Self-healing oligomers and the use thereof

A self-healing oligomer according to the following structure (VII):

• [UPy-(Dm-U-Dm)(2+q)]-[A(G)(n−1)-Dm]k-Z (VII);
• wherein
• UPy represents a UPy group, wherein the UPy group is a 2-ureido-4-pyrimidinone;
• U represents —NHC(O)E- or -EC(O)NH—, wherein E is O, NH, N(alkyl), or S;
• q is a number greater than or equal to 0 and less than or equal to 10;
• k is a number from 0 to 20;
• A is selected from carbon and nitrogen;
• n is 2 or 3, wherein when A is an sp3 carbon, n=3, and when A is an sp2 carbon or a nitrogen, n=2;
• m is an integer from 0 to 500;
• D is, for each occurrence of m, a divalent spacer independently chosen from —O—,
• —C(O)—, -Aryl-, —C≡C—, —N═N—, —S—, —S(O)—,
• —S(O)(O)—,
• —(CT2)i-, —N(T)-, —Si(T)2(CH2)i—, —(Si(T)2O)i—, —C(T)=C(T)-, —C(T)=N—, —C(T)=, —N═, or combinations thereof;
• wherein
• for each instance in D of a single bond, a single bond is connected thereto, and for each instance in D of a double bond, a double bond is connected thereto;
• wherein
• each T is selected for each occurrence from single valent units including hydrogen, F, Cl, Br, I, C1-C8 alkyl, C1-C8 alkoxy, substituted amino, or substituted aryl;
• wherein each T can also be selected from divalent Dm and connects to another divalent T that is also selected from Dm and form a ring structure;
• and i is an integer from 1-40;
• Z is chosen from a hydrogen, acryloyloxy, methacryloyloxy, hydroxy, amino, vinyl, alkynyl, azido, silyl, siloxy, silylhydride, thio, isocyanato, protected isocyanato, epoxy, aziridino, carboxylate, hydrogen, F, Cl, Br, I, or maleimido group;
• and
• G is, for each occurrence of n, independently selected from hydrogen, -Dm-Z, or a self-healing moiety according to the following structure (VII-b):
• (Z-Dm)jX-Dm- (VII-b);
• wherein
• X is a multi-hydrogen bonding group, a disulfide group, or a urea group;
• j=1 when X is divalent, and j=0 when X is monovalent;
• wherein the self-healing oligomer possesses at least 3 occurrences of U;
• and wherein the oligomer comprises a backbone derived from a polyether polyol, a polyester polyol, a poly(dimethylsiloxane), a disulfide polyol, or mixtures thereof.