In this work, polypropylene (PP) was foamed via rotational molding using a chemical blowing agent (CBA) based on azodicarbonamide over range of concentration (0 to 0.5% wt.). The samples were then analyzed in terms morphological, thermal and mechanical properties. morphological analysis showed continuous increase the average cell size density with increasing CBA content. Increasing content also...

Healthcare whistle blowing, despite the benefits it has brought to healthcare systems in many developed countries, remains generally regarded as a pariah activity by many of the most influential healthcare professionals and regulatory institutions. Few if any medical schools or law department health law and bioethics classes, teach whistle blowing in a formal sense. Yet without exception, publi...

Abstract A visual observation experiment mimicking the pressure history in foam injection molding was utilized to infer bubbles formation core‐back operations. The different stages of bubble nucleation, dissolution, and re‐nucleation, corresponding injection, packing, opening, respectively, were studied. reduction number density re‐nucleated with respect first nucleation observed. In order unde...

Recently, to further improve the performance of aluminum foam, functionally graded (FG) aluminum foams, whose pore structure varies with their position, have been developed. In this study, three types of FG aluminum foam of aluminum alloy die casting ADC12 with combinations of two different amounts of added blowing agent titanium(II) hydride (TiH₂) powder were fabricated by a friction stir weld...

The main aim of this research is to mathematically describe the influence processing parameters metal foam production from machining chip waste. Using method, foams were produced without a remelting step, which should be both economically and environmentally effective. Firstly, expensive powders replaced with waste in form chips. Secondly, was recycled any significant material losses, usually o...

Recently, a novel fluidic actuator using steady suction and oscillatory blowing was developed for active control of high-speed turbulent flows (Arwatz et al. 2008). The suction and oscillatory blowing (SaOB) actuator converts compressed air input into pulsed bistable oscillatory blowing at the actuator outlets. The mechanism for generating bi-stable oscillatory blowing is based upon the Coandă ...