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Synthesis and photopolymerization of phosphonic acid monomers for applications in compomer materials

机译:膦酸单体的合成和光聚合,用于复合材料

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Novel methacrylate monomers bearing phosphonic acid groups 1 and 2 as well as new sulfur methacrylates 9 and 10 have been prepared in good yields from thiophenol. They have been fully characterized by ~1H-NMR, ~(13)C-NMR, ~(31)P-NMR, and HRMS. Their copolymerization with a bis-GMA: TEGDMA (1 : 1) blend has been investigated with photodifferential scanning calorimetry at 50°C with camphorquinone as a photoinitiator and ethyl 4-(dimethylamino)benzoate (EDAB) as a coinitiator. The higher the content of acidic monomer 1 or 2 incorporated in the bis-GMA : TEGDMA (1 : 1) blend, the lower the mixtures reactivity. The phosphonic acid group has been proved to be responsible for this drop of reactivity.
机译:由苯硫酚以高收率制备了带有膦酸基团1和2的新型甲基丙烯酸酯单体,以及新型的甲基丙烯酸硫酯9和10。它们已经通过〜1H-NMR,〜(13)C-NMR,〜(31)P-NMR和HRMS进行了充分表征。用樟脑醌作为光引发剂和4-(二甲基氨基)苯甲酸乙酯(EDAB)作为共引发剂,在50℃下通过光差扫描量热法研究了它们与bis-GMA:TEGDMA(1:1)共混物的共聚。结合在bis-GMA:TEGDMA(1:1)混合物中的酸性单体1或2的含量越高,混合物的反应性越低。已证明膦酸基团是造成这种反应性下降的原因。

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