Block copolymers consisting of readily degradable polyperoxides and non-degradable vinyl polymers as the block segments were successfully synthesized by reversible chain transfer catalyzed polymerization, which is one of living radical polymerization techniques. The block copolymers showed characteristic morphology and wettability being different from the polymer blends. When block copolymers containing polyperoxide and polymethacrylate blocks were heated below 150 °C, the polyperoxide blocks were completely degraded and the polymethacrylate blocks were recovered without degradation. Block copolymers containing a poly(2-ethylhexyl methacrylate) block were then investigated as a dismantlable adhesion material, which requires adequate bonding strength during use and easy debonding on demand. Among the several block copolymers, the one consisting of poly(2-ethylhexyl methacrylate) and polyperoxide from methyl sorbate (PPMS) (M(n) = 4900) exhibited good performance as a pressure-sensitive adhesive (PSA). After heating the test specimens in a temperature range from 60 to 100 °C, PSA performance, which was evaluated by 180° peel strength and shear holding power measurements, was significantly diminished. Especially, after heating at 100 °C for 1 h, spontaneous debonding of some test specimens was observed because of the evolution of volatile acetaldehyde from PPMS.

Oxidative dehydrogenation (ODH) of n‐butene with V−Mg complex oxide catalysts was carried out with a fixed‐bed flow reactor at 480 °C. In order to improve the catalytic performance of V−Mg complex oxide, we examined the effect of added metal oxide on the ODH of n‐butene. When Fe was added to the V−Mg complex oxide, the reactivity of lattice oxygen in the V−Mg complex oxide increased. V−Mg‐Fe(20:30:10) prepared at a molar ratio of V:Mg:Fe=20:30:10 showed high conversion (53.9%) and buta‐1,3‐diene (BD) yield (20.3%) in the ODH with the lattice oxygen. To continuously produce BD, ODH under O2 flow was also investigated. The V−Mg‐Fe(20:30:10) catalyst exhibited higher BD yield than the V−Mg catalyst, and it was indicated that the high reactivity of the lattice oxygen affected the ODH under O2 flow. Moreover, the V−Mg‐Fe(20:30:10)‐800 catalyst calcined at 800 °C showed highly stable ODH activity, and the BD yield (11%) was maintained for 420 min. XRD analysis results of the catalyst showed that the maintenance of the ODH activity could be attributed to the maintenance of the crystalline structure of V−Mg‐Fe(20:30:10)‐800 during the reaction.