ULTRASOUND AIDED EXTRUSION PROCESS FOR PREPARATION OF POLYOLEFIN-CLAY NANOCOMPOSITES

摘要

A continuous ultrasound assisted process using a single screw compounding extruder with an ultrasonic attachment was developed to prepare polyolefin/clay nanocomposites. High density polyethylene (HDPE) and isotactic polypropylene (PP) were compared. The feed rate that controls the residence time of the polymer in the ultrasonic treatment zone was varied. Die pressure and power consumption were measured. Rheological properties, morphology and mechanical properties of the untreated and ultrasonically treated nanocomposites were studied. Similarities and differences of obtained nanocomposites are discussed based on their properties and structural characteristics.