Effect of porosity and environment on the mechanical behavior of acrylic bone cement modified with acrylonitrile-butadiene-styrene particles: I. Fracture toughness.
The elastomeric copolymer acrylonitrile-butadiene-styrene (ABS) was added to a conventional acrylic bone cement matrix. The results obtained show that although strength and stiffness decreased with an increasing second phase volume fraction, ductility and toughness both increased. The crack propagation became stable for specimens containing over a 5% volume fraction of the second phase. The fracture toughness increased up to 60% when the amount of ABS reached 20% (v/v). For larger amounts linear elastic fracture mechanics techniques could not be used properly. The effects of porosity and environmental conditions on the mechanical behavior were also studied. The mechanisms that control the fracture process were investigated by means of scanning electron microscopy.
Vila
M M
MM
Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya, Barcelona, Spain.
Ginebra
M P
MP
Gil
F J
FJ
Planell
J A
JA
D000180:Acrylic Resins / Q000737:chemistry*; D001843:Bone Cements; D018786:Bone Substitutes; D002070:Butadienes / Q000737:chemistry*; D004777:Environment; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D016062:Porosity
D000180:Acrylic Resins; D001843:Bone Cements; D018786:Bone Substitutes; D002070:Butadienes; D011137:Polystyrenes; C024636:ABS resin; D019904:Polymethyl Methacrylate