A Metallosupramolecular Shape‐Memory Polymer with Gradient Thermal Plasticity

Abstract

Figure 3. The metallo-shape-memory network with gradient plasticity.a)F abrication process of the gradient shape-memory sample. b) Gradient distribution of the metal ions and the corresponding stress relaxation behaviors at 100 8 8C. c) Avisual demonstration of shape-shifting versatility arising from elasticity and gradient plasticity;scale bar = 10 mm.

Optically reconfigurable shape memory metallo-polymer mediated by a carbolong complex and radically exchangeable covalent bond

“…Conventional shape memory materials are restricted by their predetermined initial shapes after processing, which cannot be reconfigured arbitrarily to adapt to various application scenarios. 16 A combination of plasticity and the shape memory property can overcome this limitation and make it possible to reset the permanent shape of the materials. In brief, a material goes through a designed plastic deformation under certain conditions and then the deformation is immobilized as a new permanent shape.…”

“…The emergence of thermadapt polymer networks, 14 achieved via dynamic covalent bond exchanges, offers an ideal solution to tackle this problem. [15][16][17][18][19] The integration of thermal plasticity allows SMPs to reconfigure the permanent shape in an almost unrestricted manner.…”

Superlyophilic Shape Memory Porous Sponge for Smart Liquid Permeation

“…The original shape of the obtained SSMS with a large thickness and pore size is the permanent shape (Figure a 1 , a 7 ). In this state, the TPI molecular chains adopt the conformation with the highest entropy and is in the thermodynamically stable state (Figure b 1 ). − Although the PU sponge is soft and proteiform, the TPI has a relatively high modulus at room temperature (about 116.84 MPa, Figure S18, Supporting Information), which can help the PU sponge to fix its shape and pore structure. When the SSMS is heated above the melt temperature ( T m ) of the TPI (Figure a 2 ), the crystalline domains in the TPI would be melted and converted into an amorphous state (Figure b 2 ).…”

Intelligent Polymers, Fibers and Applications

“…Bonding in metal retains strength retainability over covalent bonds, while dynamic reversible molecular bonds in polymers serve as a complementary switchable property, in addition to the bonds present in metals that are observed in metallopolymers. Combining the mechanical features of both metal and polymer together in the design of metallopolymer shape-memory material, a unique way to control metal ion diffusion in the linear polymer network [58] was proposed by Yang et al, as in Figure 3b. By doing so, the overall network yields a gradient plasticity.…”