Table 2.

Mechanical properties of CNT-polymer composites reported by various researchers.

Materials	Mechanical properties	Ref.
MWCNT/ABS	Filaments containing 0.99, 1.96, 4.76, and 9.09 wt% MWCNTs were produced using a 1.7 mm nozzle. While small amounts of CNTs weakened the printed parts, a 9.09 % CNT concentration significantly increased tensile strength by 12.6 %.	[45]
MWCNT/ABS	Tensile tests were conducted with 0.5, 1, 1.5, 2, 3, and 4 wt% MWCNT. Adding MWCNTs improved the tensile strength of ABS samples, increasing from 31.43 MPa (pure ABS) to 44.57 MPa at 2.0 wt% of MWCNTs—a 41.81 % increase. However, no further improvement was observed above 3.0 wt %. The material is brittle at low MWCN and its elongation increased at higher concentrations of MWCNT (1.5 wt% and above).	[47]
MWCNT/PP MWCNT/HDPE	The experiment was made at 0 (neat polymer), 24, 39, and 47 vol% of MWCNT. Increasing MWCNT content from 0 % to 47 % in HDPE improved material strength, showing greater mechanical reinforcement in the HDPE composites as the CNT concentration rose.	[57]
MWCNT/Epoxy	Incorporating 1 and 4 wt% MWCNT into the epoxy significantly boosts mechanical properties. The Young's modulus and yield strength of the composite double with 1 wt% MWCNT and quadrable with 4 wt% MWCNT.	[69]
MWCNT/PLA	Adding 5 % MWCNT to 3D-printed PLA scaffolds and compressing it created a strong, interconnected structure. This improved Young's modulus and bending strength by 101 % and 43 %, respectively, compared to PLA with randomly distributed CNTs.	[70]
MWCNT/Epoxy	CNT/Epoxy composite was made at 0, 0.5, 1, 2, and 4 wt% MWCNT. Increasing MWCNT content from 0 % to 2 % improved the composite's performance in tension, shear, and flatwise tests.	[71]