Thermal behaviour of side-chain supramolecular polymers designed with self-complementary quadruple hydrogen bonds

Side- chain supramolecular polymers were synthesized based on poly (ethylene-co-vinyl alcohol) and poly (butyl acrylate-co-hydroxy ethyl acrylate) functionalized with ureidopyrimidinone groups (UPy). These groups can create quadruple hydrogen bonds to each other. UPy dimers in poly (ethylene-co-vinyl alcohol)-g-UPy make crystalline stacks which start to melt at 90oC. They show thermo-reversibility in the consecutive heating and cooling cycles in the DSC experiment. In poly (butyl acrylate-co-hydroxyl ethyl acrylate)-g-UPy no stacks can be seen. Although, the transition from viscous liquid to the free standing film confirm self-assembly of UPy groups

کلیدواژه ها:

supramolecular polymer ، thermo-reversibility ، ureidopyrimidinone ، hydrogen bonds