Abstract
A tannin-based epoxy acrylate resin was prepared from glycidyl ether tannin (GET) and acrylic acid. The influence of the reaction condition for producing tannin epoxy acrylate was studied by FT-MIR, 13C-NMR, MALDI-TOF spectroscopy and shear strength. The best reaction conditions for producing tannin epoxy acrylate resin without bisphenol A was by reaction between GET and acrylic acid in the presence of a catalyst and hydroquinone at 95 °C for 12 h. FT-MIR, 13C-NMR and MALDI-TOF analysis have confirmed that the resin has been prepared under these conditions. The joints bonded with this resin were tested for block shear strength. The results obtained indicated that the best strength performance was obtained by the bioepoxy-acrylate adhesive resin prepared at 95 °C for a 12-h reaction.
Highlights
Epoxy resins represent an important class of polymers primarily due to their versatility, high degree of crosslinking and ease of use
Matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry coupled with1313 C NMR was a suitable method for the analysis of the reaction products formed coupled with C NMR was a suitable method for the analysis of the reaction products formed by the by the reaction of bioepoxy tannins with acrylic acid
They have been shown to be capable of reaction of bioepoxy tannins with acrylic acid
Summary
Epoxy resins represent an important class of polymers primarily due to their versatility, high degree of crosslinking and ease of use They are very widely used in modern industry, such as for adhesives, coatings and paints, substrates for printed circuit boards and encapsulating materials for microelectronic devices [1]. They contain many hydroxyl groups, and the nature of the interchain bonds gives cured epoxies many desirable characteristics [2]. BPA-based resins are encountered in human health applications, such as filling materials or sealants in dentistry These polymers are sensitive to hydrolysis and leaching of BPA, leading to widespread human exposure as revealed by a number of studies [9,10]. High BPA levels in various human fluids and tissues have been detected, which may be responsible for health damages [11]
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