The utilization of undercooled or supercooled polymers presents a promising approach for the creation single-polymer composites (SPCs), applicable not only to compaction processing but also extrusion, injection molding, and 3D printing techniques. This study focuses on development characterization polyethylene naphthalate (PEN) through differential scanning calorimetry (DSC) rheological measure...

This research work introduces the Early Triassic, Late Triassic-Early Jurassic, and Early Cretaceous silica-rich sand levels at east and central Alborz, Kopeh-Dagh, and Central Iran, and compares them with the Permian silica-rich sand level in the Chirouk mine at east Iran. Ghoznavi and Gheshlaq loose sand in Alborz (Early Triassic-Early Jurassic), Soh quartzite in Central Iran (Early Triassic...

In order to be competitive in the semiconductor manufacturing industry, quality improvement and yield enhancement have received increasing attention. The research focuses on the molding process of Integrated Circuit (IC) assembly. The defects often occurred in molding process include hole, vein, crack, and floss. In order to raise the yield of molding process, the study applies the Taguchi meth...

As a renewable and biodegradable polymer, polylactide (PLA) has taken foothold in the packaging industry. However, thermomechanical barrier properties of PLA-based films need to be improved facilitate wider adoption. To address this challenge, we examined effect talc reinforcement composites based on PLA polyester. Masterbatches polymers were produced by melt compounding processed either inject...

Title of Dissertation: ALGORITHMS FOR GENERATING MULTI-STAGE MOLDING PLANS FOR ARTICULATED ASSEMBLIES Alok K. Priyadarshi, Doctor of Philosophy, 2006 Dissertation directed by: Associate Professor Satyandra K. Gupta Department of Mechanical Engineering Plastic products such as toys with articulated arms, legs, and heads are traditionally produced by first molding individual components separately...

Integral production of the thermoplastic parts with complicated geometric shapes by the processes such as injection molding and extrusion is not economical. It is better to divide the final shape into more simple parts and after production join them by an appropriate welding process. This research aims to study the tensile strength and toughness energy of high- density polyethylene parts which ...

The overall goal of this study is to propose a new approach simplify the recycling process for producing high quality material from waste beverage bottles and other sources at lower cost by using mechanical chemical reactions inside injection molding machines in one-step process. water soft drink are made PET material, while caps mainly HDPE. blends HDPE incompatible. resulted has poor properti...

The hydrostatic extrusion is a new method of extrusion process. The most important advantage of this method is reduction of friction and close tolerance for the coating thickness. In this study, the hydrostatic extrusion simulation of bimetallic wires has performed using of finite element method. In the following the advantages of hydrostatic extrusion compared to the direct extrusion are prese...