Thermoplastic polyurethane (TPU) powders were successfully processed in a selective laser sintering (SLS) system. The laser-sintered polyurethane products with viscoelastic behaviors exhibit high flexibility and elongation at break at room temperature. Moreover, the creeping and the thermoresponsive shape-memory effects (SME) were also characterized. The influences of the time-temperature relevant parameters on the shape-fixity and shape-recovery ratios were investigated quantitatively. The creeping and SME were time–temperature dependent phenomena, and the shape recovery mechanism is associated to the microsegments thermal transitions within the polymer matrix.
Characterization of Creeping and Shape Memory Effect in Laser Sintered Thermoplastic Polyurethane
Contributed by the Computers and Information Division of ASME for publication in the JOURNAL OF COMPUTING AND INFORMATION SCIENCE IN ENGINEERING. Manuscript received April 2, 2016; final manuscript received June 16, 2016; published online November 7, 2016. Assoc. Editor: ChiKit Au.
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Yuan, S., Bai, J., Kai Chua, C., Zhou, K., and Wei, J. (November 7, 2016). "Characterization of Creeping and Shape Memory Effect in Laser Sintered Thermoplastic Polyurethane." ASME. J. Comput. Inf. Sci. Eng. December 2016; 16(4): 041007. https://doi.org/10.1115/1.4034032
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