Development of polymeric materials capable of self‐healing at low temperatures is an important issue since their mechanical strength and self‐healing performance are often in conflict with each other. Herein, random copolymers with self‐healing capability in a wide temperature range prepared from 2‐(dimethylamino)ethyl methacrylate (DMAEMA), glyceryl monomethacrylate (GlyMA), and butyl methacrylate monomers via free‐radical polymerization and subsequent cross‐linking with hexamethylene diisocyanate are reported. Wound closure is facilitated by swelling below the lower critical solution temperature or by heating above the glass transition temperature (T g) of the polymer. GlyMA units form metal–ligand coordination complexes with dibutyltin dilaurate, leading to the formation of new carbonate bonds under ambient CO2 and H2O conditions. Although swelling/heating reduces the polymer's mechanical strength, it is fully restored following chemical re‐bonding/drying at room temperature. The swelling and degree of scratch healing are affected by pH, temperature, and the DMAEMA content.

The recovery of synthetic water-soluble polymers is of high environmental and economic importance. We report that these polymers are completely recovered using thermoresponsive polymer-brushed superparamagnetic nanoparticles. Thermoresponsive poly(N-isopropylacrylamide-ran-N,N-dimethylacrylamide) (RCP) and poly(N-isopropylacrylamide-ran-N,Ndimethylacrylamide)-block-poly(acrylic acid) (BCP) were used as the watersoluble polymer to be recovered and as the corona layer of iron oxide nanoparticles (IONPs), respectively. Both IONPs-BCP and RCP were simply collected by a magnet after heating, and the IONP-BCP/RCP mixture allowed for good kinetic inhibition of methane hydrate formation. This work reveals that the synergistic behavior of IONPs as recovery agents is practically utilized for the recovery of synthetic water-soluble polymers.

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Poly(lactic acid)-based porous polymer with an interconnected pore structure and superior pore morphology was successfully fabricated by one-step digital light processing (DLP) 3D printing. To provide biodegradation property and UVreactivity, a photocurable resin was synthesized by ring-opening polymerization of lactide and glycidyl methacrylate (GMA). The resin was fabricated by an emulsion templating method called high internal phase emulsion (HIPE) for introducing pore structure in 3D printing. The final product ended up exhibiting biodegradable characteristics and had lactic acid components. The enzymatic degradation tests verified the influence of the biodegradable moiety and confirmed that erosion tendency is impacted by pore structure.

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