Abstract: The aim of this paper is to develop a new extruder control system for recycled materials which has ability to automatically maintain constant a polymer melt viscosity of mixed recycled polymers during extrusion, regardless of variations in the Melt Flow Index (MFI) of recycled mixed grade high density polyethylene (HDPE) feedstock. A closed-loop controller is developed to automatically regulate screw speed and barrel temperature profile to achieve constant viscosity and enable consistent processing of variable grade recycled HDPE materials. The experimental results of real time viscosity measurement and control using a 38mm single screw extruder with different recycled HDPEs with widely different MFIs are reported in this work.

• Publication Date: 19-Apr-2015
• DOI: 10.15224/978-1-63248-045-3-46
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Abstract: Semiconductor metal oxide nanowires (SCMONWs) are favorable materials for various quantum devices which have one dimensional interaction and huge surface-to-volume ratio. Growth of these nanowires is commonly performed using expensive techniques requiring high vacuum and high temperature conditions, which also consume some hazardous raw materials. However, the sol-gel technique employed in this study is used primarily for the fabrication of materials including metal oxides beginning from a wet chemical solution, where low temperatures and non-vacuum conditions are utilized. Indium tin oxide (ITO) is generally used as a transparent conducting oxide for solar cells and LCD, touch screens applications. In this work, indium tin oxide (ITO) nanoparticles, nanowires and thin films are prepared on glass substrates by solgel technique and used for the production of nano-crystalline dye-sensitized solar cells (nc-DSSC), which are a relatively new class of low-cost thin film solar cells. Structu

• Publication Date: 19-Apr-2015
• DOI: 10.15224/978-1-63248-045-3-81
• Views: 0
• Downloads: 0