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Physical‐Mechanical and Thermal Properties of Polyethylene Toughened with Submicron BaSO 4 Particles
Author(s) -
Bianchi Francesca,
Lazzeri Andrea,
Pracella Mariano,
D'Aquino Arianna,
Ligeri Giorgio
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200451420
Subject(s) - materials science , composite material , high density polyethylene , charpy impact test , ultimate tensile strength , izod impact strength test , polyethylene , filler (materials) , composite number , particle (ecology) , oceanography , geology
Abstract The mechanical and thermal behaviour and the morphology of High‐Density Polyethylene (HDPE), filled with different types of Barium Sulfate (BaSO 4 ) submicron particles have been examined. Composites with a filler content in the range 5‐15 vol% were obtained with a twin screw mixer‐single screw extruder and then analyzed by means of DSC, SEM and tensile and Charpy impact tests. The effect of different surface treatments of filler particles on the composite properties has been studied. The results indicate that the addition of BaSO 4 particles leads to slight increase in Young's modulus and to a decrease in the yield stress independently of surface treatment. The fracture resistance tests demonstrated a strong influence of filler content and surface agents on impact parameters. The use of BaSO 4 filler appears to induce a good toughening of HDPE, especially at low volume content, while surface agents reduce particle agglomeration and decrease the adhesion between filler and polymer matrix.