Assessment of extrusion-sonication process on flame retardant polypropylene by rheological characterization
作者： Guadalupe Sanchez-Olivares , , Fausto Calderas , Antonio Sanchez-Solis , Luis Medina-Torres
DOI: 10.3934/MATERSCI.2016.2.620
关键词: Polymer blend 、 Fire retardant 、 Static mixer 、 Polypropylene 、 Dispersion (chemistry) 、 Composite material 、 Extrusion 、 Intumescent 、 Materials science 、 Sonication
摘要: In this work, the rheological behavior of flame retardant polypropylene composites produced by two methods: 1) twin-screw extrusion and 2) ultrasound application combined with a static mixer die single-screw is analyzed in detail; results are related to morphology composites. The polymer composed matrix, an intumescent system functionalized clay. Scanning electron microscopy revealed that combination on-line sonication reduced particle size improved dispersion distribution additives matrix at micrometric level. From linear viscoelastic properties, Han, Cole-Cole van Gurp-Palmen diagrams characterized additives. Two well-defined behaviors were observed these diagrams. These independent on clay presence concentration. fact, device generates 3D highly interconnected structure similar co-continuous pattern blends as evidenced measurements. This improvement attributed effect allowed reducing additive content while achieving optimum classification UL94-V0.
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