Characterization of PA12/PBT specimens prepared by selective laser sintering

• Published in: Optics and laser technology Vol. 98; pp. 92 - 96
• Main Authors: Salmoria, G.V., Lauth, V.R., Cardenuto, M.R., Magnago, R.F.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.01.2018; Elsevier BV
• Subjects: Carbon dioxide; Carbon dioxide lasers; Fatigue strength; Fatigue tests; Laser sintering; Materials fatigue; Modulus of rupture in bending; PA12/PBT; Polybutylene terephthalates; Polyethylene terephthalate; Polymeric specimens; Stiffness; Studies; Terephthalate; Ultimate tensile strength; Viscoelasticity; Polymeric specimens; PA12/PBT; Laser sintering
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2017.07.044

•Flexural test showed hardening effect of PBT particles in the PA12/PBT (90/10).•Fatigue tests suggest elastic characteristic for PA12/PBT (90/10) and stiffness.•The relaxation peak of PA12/PBT indicate chemical affinity between the phases. In this study the structure and properties of PA12 (Polyamide 12) and PBT (polybutylene terephthalate) blend specimens manufactured by SLS using a CO2 laser were investigated. The microstructures of PA12/PBT blend specimens were found to be dependent on the PBT content. The higher values for the flexural modulus and ultimate strength presented by 90/10 PA12/PBT specimens indicated the hardening effect of low quantities of PBT particles in the PA12 matrix, which provides higher stiffness. The visco-elastic and fatigue test results for the PA12/PBT 90/10 blend also suggest an elastic characteristic for this blend composition. The potential application in the manufacturing of blend parts with a composition of 90/10 PA12/PBT with high stiffness and fatigue resistance using SLS was verified.