Tensile mechanical tests on pre-CUPOMC and CUPOMC. (A and B) Tensile strength, Young’s Modulus and elongation of pre-CUPOMC-0.2-0.8-1.1-0.5, pre-CUPOMC-0.2-0.8-1.1-1.0 and pre-CUPOMC-0.2-0.8-1.1-1.5 (various HDI molar ratio: 0.5, 1.0, and 1.5); (C and D) Tensile strength, Young’s Modulus and elongation of CUPOMC-0.2-0.8-1.1-1.5 with different thermo-crosslinking time ranging from 1d to 4d. (E and F) Tensile strength, Young’s Modulus, Elongation of CUPOMC-0.2-0.8-1.1-0.5 with different UV-crosslinking time. **p<0.01, *p<0.05, #p>0.05; N=8.