In our previous communication (Macromolecules 2010, 43, 1191-1194), we reported the generation ot dynamic covalent cross-linked polymer gels with reversible sol-gel transition and self-healing properties by condensation of acylhydrazines at the chain ends of poly(ethylene oxide) (Aa) and aldehyde groups in tris[(4-formylphenoxy)methy]ethane (B3).