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dc.contributor.authorSong, Linyong
dc.contributor.authorYe, Qiang
dc.contributor.authorGe, Xueping
dc.contributor.authorMisra, Anil
dc.contributor.authorTamerler, Candan
dc.contributor.authorSpencer, Paulette
dc.identifier.citationSong, L., Ye, Q., Ge, X., Misra, A., Tamerler, C., & Spencer, P. (2016). Self-Strengthening Hybrid Dental Adhesive via Visible-light Irradiation Triple Polymerization. RSC Advances, 6(57), 52434–52447.
dc.description.abstractA 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 <5%, and increased gradually to about 50% after 48 h dark storage. Photoacids generated through the visible-light-induced reaction were effective in catalyzing both epoxy ring-opening polymerization and methoxysilyl sol-gel reaction. The mechanical properties of copolymers made with TS concentrations from 5 to 35 wt% were obtained using dynamic mechanical analysis (DMA). In wet conditions, the storage moduli at 70 °C and glass transition temperature were significantly higher than that of the control (p<0.05); these properties increased with TS concentration and storage time. The post reaction of hydrolysis/condensation of alkoxysilane could provide persistent strengthening whether in a neutral or acidic environment and these characteristics could lead to enhanced mechanical properties in the oral environment. The cumulative amount of leached species decreased significantly in the TS-containing copolymers. These results provide valuable information for the development of dental adhesives with reduced leaching of methacrylate monomers and enhanced mechanical properties under the wet, oral environment.en_US
dc.publisherRoyal Society of Chemistryen_US
dc.rightsThis article is made available under a Creative Commons Licences.en_US
dc.titleSelf-Strengthening Hybrid Dental Adhesive via Visible-light Irradiation Triple Polymerizationen_US
kusw.kuauthorSong, Linyong
kusw.kuauthorYe, Qiang
kusw.kuauthorGe, Xueping
kusw.kuauthorMisra, Anil
kusw.kuauthorTamerler, Candan
kusw.kuauthorSpencer, Paulette
kusw.kudepartmentBioengineering Research Centeren_US
kusw.kudepartmentCivil Engineeringen_US
kusw.kudepartmentMechanical Engineeringen_US
kusw.oanotesPer Sherpa Romeo on 10/13/2017: Author's Pre-print: green tick author can archive pre-print (ie pre-refereeing) Author's Post-print: green tick author can archive post-print (ie final draft post-refereeing) Publisher's Version/PDF: green tick author can archive publisher's version/PDF General Conditions: On institutional repository Publisher's version/PDF may be used Creative Commons Attribution License or Creative Commons Attribution Non-Commercial License Publisher will automatically deposit articles in PubMed Centralen_US
kusw.oaversionScholarly/refereed, publisher versionen_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US

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