Fig. (4) Mechanical properties, aggregate/cluster formation and biodegradability of SP nanocomposites with different nHA content: A)Tensile modulus of SP nanocomposites with different nHA content; B) Tensile strength of SP nanocomposites with different nHA content; C) Top new aggregate/cluster formation between PCL(UPy)2 and HApUPynano-particles in supramolecular nano-composites; bottom temperature stability of the supramolecularly assembled aggregates/ clusters; D) biodegradability evaluation in terms of hardness and moduli data of the 60/120 days incubated samples in comparison with fresh samples (a and b), the MTT viability test on PBS solutions equilibrated with the neat PCL(UPy)2, PU10 and PH10 and pure PBS solution (c). Fresh PBS solution and culture medium were used as controls. The viability of rBMSCs in culture medium (DMEM) was set at 100% [72].