Synthesis and Characterization of Pentaerythritol Diacrylate
Li Sun
Institute of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, China
Lin Zhu
Institute of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, China
Weilan Xue
Institute of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, China
Zuoxiang Zeng *
Institute of Chemical Engineering, East China University of Science and Technology, 200237 Shanghai, China
*Author to whom correspondence should be addressed.
Abstract
Pentaerythritol diacrylate (PEDA) is synthesized by the esterification of pentaerythritol (PER) with acrylic acid (AA) using p-toluenesulfonic acid (PTSA) supported on silica as a catalyst. Fourier transform infrared spectrometer (FT-IR), and carbon nuclear magnetic resonance spectroscopy (13C-NMR) were used to characterize the product of PEDA purified by utilizing column chromatography. The effects of various operating conditions such as the catalyst concentration (wcat), the reactants mole ratios (NAA/NPER), the reaction temperature (T) and time (t) on the yield of PEDA are investigated. The results show that the yield of PEDA increases sharply with increase in wcat until wcat is 2.0 wt% and then increases gently. The highest yield (64.5%) is obtained when the operation conditions are as follows: wcat=2.0 wt%, NAA/NPER=2.7, T=403 K and t =240 min.
Keywords: Pentaerythritol diacrylate, pentaerythritol, acrylic acid, PTSA-Silica catalyst, esterification