultan mit einer neuen Testapparatur gemessen. Zugversuche unter verschiedenen Testbedingungen ergänzten das umfangreiche Prüfprogramm. Die Schärfe der Testbedingungen wie auch die physikalisch-chemischen Charakteristiken der inkorporierten Füllstoffe haben einen deutlichen Einfluss auf die Eigenerwärmung, das viskoelastische Verhalten und die ultimaten Eigenschaften von Gummimaterialien. Anhand von […] mehr...

20.April 2012 - Neues aus der Forschung

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Self-Healing Elastomers Using Supramolecular Approaches

Self-healing polymers are interesting because of increased lifetime or reduced failure probability. Supramolecular materials are ideally suited for such applications. In this concept physical bonds like hydrogen bonds are used to build up high molecular weight polymers or networks of lower molecular weight building blocks. The relatively weak physical bonds are reversible. Upon stress they […] mehr...

20.April 2012 - Neues aus der Forschung

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