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Erosive Wear of Surfaces Coating by Epoxy / TiO2 Nanocomposite
One of the most widely used industrial coatings is epoxy surface coatings, which provides excel-lent adhesion and wear resistance when applied to metal surfaces. The erosion behavior of epoxy/ coatings by solid particles impact was investigated. The coating epoxy is equipped with dispersing TiO2 nanoparticles (NPs) directly into the epoxy resin. The erosion experiments tested using sand impact with particles sizes 150-300 µm at jet impingement angles of 30°, 60° and 90°.90°.Weiterlesen...
Wie elastische Rail Pads Gleise leiser machen
Einem Forscherteam unter Mitwirkung der Schweizer Empa ist es gelungen ein Bauteil aus elastischem Kunststoff zu entwickeln, das die Belastung für Schienenstränge mindert und die Geräuschkulisse für die Umwelt reduziert.Weiterlesen...
Spritzgießen und Additive Fertigung: Effizienz durch Synergie! Aber wie?
Das Spritzgießen ist eine wirtschaftliche Option, wenn es um die Produktion von identischen Bauteilen in großer Stückzahl geht. Demgegenüber hat sich die Additive Fertigung positioniert – nicht als Konkurrenz, sondern als ergänzende Möglichkeit zur Produktion individualisierter Modelle. So verschieden die beiden Herstellungsverfahren auch sind, so häufig gehen sie Hand in Hand. Nachfolgend ist die Optimierung des Spritzguss-Prozesses mit Hilfe additiv gefertigter Bauteile illustriert.Weiterlesen...
Novel Polyvinyl Alcohol/Barium Titanate Nanocomposites modified by Ionic Liquid
Polyvinyl alcohol (PVA)/barium titanate (BaTiO3) nanocomposites were fabrica- ted with various content of BaTiO3 be- fore and after the treatment of BaTiO3 nanoparticles with ionic liquid.Weiterlesen...
Changes in heat resistant properties of LLDPE by gamma ray pre-irradiation evaluated by weight change
The activation energy of the induction period was 136 kJ/mol which was independent on the concentration of antioxidant reagent. Gamma ray pre-irradiation of 320 kGy caused the induction period to disappear. The period when weight of the sample decreased to 99.0% by thermal aging was presupposed as an index of life time. The pre-irradiation caused a reduction of the life time of LLDPE to the half period of time.Weiterlesen...
Deformation Analysis of Cord-Rubber Compensator
Deformation and stresses in a cord-rubber compensator subjected to internal pressure were analyzed. Two finite element models were developed: shell one with composite elements and axisymmetrical one with rebar elements, within which compensator-flange contact was taken into account. The influence of geometric non-linearity and inhomogeneous orthotropy on displacements and stresses in the compensator layers was investigated. A strong nonlinearity of the structure and a significant impact of inhomogeneous orthotropy on stresses were found. The axisymmetric model enables easy contact definition and high numerical stability in the range of over-nominal internal pressure values.Weiterlesen...
Wie Polymere in der Erdumlaufbahn entwickelt werden
Das Technologische Institut für Kunststoffe, Aimplas, Valencia, Spanien, partizipiert an einem Projekt der Europäischen Weltraumorganisation (ESA) zur Entwicklung neuer Materialien unter Mikrogravitationsbedingungen in der Erdumlaufbahn.Weiterlesen...
Frictional Behavior of self lubricated biocompatible polymeric Materials
The main objective of this work is to study the effect of adding vegetables oils into high density polyethylene (HDPE) on the frictional behavior of the composite. Vegetables oils were added in 2, 4, 6, 8 and 10 wt. % content. The proposed composites are planned to be used in hip or knee joint to reduce friction and wear of HDPE free of oil.Weiterlesen...
The incorporation of AP into silica and the further reaction of Sil-AP with BG results in the introduction of organic networks composed of AP and BG on silica
Silica-filled NR compounds with high silica content were prepared using wet masterbatch (WMB) composed of NR latex and organic-networked silica (ONS). The hydrophobic ONS containing organic connecting bonds is considered very feasible for the production of ONS-NR WMB with high silica yields (>99%).Weiterlesen...
Complex media hoses made of rubber
Projectile injection technology (PIT) allows to produce hollow parts in a highly automated injection moulding process and is used successfully in thermoplastics processing [1;2]. Therefore, the projectile is forced with help of a fluid (e.g. water) into the cavity, which is filled with the moulding material and due to the mass displacement, the wall area is formed.Weiterlesen...