(PU)Kusaneta, Kupisa Kwepamusoro, Kuzviporesa Polyurethane Elastomer: Yakagadzirwa kuburikidza neDynamic Covalent Adaptive Network Yakavakirwa paAscorbic Acid.

Vatsvagiri vakagadzira novel polyurethane elastomer yakavakirwa paascorbic acid-yakatorwa dynamic covalent adaptive network (A-CCANs). Nekusimudzira iyo synergistic mhedzisiro yeketo-enol tautomerism uye dynamic carbamate bond, zvinhu zvinowana zvakatanhamara zvivakwa: tembiricha yekuora yekupisa ye345 ° C, kutsemuka kwekupwanya kwe0.88 GPa, kusimba kwesimba re268.3 MPa (simba rekunyura kwe68m³), uye absorption ye68. 0.02 mushure me20,000 kutenderera. Inoratidzawo kuzvirapa mukati memasekondi uye kugona kudzokorodza kusvika ku90%, ichipa mhinduro yekubudirira yezvishandiso mumidziyo yakangwara uye zvimiro zvechimiro.

Ichi chidzidzo chinokatyamadza chakavaka dynamic covalent adaptive network (A-CCANs) vachishandisa ascorbic acid seyakanyanya kuvaka. Kuburikidza nekunyatso gadzirwa keto-enol tautomerism uye ine simba carbamate bond, inoshamisa polyurethane elastomer yakagadzirwa. Nyaya yacho inoratidza polytetrafluoroethylene (PTFE) -kufanana nekupisa kwekushisa-ine kupisa kwekushisa kwekushisa kusvika ku345 ° C-apo ichiratidza kuenzana kwakakwana kwekusimba uye kushanduka-shanduka: chokwadi chekuputsika kunetseka kwe0.88 GPa, uye kukwanisa kuchengetedza kushushikana kwe268.3 MPa pasi pe 99. MJ·m⁻³ yesimba. Zvinotonyanya kushamisa, izvo zvinoratidzira zvakasara strain isingasviki 0.02% mushure me 20,000 mechanical cycles, kuzvirapa mukati mesekondi imwe, uye inowana kudzokorodza kushanda kwe90%. Iri zano rekugadzira, iro rinozadzisa tsumo yekuti "kuva nehove uye makumbo ebheya," inopa mhinduro yeshanduko yezvishandiso zvakaita sezvipfeko zvakangwara uye zvemuchadenga cushioning zvinhu, uko simba remuchina uye kusimba kwezvakatipoteredza kwakakosha.