从图中可以看出，P-PUU支架的抗压强度和弹性模量随着P-PUUs中PP含量的增加而增强，证实了将PP引入聚合物主干有助于提高力学性能。其中P-PUU1.1的抗压强度和模量与PDLLA同样弱，P-PUU1.1的分子量最低，在所有支架中的压缩变形最差（只有30%）。与PDLLA支架相比，P-PUU1.2和PPUU1.4支架的抗压强度和模量显著提高。其中P-PUU1.4支架的抗压强度和模量最高，分别达到155.9±5.7和14.8±1.1MPa。因此，通过调节PPUUs的PP含量，以满足人松质骨的力学需求，之前报道的模量分别为5−500MPa，抗压强度为2−12MPa。

It was observed that the compressive strength and elastic modulus of P-PUU scaffolds enhanced with theincrease PP contents of P-PUUs, confifirming that the introduction of PP into polymer backbone benefifited for enhancing mechanical properties. In particular, the compressive strength and modulus of P-PUU1.1 were similarly weak with those of PDLLA, and P-PUU1.1 exhibited the worst compressive deformation (only 30% deformation to break) in all the scaffolds because of its lowest molecular weight. Compared with those of PDLLA scaffffolds, P-PUU1.2 and PPUU1.4 scaffolds demonstrated signifificantly higher compressive strength and modulus. Especially, P-PUU1.4 scaffolds demonstrated the highest compressive strength and modulus reaching 155.9 ± 5.7 and 14.8 ± 1.1 MPa, respectively. Therefore, the mechanical properties of 3D-printed P-PUU scaffffolds were moderated by regulating the PP contents of P-PUUs to meet the mechanical demands of human cancellous bone, which was previously reported with modulus in the ranges of 5−500 MPa and compressive strengths of 2−12 MPa, respectively.