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Impact fracture toughness and morphology of diatomite‐filled polypropylene composites
Author(s) -
Liang Jizhao
Publication year - 2009
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21397
Subject(s) - materials science , composite material , izod impact strength test , polypropylene , composite number , volume fraction , fracture toughness , toughening , scanning electron microscope , fracture (geology) , toughness , flexural strength , ultimate tensile strength
Impact fracture strength is an important characterization for impact toughness of materials. A polypropylene (PP) filled with diatomite with different diameter (5, 7, and 13 μm) was fabricated by means a twin‐screw extruder. The impact fracture strength of these composites was measured at room temperature to identify the effects of diatomite content and diameter on impact fracture strength of filled polypropylene composites. The results showed that the influence of diatomite on the notched impact strength was significant. When the volume fraction of the diatomite (ϕ f ) was less than 10%, the notched impact strength (σ I ) increased quickly with an addition of ϕ f , and then the variation of σ I was slight. The notched impact strength of the composite with the diatomite diameter of 7 μm is the highest when ϕ f was 10%. Furthermore, the impact fracture surface was observed by using a scanning electronic microscope (SEM) to study the toughening mechanisms. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers