title: Synthesis and characterization of N-isopropyl, N-methacryloxyethyl methacrylamide as a possible dental resin.
abstract: In this study, N-isopropyl, N-methacryloxyethyl methacrylamide (NIMM) is proposed as a possible reactive diluent in place of triethylene glycol dimethacrylate (TEGDMA) for dental resin mixtures. Real-time infrared spectroscopy was used to monitor the double-bond conversion as a function of irradiation time, and mixtures of 50/50wt% bis-GMA/NIMM were found to reach final conversions (95%) that were 1.5 times greater than bis-GMA/TEGDMA (65%) under visible light irradiation. In addition, samples cured to these conversions were tested with dynamic mechanical analysis. The bis-GMA/NIMM mixture (100% converted) was found to have a higher glass transition temperature and modulus at body temperature than a comparable bis-GMA/TEGDMA mixture (60% converted). Finally, the water sorption and solubility of bis-GMA/NIMM were determined to be higher than the bisGMA/TEGDMA comparison, but the values were still within the range of the ISO 9000s standard. These results suggest that bis-GMA/NIMM mixtures are a viable alternative to conventional dental resins since a greater degree of monomer conversion is obtainable without sacrificing physical and mechanical properties.
authors.affiliation: Department of Chemical Engineering, University of Colorado, Engineering Center, Boulder 80309-0424, USA.
authors.forename: J
authors.initials: J
authors.lastname: Nie
authors.forename: L G
authors.initials: LG
authors.lastname: Lovell
authors.forename: C N
authors.initials: CN
authors.lastname: Bowman
mesh_terms: D003764:Dental Materials / Q000138:chemical synthesis* / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D008689:Methacrylates / Q000138:chemical synthesis* / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D012116:Resins, Plant / Q000138:chemical synthesis* / Q000737:chemistry; D012995:Solubility; D017550:Spectroscopy, Fourier Transform Infrared; D014867:Water / Q000737:chemistry
chemical_list: D003764:Dental Materials; D008689:Methacrylates; C425605:N-isopropyl, N-methacryloxyethyl methacrylamide; D011108:Polymers; D012116:Resins, Plant; D014867:Water