Abstract
Sulfur-containing dynamic polymers had attracted significant attention due to their unique chemical structures with high reversibility.Utilizating sulfur,an inexpensive industrial waste product,to synthesize dynamic polysulfide polymers through reverse vulcanization has been a notable approach.However,this method required high temperatures and resulted in the release of unpleasant oders.In this study,we presented a robust method for the preparation of sulfur-rich polymers with dynamic polysulfide bonds from elemental sulfur and inexpensive epoxide monomers via a one-pot strategy at the mild room temperature.Different types of polysulfide molecules and polymers were synthesized by re-acting various epoxide compounds with sulfur,along with the investigation of their structures and dynamic behaviors.It was noteworthy that the obatined polymers prepared from m-(2,3-epoxypropoxy)-N,N-bis(2,3-epoxypropyl)aniline and elemental sulfur exhibit multiple dynamic behav-iors,including polysulfide metathesis and polysulfide-thiol exchange,enabling their rapid stress relaxation,self-healing,reprocessing and degradable properties of the cross-linked polymer.More importantly,the hydroxyl groups at the side chains from epoxide ring opening exhibit-ed potential transesterification.This work provided a facile strategy for designing dynamic sulfur-rich polymers via a mild synthesis route.
基金项目
State Key R&D Program of China(2019YFA0706801)
National Natural Science Foundation of China(52173079)
Fundamental Research Funds for the Central Universities(xtr052023001)
Fundamental Research Funds for the Central Universities(xzy022024024)
维普
万方数据