HHS Public Access Author manuscript Author Manuscript
RSC Adv. Author manuscript; available in PMC 2017 May 25. Published in final edited form as: RSC Adv. 2016 ; 6(57): 52434–52447. doi:10.1039/C6RA09933E.
Self-Strengthening Hybrid Dental Adhesive via Visible-light Irradiation Triple Polymerization Linyong Songa, Qiang. Yea, Xueping Gea, Anil Misraa,b, Candan Tamerlera,c, and Paulette Spencera,c aUniversity
of Kansas, Bioengineering Research Center, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA.
Author Manuscript
bUniversity
of Kansas, Department of Civil Engineering, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
cUniversity
of Kansas, Department of Mechanical Engineering, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
Abstract
Author Manuscript Author Manuscript
A self-strengthening methacrylate-based dental adhesive system was developed by introducing an epoxy cyclohexyl trimethoxysilane (TS) which contains both epoxy and methoxysilyl functional groups. The experimental formulation, HEMA/BisGMA/TS (22.5/27.5/50, wt%), was polymerized by visible-light. Real-time Fourier transform infrared spectroscopy (FTIR) was used to investigate in situ the free radical polymerization of methacrylate, ring-opening cationic polymerization of epoxy, and photoacid-induced sol-gel reactions. Among the three simultaneous reactions, the reaction rate of the free radical polymerization was the highest and the hydrolysis/ condensation rate was the lowest. With 40s-irradiation, the degrees of conversion of the double bond and epoxy groups at 600 s were 73.2±1.2%, 87.9±2.4%, respectively. Hydrolysis of the methoxysilyl group was initially
RSC Adv. Author manuscript; available in PMC 2017 May 25. Published in final edited form as: RSC Adv. 2016 ; 6(57): 52434–52447. doi:10.1039/C6RA09933E.
Self-Strengthening Hybrid Dental Adhesive via Visible-light Irradiation Triple Polymerization Linyong Songa, Qiang. Yea, Xueping Gea, Anil Misraa,b, Candan Tamerlera,c, and Paulette Spencera,c aUniversity
of Kansas, Bioengineering Research Center, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA.
Author Manuscript
bUniversity
of Kansas, Department of Civil Engineering, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
cUniversity
of Kansas, Department of Mechanical Engineering, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
Abstract
Author Manuscript Author Manuscript
A self-strengthening methacrylate-based dental adhesive system was developed by introducing an epoxy cyclohexyl trimethoxysilane (TS) which contains both epoxy and methoxysilyl functional groups. The experimental formulation, HEMA/BisGMA/TS (22.5/27.5/50, wt%), was polymerized by visible-light. Real-time Fourier transform infrared spectroscopy (FTIR) was used to investigate in situ the free radical polymerization of methacrylate, ring-opening cationic polymerization of epoxy, and photoacid-induced sol-gel reactions. Among the three simultaneous reactions, the reaction rate of the free radical polymerization was the highest and the hydrolysis/ condensation rate was the lowest. With 40s-irradiation, the degrees of conversion of the double bond and epoxy groups at 600 s were 73.2±1.2%, 87.9±2.4%, respectively. Hydrolysis of the methoxysilyl group was initially
