الفهرس 
صفحة العنوانOnly 14 pages are availabe for public view
 |  | from | 214 |  |  |
| | | from | 214 | | |
Abstract
Research Methodology:
- Experimental method. The researcher will study and analyze data as well as conducting experiments and practical applications to establish the facts of the process applied during the study.
.Abstract
In this PhD thesis, novel polymer nanocomposites are developed with the aim to increase the performances of 3D printed parts obtained by fused deposition modeling (FDM) for Packaging materials. The attention was focused on Tio2 nanomaterials incorporated into a high density polyethelen (HDPE) polymer. HDPE based nanocomposites were prepared by incorporating different amounts TiO2 1, 2 and 3 % wt. In order to understand the effect of the manufacturing process on the material’s properties, the samples were produced by filament extrusion, and fused deposition modeling (FDM). Several characterization techniques were employed in order to evaluate the flow ability, morphology, mechanical and functional properties of the materials.
In the first part of work describes the design, fabrication and operation of filaments extruder. Rod heaters were used to melt the input materials and screw was used to feed the input raw materials longitudinally along the barrel. Screw was consists of two zones namely feed, melt and transition zone.
In the second part of work, the results of the investigation on HDPE-TiO2 nanocomposites are reported. HDPE-TiO2 nanocomposites filament production by extrusion and their characterization was a preliminary step. Nanocomposite HDPE-TiO2 filaments at 1, 2 and 3 wt. % were obtained by using direct melt compounding and extrusion. The optimal TiO2 content in the filaments for FDM was found to be 3 wt. %; for this composite, a detailed investigation of the thermal, mechanical properties was performed. The presence of TiO2 in HDP
In last part of work, the advanced FDM techniques were applied to mold, design and production. Its aim is to do a comprehensive analysis on what AM is doing for the recent and future perspectives in the field of mold’s production. Furthermore, analyses were carried out on the possible use of rapid tooling for mold production.