THE MIXING OF FLAME RETARDANT POLYMER MATERIALS IN A NOVEL CO-ROTATING NON-TWIN SCREW EXTRUDER

摘要

The mixing process of a halogen-free intumescent flame retardant ABS composite was carried out to examine the priority of a novel co-rotating non-twin screw extruder (NTSE) over the traditional twin screw extruder (TSE). The homogeneity of the flame retardant additives of the composites processed by NTSE and TSE under the same operating condition was characterized qualitatively using mechanics performance, LOI and UL-94 tests, and quantitatively using FTIR and TG analysis. All the results suggested that NTSE could achieve better mixing of the flame retardant additives in the polymer matrix than in TSE, which was further clarified by the SEM analysis.