Peng, Wenjun published the artcileAutonomous Off-Equilibrium Morphing Pathways of a Supramolecular Shape-Memory Polymer, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is thiol ene crosslinking ureidopyrimidinone network supramol shape memory polymer; 4D printing; shape-memory polymers; supramolecular bonds; time-temperature indicators; ureidopyrimidinone.
The diverse morphing behaviors of living creatures arise from their unlimited pathways. But the equilibrium-driven morphing pathways of common synthetic shape-shifting materials are very limited. For a shape-memory polymer (SMP), its recovery from the temporary shape(s) to the permanent shape typically requires external stimulation and follows a single fixed route. Herein, a covalently crosslinked SMP is designed with ample ureidopyrimidinone (UPy) supramol. moieties in the network. The UPy units endow the SMP with strong time-temperature dependency, which is explored as a mechanism for spatio-temporal programming of autonomous shape-shifting pathways. In particular, the use of digitally controlled photothermal heating provides versatility in control via an off-equilibrium mechanism. Cooling/heating across its glass transition introduces a locking/unlocking mechanism for its temporal morphing. The benefits of these unique features are demonstrated by multi-shape-transformation, an invisible-color-based clock, a time-temperature indicator, and sequence-programmable 4-dimensional printing.
Advanced Materials (Weinheim, Germany) published new progress about Crosslinking. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate).
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts