2.4.3. Dynamic Mechanical Analyzer

The samples were cut to 1 cm in width and 4 cm in length, and the stress–strain curve of the RCMs was measured at a lifting rate of 1 mm/min by the electronic universal testing machine (JDL-10000N, Yangzhou Tianfa test Machinery Co., Ltd., Yangzhou, China). The tensile strength of the RCMs was calculated based on the following Equation (1) [46]:

$$
\sigma\_{\rm b} = \frac{\rm P}{A\_0} = \frac{\rm P}{\rm bd} \tag{1}
$$

where σ<sup>b</sup> represents the tensile strength, P represents the maximum tensile load, A represents the cross sectional area of the sample, b represents the width and d represents thickness.

The elongation at the break of RCMs was calculated based on the following Equation (2) [46]:

$$\delta = \frac{\Delta \mathcal{L}\_{\mathsf{b}}}{\mathcal{L}\_{0}} \tag{2}$$

where δ represents the elongation at the break, ΔLb represents the increase in length at the breaking point and L0 represents the original length.
