Behavior under impact of two polyvinyl acetate-polyethylene (PVA-PE) polymers and one elastomer--application to custom-made mouthguards.
A drop tower was used to identify the mechanical behaviors of two polyvinyl acetate-polyethylene (PVA-PE) polymers and one elastomer used to fabricate custom-made mouthguards. The samples were in the form of either small cubes (edge length: 20 mm) or large cubes (edge length: 30 mm). Force and strain were recorded as functions of time, enabling a stress-strain analysis to be performed. In addition, a volume energy analysis was performed. While the three materials were viscoelastic, the stress-strain analysis showed that the PVA-PE polymers were more rigid than the elastomer, i.e., the same stress was reached with a lower strain. With the volume energy analysis, the two PVA-PE polymers were found to absorb a relatively large amount of energy with small sample deformations. Results of this study suggested that the mechanical properties of PVA-PE polymers are particularly useful and relevant for the fabrication of custom-made mouthguards.
Poisson
Philippe
P
Faculty of Dentistry, University of Victor Segalen Bordeaux 2, Bordeaux, France. philippe.poisson@u-bordeaux2.fr
Viot
Philippe
P
Petit
Julien
J
D000042:Absorption; D004548:Elasticity; D020724:Elastomers / Q000737:chemistry*; D004735:Energy Transfer; D004867:Equipment Design; D006801:Humans; D008422:Materials Testing; D009064:Mouth Protectors; D020959:Polyethylene / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013997:Time Factors; D014783:Viscosity
D020724:Elastomers; D011145:Polyvinyls; C022789:bioplast (vinyl); C013215:polyvinyl acetate; D020959:Polyethylene