Synthesis and characterization of novel Bis-GMA derivate for resin-based dental restorative materials

摘要

2, 2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy) phenyl]propane (Bis-GMA) is a kind of most common used base resin monomer for dental restoration. Due to the hydrogen bonding between hydroxyl groups in Bis-GMA, the viscosity of the resin reaches a high level that results in a large amount of diluents are introduced into the resin system to decrease the viscosity for better application. However, a number of adverse effects are coming with the diluents such as increased curing shrinkage. Substituting hydroxyl groups which are the sources of high viscosity might be an appropriate way to reduce the amount of diluents and weaken the accompanied adverse effects. In this study, the hydroxyl groups in Bis-GMA were replaced by acetyl groups, and the viscosity was decreased from 820Pa.s to 11Pa.s significantly. Differential Scanning Calorimeter (DSC) was used for investigating the reaction kinetics of this novel monomer. The results showed that the final conversion of the modified monomer can reach nearly 85% while the corresponding value for Bis-GMA is about 75%.