STUDIES ON MELT-SPINNING OF POLYPROPYLENE/POLYSTYRENE BLENDS

Optimal Control of Melt Spinning Processes

An optimal control problem for a mathematical model of a melt spinning process is considered. Newtonian and non–Newtonian models are used to describe the rheology of the polymeric material, the fiber is made of. The extrusion velocity of the polymer at the spinneret as well as the velocity and temperature of the quench air serve as control variables. A constrained optimization problem is derive...

Effect of Melt Spinning Variables on the Structural Changes of Recycled and Bottle Grade Filament Yarn PET

Simulation of Multifilament Semicrystalline Polymer Fiber Melt-Spinning

The goal of this effort is to provide an accurate simulation of multifilament fiber melt spinning, applicable for a wide range of material and process conditions. For ease of use, the model should run on a standard laptop or desktop computer in reasonable time (one hour or less). Most melt spinning models simulate the formation of a single filament, with little or no attention given to multifil...

Impact, thermal and biodegradation properties of high impact polystyrene/corn starch blends processed via melt extrusion

High impact polystyrene (HIPS)/corn starch blends were prepared in presence of glycerol as a plasticizer via melt extrusion process by a twin-screw extruder. The novelty of this work is first, because of the use of pre-gelatinized corn starch as modified one and second, the procedure of making blends by extruder which makes it ease of access and also industrially possible. The blends were then ...

Melt Spinning, Functionalization and Durability of Polyetheretherketone-Based Fibres

............................................................................................................................................ i Preface .............................................................................................................................................. ii List of publications ..................................................................................