Synthesis of diacrylate containing biphenyl structure and its application in dental restoration
In the research field of dental restoration materials,the organic monomer triethylene glycol dimethac-rylate(TEGDMA)is widely used,which significantly improves the processing and molding properties of materials.However,materials prepared with TEGDMA generally face the problems of insufficient strength and high polymerization shrinkage.This study synthesized a biphenyl-structured diacrylate monomer(GTMBP)using 3,3',5,5'-tetramethyl-biphenyl-4,4'-diol(TMBP)as the raw material through etherification and esterification reactions.Under the premise of selecting an optimal material formula,the diluted monomer TEGDMA of traditional dental re-storative materials was partially replaced by GTMBP and studied its effects on the properties of dental restorative ma-terials using a rotational rheometer,infrared spectrometer,and universal testing machine.The results show that GT-MBP molecule containing diacrylate group and biphenyl structure was successfully synthesized and exhibited low shear viscosity(0.29 Pa·s)and high refractive index(1.54).Compared with TEGDMA system at the same content ratio,the dental restorative material system constructed with GTMBP as the organic monomer can not only maintain good mechanical properties(flexural strength of 125.27 MPa),but also achieve a lower polymerization shrinkage rate(2.23％).The research of this kind of organic monomer is expected to provide theoretical references for the industri-alization research and development of new high-strength and low-shrinkage dental composites.
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