Functionalization of poly(organophosphazenes), 10(a) - Thermally induced grafting reactions of maleates containing oxazoline groups onto aryloxy-substituted poly(organophosphazenes)

摘要

The functionalization reaction of aryloxy-substituted poly(organophosphazenes) with variable amounts of oxazoline groups is described as a function of different experimental parameters, such as the reaction time and temperature, the concentration of the peroxide initiator and of the oxazoline-containing maleate group, the solvent used to run the process and the type of substituents attached to the polyphosphazene skeleton. The resulting phosphazene grafted copolymers were characterized by IR and NMR (H-1,C-13 and P-31) spectroscopy and by thin layer chromatography. These materials are successively reacted with poly(methacrylic acid) due to the well known reactivity of the oxazoline residues with carboxylic functions, to form new materials in which the inorganic and the organic macromolecules are linked together through genuine covalent bonds formed by ester-amide structures. [References: 57]