Table 5 Elastic modulus and strain at break derived from representative stress–strain curves.

From: Quantitative assessment of alkali and carbon nanotube reinforcement effects on the tensile reliability of sustainable sisal fiber bio-based epoxy composites

Sample ID

Composite description

Elastic modulus, E (GPa)

Strain at break, εf (%)

S1

Untreated sisal/epoxy

4.8 ± 0.3

2.95 ± 0.12

S2

4 wt% NaOH-treated sisal/epoxy

6.2 ± 0.4

2.90 ± 0.10

S3

5 wt% NaOH-treated sisal/epoxy

6.9 ± 0.3

3.05 ± 0.11

S4

5 wt% NaOH + 0.15 wt% MWCNT

7.4 ± 0.4

1.20 ± 0.08

S5

5 wt% NaOH + 0.25 wt% MWCNT

8.1 ± 0.3

1.15 ± 0.07

S6

5 wt% NaOH + 0.35 wt% MWCNT

7.9 ± 0.5

1.50 ± 0.09

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