Biodegradable and Biocompatible Polymer Composite

Multistage Reversible Tg Photomodulation and Hardening of Hydrazone-Containing Polymers

“…We ascribe this result to the order-to-order transition that hydrazones induce in bulk material, allowing for stronger interactions between the polymer chains. This behavior is similar to what is observed in heat-stiffening polymer composites. − We also carried out structure property analysis to lower the initial T g value to ambient and physiologically relevant temperatures to enable their future use in 3D printing or bioimplants . Our end goal is the development of polymers that can be induced to undergo liquid-to-solid phase transitions, with properties that can be precisely controlled and dialed-in.…”

“…37−39 We also carried out structure property analysis to lower the initial T g value to ambient and physiologically relevant temperatures to enable their future use in 3D printing 40 or bioimplants. 41 Our end goal is the development of polymers that can be induced to undergo liquid-to-solid phase transitions, with properties that can be precisely controlled and dialed-in. Finally, the bistability of the hydrazone switches allowed us to lock-in different T g values for the same polymer as a function of irradiation wavelength, i.e., the Z/E isomer ratio at the photostationary state (PSS), a feat that has not been accomplished before.…”