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Conversion in Visible Light-cured Resins II : Conversion and Monomer Composition in Binary System Resins

DOI 10 Citations
  • HIROSE Hideharu
    Department of Dental Materials, Nihon University School of Dentistry
  • KIKUCHI Hisaji
    Department of Dental Materials, Nihon University School of Dentistry
  • TOMOKIYO Naoshi
    Department of Dental Materials, Nihon University School of Dentistry
  • TAKANO Mamoru
    Department of Dental Materials, Nihon University School of Dentistry
  • YOSHIHASHI Kazue
    Department of Dental Materials, Nihon University School of Dentistry
  • ANZAI Misaki
    Department of Dental Materials, Nihon University School of Dentistry
  • NISHIYAMA Minoru
    Department of Dental Materials, Nihon University School of Dentistry

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Other Title
  • 可視光線重合型レジンの重合率に関する基礎的研究II : モノマーの種類および組成と重合率との関係

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Abstract

The quantity of the remaining double bonds(RDB)in polymerized three binary system visible light-cured resins have been measured.As monomers, the synthesized cyclophosphazene monomer P_4N_4(CF_3CH_2O)_2[CH_2=C(CH_3)COOCH_2CH_2O]_6[4PN-(TF)_2-(EMA)_6], and commercial UDMA, Tri-EDMA and BMPEPP were prepared for the visible light-cured resins by changing the mixing ratio of 4PN-(TF)_2-(EMA)_6 and commercial monomers, from 20 to 80wt% and 80 to 20wt%.Trial resins were investigated by means of a fourier transform infrared spectrophotometer by the liquid film method.The infrared absorbance measurements were made before irradiation and chronologically repeated after the resins had been polymerized by irradiation for 90sec.The quantity of RDB of all trial resins decreased linearly with the logarithmic time after the start of irradiation.The quantity of the binary system resins decreased monotonously with the increase of the mixed amount of commercial monomers.Mixture of UDMA or BMPEPP with 4PN-(TF)_2-(EMA)_6, increased viscosity and decreased the quantity of RDB.

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