Abstract:Manganese oxide (MnO 2 ) is a commonly used vulcanizing agent, which can convert polysulfide oligomers with reactive terminal mercaptans into polymeric networks. Herein, an elegant approach for the fast and facile curing behavior of polysulfide rubbers was disclosed under visible-light irradiation. Photocatalytic disulfide bond coupling of mercaptan end groups can be achieved on MnO 2 in the presence of visible-light irradiation. More importantly, compared with pristine MnO 2 , surface-reduced MnO 2 (R-MnO 2 )… Show more
“…O 2 can consume the photo-generated electrons and promote the separation of holes and electrons, thereby improving the reaction activity. 24 Thirdly, δ-MnO 2 is composed of cross-linked nanosheets and exhibits the highest specific surface area, which features more exposed reactive active sites for the curing reaction of liquid PS rubber molecules. 25 Furthermore, the hydroxyl (–OH) content on the surface of δ-MnO 2 is much higher than that of α-MnO 2 and γ-MnO 2 , and –OH plays an important role in the activation of –SH and increases the activity.…”
MnO2 was widely utilized as vulcanizing agent for polysulfide sealing, however, it was difficult to flexibly adjust vulcanizing process with low cost. Herein, we successfully prepared the α-MnO2, γ-MnO2 and...
“…O 2 can consume the photo-generated electrons and promote the separation of holes and electrons, thereby improving the reaction activity. 24 Thirdly, δ-MnO 2 is composed of cross-linked nanosheets and exhibits the highest specific surface area, which features more exposed reactive active sites for the curing reaction of liquid PS rubber molecules. 25 Furthermore, the hydroxyl (–OH) content on the surface of δ-MnO 2 is much higher than that of α-MnO 2 and γ-MnO 2 , and –OH plays an important role in the activation of –SH and increases the activity.…”
MnO2 was widely utilized as vulcanizing agent for polysulfide sealing, however, it was difficult to flexibly adjust vulcanizing process with low cost. Herein, we successfully prepared the α-MnO2, γ-MnO2 and...
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