Modifying surface properties of polyamide powders for selective laser sintering

International Scientific-Technical Conference on Innovative Engineering Technologies, Equipment and Materials 2018

材料科学;工业技术（总论）

Lyakhovich, A.M.^1 ; Kashapov, R.N.^1^2 ; Kashapov, N.F.^1 ; Kashapov, L.N.^1^3

Engineering Institute, Kazan Federal University, Kazan

420008, Russia^1

Laboratory of Radiation Physics, Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan

420029, Russia^2

Laboratory of Continuum Mechanics, Institute of Mechanics and Engineering, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan

420111, Russia^3

关键词: Aliphatic chains;    Oxidative degradation;    Oxygen containing groups;    Polyamide powders;    Powder surface;    Selective laser sintering(SLS);    Sintering process;    Surface layers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/570/1/012066/pdf
DOI  :  10.1088/1757-899X/570/1/012066

来源: IOP

【 摘 要 】

The purpose of this work was determination of the changes in surface properties of Polyamide-12 powder used in Selective Laser Sintering (SLS). The powders of original polyamide Duraform PAtm (3D Systems) were investigated. Also the powders remaining around the product after the sintering process were investigated. The difference in the chemical structure of the Polyamide-12 powder surface layers has been established. The reason is the increased content of oxygen-containing groups in the surface layers. To a greater extent, this difference was revealed for powders left after sintering and intended for reuse. Aliphatic chains are subject to oxidative degradation in the surface layers of the original powder. In the powder remaining after sintering, terminal carbonyl and amine groups are subject to oxidative degradation.