Provided herein are polymers having the general formula I as defined herein,A-L-B Formula Ias well as crosslinked polymers having the general formula III:B′-L′-A′-A″-L″-B″ Formula IIIand methods of preparing the polymers, wherein A is a dihydroxyphenyl moiety A′-A″ is a pair of crosslinked dihydroxyphenyl moieties B, B′ and B″ are each a biopolymer and L, L′ and L″ are each a linking moiety. Further provided are crosslinked adhesives prepared from the polymers, methods of generating same by oxidizing a polymer, and uses thereof. Further provided are kits comprising an adhesive and an oxidizing agent.
