A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 120-51-4, Name is Benzyl benzoate, molecular formula is C14H12O2. In an article, author is Yang, Yue,once mentioned of 120-51-4, Recommanded Product: Benzyl benzoate.
Highly Stretchable, Self-Healable, and Adhesive Polyurethane Elastomers Based on Boronic Ester Bonds
Integrating stretchability, self-healability, and surface adhesive properties in a single material is attractive for expanding the applications in demanding fields. Herein, we have studied the metathesis kinetics of catechol-derived boronic esters and incorporated them into polyurethane (PU) networks to prepare a type of PU elastomeric vitrimers with excellent stretchability, healability, and adhesive properties. Two series of dynamic PU elastomers that have different cross-linking densities and varied fractions of catechol moieties were simply prepared by a solution casting method from the linear PUs containing pendent catechol groups and 1,4-phenylenediboronic acid. These elastomers possess excellent stretchability and moderate mechanical properties that can be readily manipulated by varying the crosslinking density and the number of residual catechol groups. Moreover, the elastomers are healable and reprocessable under mild conditions and show moderate adhesive capability. The effects of the cross-linking density and residual catechol fraction on the thermal relaxation profiles and adhesive strength of the elastomers were explored in detail. Finally, we have demonstrated the potential of this kind of dynamic PU elastomers for applications as stretchable, healable, and self-adhesive conducting composite materials.
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