Mechanical properties of PA6/PA12 blend specimens prepared by selective laser sintering |
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Authors: | GV Salmoria JL Leite LF Vieira ATN Pires CRM Roesler |
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Institution: | Laboratório CIMJECT, Departamento de Engenharia Mecânica, Universidade Federal de Santa Catarina - UFSC, 88040-900 Florianópolis, SC, Brazil |
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Abstract: | The use of polymeric blends can increase the range of structures and properties of selective laser sintering (SLS) parts. This study investigates the processing of a binary polar system using polyamide 6 (PA6) and polyamide 12 (PA12) by SLS. The mixture composition and processing conditions, and their influence on the dynamic mechanical properties of the specimens manufactured were evaluated. The maximum tan δ values suggest that PA6 and PA12 have similar visco-dissipative behavior. The PA6/PA12 blends behavior varied according to the relaxation phenomena of the pure components, proportionally to the blend composition. The creep test showed that blends with a higher amount of PA6 had greater plastic deformation and less elastic recovery. In the fatigue test the 20/80 and 50/50 blends presented good fatigue resistance under the test conditions. |
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