Vibration-assisted melt compounding of polypropylene/carbon black composites: Processability, filler dispersion and mechanical properties

Abstract

Composites of polypropylene and carbon black were melt compounded by a vibration-assisted process. For comparison, conventional extrusion was also used for preparation of the same composites. A throughput of the vibration-assisted process was established to be higher than that of conventional extrusion. Microscopic images of the extrudates demonstrated better dispersion of the fillers when the vibration force field was applied. The mechanical properties and viscoelastic behavior of the composites were studied and the results were discussed in the context of the reinforcing action of the fillers and the higher level of polypropylene chain scission accompanying the vibration-assisted process.

Preparation and Thermal Properties of Polypropylene Foils Filled with Talc or Boron Nitride Microparticles

“…Composites, based on polymer foils containing dispersed ceramic particles are promising materials with desired thermal properties depending on filler amount and microstructure [1][2][3][4][5][6][7][8]. Despite of the large number of investigations and physical models, giving the dependence of thermal properties on filler amount, some aspects of the preparation -properties relationship of such composites remain unexplained.…”

Experimental Study of the Extrusion Characteristic of a Vane Extruder Based on Extensional Flow

“…[16][17][18] Results show that the effects of process settings, materials, and machine structure have great influence on pressure development, and the stable pressure is highly important to the maintenance of the process stability. However, the melt viscosity reduced 19,20 the mixing performance and mechanical properties 21,22 and improved with the introduction of regular vibration forces during extrusion. Recent research results have shown that vane extruder (VE) composed of several vane plasticizing conveying units 23 is based on the positive displacement conveying mechanism dominated by extensional deformation, which has many advantages such as stable output, better dispersive, and distributive mixing, reduced melt temperature, wide adaptability.…”

Molecular Dynamics Simulation of Chain Folding for Polyethylene Subjected to Vibration Excitation

“…New and even more powerful capabilities are rapidly becoming available. Recently, the excitation technique has been applied in polymer processing and has gained more and more interest [2][3][4][5][6][7][8][9][10][11]. The types of external excitation include sonic, ultrasonic, electromagnetic, radiation and mechanical vibration depending on their origins.…”