Polymerization reactions of 3-glycidyloxypropyltrimethoxysilane (GPTS) were carried out by different catalysts, potassium hydroxide, potassium tert-butoxide, and tetraphenylporphyrin aluminum chloride (TPPAlCl), and tetrafluorophthalate zironium isopropoxide complex. Polymer samples obtained from the ring-opening polymerization of GPTS were characterized by Fourier transform infrared spectroscopy, NMR spectroscopy, electrospray ionization mass spectroscopy, and gel permeation chromatography. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 123: 3527-3534, 2012