biostudies-literatureUnknown10(28)Park JMSelf-healing ability of materials, particularly polymers, improves their functional stabilities and lifespan. To date, the designs for self-healable polymers have relied on specific intermolecular interactions or chemistries. We report a design methodology for self-healable polymers based on glass transition. Statistical copolymer series of two monomers with different glass transition temperatures (<i>T</i>_g) were synthesized, and their self-healing tendency depends on the <i>T</i>_g of the copolymers and the constituents. Self-healing occurs more efficiently when the difference in <i>T</i>_g between two monomer units is larger, within a narrow <i>T</i>_g range of the copolymers, irrespective of their functional groups. The self-healable copolymers Science advanceseadp0729https://www.ebi.ac.uk/biostudies/studies/S-EPMC11235161biostudies-literatureGlass transition temperature as a unified parameter to design self-healable elastomers.PMC11235161Park CSSun JYPark JMKwak SKfalseGlass transition temperature as a unified parameter to design self-healable elastomers.Self-healing ability of materials, particularly polymers, improves their functional stabilities and lifespan. To date, the designs for self-healable polymers have relied on specific intermolecular interactions or chemistries. We report a design methodology for self-healable polymers based on glass transition. Statistical copolymer series of two monomers with different glass transition temperatures (<i>T</i>_g) were synthesized, and their self-healing tendency depends on the <i>T</i>_g of the copolymers and the constituents. Self-healing occurs more efficiently when the difference in <i>T</i>_g between two monomer units is larger, within a narrow <i>T</i>_g range of the copolymers, irrespective of their functional groups. The self-healable copolymers 2024-01-01T00:00:00Z2024 Jul2025-04-05T15:47:56.4Z2025-04-05T15:47:56.4ZS-EPMC112351613898586010.1126/sciadv.adp0729