Toughness Enhancement of PLA-Based Filaments for Material Extrusion 3D Printing

Table 1

The filament diameters and morphologies of all PLA/rubber filaments taken by a digital microscope at 50x magnification and by SEM at 3000x magnification.

Screw speed (rpm)	Filament (mm)	Morphologies
		Surface of filaments (50x)	Cross-section of filaments (3000x)
(a) PLA/NR
50	mm
70	mm
80	mm
90	mm
(b) PLA/TPU
60	mm
70	mm
(c) PLA/CSR
60	mm
70	mm