Selected properties of recycled polypropylene obtained from porous injection molded parts (in English)
Polimery 2014, No 7-8, 602
In this work the influence of blowing agents residues on the density and melt flow rate (MFR) of the polypropylene (PP) moldings was investigated. A standard methodology to determine the density of polymeric porous material was used. The amount of blowing agent residues was indicated by the melt flow rate (MFR) change of PP moldings. The aim of the research was to explore and understand the phenomena occurring during the formation of the porous structure due to the decomposition of chemical blowing agents in the injection molding process. Special attention was paid to the influence of holding pressure and plasticizing temperature as well as the molding temperature onto the intensity of PP pore creation. Specially designed test stand for porous materials cutting and grinding was used for PP moldings.