Epoxy resins have been widely used in commercial applications, and their adverse health effects have been mostly reported in occupational settings. The most frequent adverse effects are irritation or allergic mechanisms involving the dermal and respiratory systems. Sensitization is usually caused by low molecular weight or short-chain compounds. We report here two workers exposed to an epoxy re...

The aim of this paper is to investigate adhesion property between nano-layered filler and the polymer matrix using a combination of experimental and micromechanical models as well as the changes in yield strength and stiffness of a layered silicate-filled epoxy nanocomposite. The results indicate that addition of intercalated layered silicate particles increased Young’s modulus and yield streng...

The micro layers micaceous iron oxide and nano-TiO 2 were incorporated into the epoxy resin by mechanical mixing and sonication process. Optical micrographs showed that the number and diameter size of nanoparticle agglomerates were decreased by sonication. The structure and composition of the nanocomposite was determined using transmission electron microscopy which showed the presence of disper...

Transmission electron microscopic (TEM) observation of human chromosome ultrastructure may provide useful information on various abnormalities. Due to the difficulties in detaching metaphase chromosome spreads from the glass slide, this approach has been restricted. We introduce a simplified protocol in which the metaphase chromosome spreads are made on a flexible thermoplastic membrane (Aclar ...

A thermodynamic study of the adsorption of an epoxy acrylate resin used for UV-cured coatings on two different anti corrosion pretreatments on aluminium alloys relevant to aerospace industry has been undertaken. Aluminium alloy Al2219 specimens, treated with an inorganic chromate based conversion coating (Alodine 1200S) and an organic titanium based conversion coating (Nabutan STI/310), were im...

External bonding of carbon fiber sheets has become a popular technique for strengthening concrete structures all over the world. Epoxy adhesive, which is used to bond the carbon fiber sheets and concrete, deteriorates rapidly when being exposed to high temperatures. This paper presents a high-temperature-resistant modified magnesia-phosphate cement (MPC) with the compressive strength that does ...

Two component, waterbased epoxy coatings can be classified by the type of epoxy resin employed. Low molecular weight, liquid epoxy systems are commonly referred to as Type I, whereas systems based on higher molecular weight, solid epoxy dispersions are referred to as Type II. This paper will focus on coatings based on both types of resins. In the first case, novel curing agent technology for us...

The performances of outdoor polymeric insulators are influenced by environmental conditions. The use of polymeric materials in a particular composition can be produced insulators that are resistant to environmental influences. This paper presents the effect of artificial tropical climate on the hydrophobicity, equivalent salt deposit density (ESDD), surface leakage current, flashover voltage, a...

For the several decade years, organic light-emitting diodes (OLEDs) have been intensively studied because of their potential applicability to large-size flat panel displays, and more recently also solid-state lighting [1-4]. However, the lifetimes of the organic electronic devices are one of the most matters for the practical use of such devices, because of the ambient moisture and oxygen immed...