Some factors affecting inter-layer weld strength in material extrusion 3D-printed amorphous and semicrystalline polymers
Material extrusion 3D printing is an innovative polymer processing route which allows fabrication of parts with complex and customized geometries. The extent of welding occurring between the layers largely affects the mechanical response. We conducted experiments and molecular modeling on both amorphous and semicrystalline polymers. It is shown that the presence of residual alignment of the chains at the weld and a faster crystallization rate are detrimental for the weld strength.
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