Surface modification of hyperbranch polymer with 3-mercaptopropyle trimethoxysilane: Experimental and theoretical study on the surface interaction

In the present investigation, surface modification of hyperbranch polymer by 3-mercaptopropyl trimethoxy silane (3-MPTMS) and its effect on the properties of hyperbranch polymer were studied. The mercapto groups were grafted onto hyperbranch hydroxyl groups by sol-gel process. Fourier transform infrared spectroscopy (FTIR) and thermal gravimetric analysis (TGA) have been applied to study of the interaction between hyperbranch hydroxyl groups and 3-MPTMS. The result shows that the organic functional groups are successfully grafted on hyperbranch polymer that is ended hydroxyl groups. In addition, two different PH 7 , 4.5 and 4 different times 0.5 , 2 , 8 and 24 hours were studied that the result shows acidic PH had faster hydrolysis interaction and lower condensation interaction between hyperbranch hydroxyl group and 3-MPTMS. At the end, the percentages of surface modification for acidic PH were higher than the others.

کلیدواژه ها:

Hyperbranch polymer ، 3-mercaptopropyl trimethoxy silane ، Sol-gel process ، FTIR ، TGA