macromonomer

Polymerizable organic silane molecules 3-(trimethoxysilyl)propylmethacrylate (3MPS) and vinyltri(2-methoxyethoxy)silane (VTMES) have been introduced onto surfaces of high purity Boehmite (a commercial alumina) via hydroxyl groups on the oxides in order to obtain organic-inorganic hybrid “macromonomers”. Changes of surface characteristics have been determined using thermogravimetric analysis (TGA) and Fourier-transform infrared spectroscopy (FTIR). The influence of the type of silane used and modification conditions have been determined.

Dextran methacrylates were received by acylation of dextran with methacryloilchloride in the presence of tertiary amines in the DMF/LiCl solution. Degree of substitution (DS) of synthesized derivatives reached 1.8 methacrylic residues per glucopyranoside unit of dextran macromolecule. Dextran methacrylates, obtained in the presence of triethylamine, with DS over 0.5 were insoluble in water. Derivatives synthesized in the presence of pyridine were separated in the form of a stable water soluble complex with pyridine chloride. These complexes maintain their water solubility up to DS = 1.8.