Figure 3.

The effect of the degree of methacrylation on the Young’s modulus of the cured PCLMA. (A) specifications of the tensile test piece adapted from the ASTM D638-14 ‘Standard Test Method for Tensile Properties of Plastics’ Type V specimen; (B) the Young’s modulus of cured PCLMA plotted against the degree of methacrylation of the prepolymer. Values displayed mean ± SD, N = 1, n = 4–7. (N.B. The SD in the 17%, 39% and 47% DM is too small for the error bars to be visible.) The point in red signifies a theoretical (0,0) representing a 0 MPa Young’s modulus for 0% DM PCLMA (since curing of solid structures to test under tensile loading is not possible). Cubic polynomial regression curve fitted (R² = 0.99). (C) example stress–strain curves of each of the PCLMA samples.