Mixed-surface octyl/methoxyundecyl a-zirconium phosphonates (ZrPs) were investigated as distributed nanoscale fillers, in concentrations up to 50% w/w, for the purpose of increasing the elastic modulus and yield strength of polycaprolactone (PCL) without a meaningful reduction of its ductility. The volumetric nanoparticle loadings were estimated to be over 70% higher than those in nanocomposite...

Carbon, silica etc are added to natural rubber as filler to improve the mechanical properties. In the present study, a natural filler lignin was incorporated into natural rubber which was coagulated by microorganism rather than conventional method of using acid and was tested for their mechanical and wear behavior. The advantages of natural fillers are their low density, renewable character and...

Effects of nutshell fiber loadings of 30 wt.% and MCC loadings up to 15 wt.% on some properties of high-density polyethylene composites (HDPE) were investigated. The composites were manufactured by a single screw extruder and injection molding. The experimental composite samples were tested for their mechanical performance including tensile strength, tensile modulus, flexural strength, flexural...

Background: To compare the loss of preload in absence loading and after a fixed number cyclic loadings on 7-mm distal cantilever two different connection systems using all-on-four prosthetic model. Methods: Two equal models an edentulous mandible rehabilitated with technique types abutment system (MUA OT-Bridge) supporting hybrid prosthesis, were used. Initial torque values fixing screw, ten mi...

In this study, an umbrella-shaped device that is used for osteonecrosis treatment is simulated. The femoral head is subjected to various complex loadings as a result of a person's daily movements. Implant devices used in the body are made of shape memory alloy materials because of their remarkable resistance to wear and corrosion, good biocompatibility, and variable mechanical properties. Since...

During their development, plants are subjected to repeated and fluctuating wind loads, an environmental factor predicted to increase in importance by scenarios of global climatic change. Notwithstanding the importance of wind stress on plant growth and development, little is known about plant acclimation to the bending stresses imposed by repeated winds. The time-course of acclimation of young ...