%0 Journal Article %A Takahashi, Akira %A Goseki, Raita %A Ito, Kohzo %A Otsuka, Hideyuki %D 2017 %T Thermally Healable and Reprocessable Bis(hindered amino)disulfide-Cross-Linked Polymethacrylate Networks %U https://acs.figshare.com/articles/journal_contribution/Thermally_Healable_and_Reprocessable_Bis_hindered_amino_disulfide-Cross-Linked_Polymethacrylate_Networks/5559073 %R 10.1021/acsmacrolett.7b00762.s001 %2 https://acs.figshare.com/ndownloader/files/9650488 %K damage healability %K BiTEMPS-cross-linked PHMA networks %K polymethacrylate networks %K on-demand malleability %K polymer chain exchanger %K hexyl methacrylate %K Thermally Healable %K low-molecular-weight BiTEMPS %K stress-relaxation measurements %K bulk %K repeatable reprocessability %K Swelling experiments %K vinyl polymer networks %K BiTEMPS exchange reactions %K BiTEMPS cross-linkers %K inducible healability %X A facile approach to polymethacrylate networks that contain thermally exchangeable bis­(2,2,6,6-tetramethylpiperidin-1-yl)­disulfide (BiTEMPS) cross-linkers is reported, and the easily inducible healability and reprocessability of the obtained networks are discussed. The free radical polymerization of BiTEMPS cross-linkers and hexyl methacrylate (HMA) monomers afforded insoluble and colorless networks of poly­(hexyl methacrylate) (PHMA) films, whose structures were characterized after de-cross-linking via thermal BiTEMPS exchange reactions with added low-molecular-weight BiTEMPS. Swelling experiments and stress-relaxation measurements at elevated temperatures revealed the contribution of BiTEMPS as a polymer chain exchanger both in the gels and in the bulk. The BiTEMPS-cross-linked PHMA networks showed damage healability and repeatable reprocessability in the bulk by simple hot pressing at 120 °C under mild pressure (∼70 kPa). These results should grant facile access to various vinyl polymer networks with on-demand malleability. %I ACS Publications