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首页> 外文期刊>Journal of Applied Polymer Science >Effect of cinnamate comonomers on the dental formulation properties
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Effect of cinnamate comonomers on the dental formulation properties

机译：肉桂酸酯共聚单体对牙科制剂性能的影响

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This study reports the synthesis and characterization of two urethane dimethacrylates containing poly(ethylene oxide) or poly(propylene oxide) segment and cinnamate pendant moieties to be formulated in dental resin composites. ~1H NMR, ~(13)C NMR, and Fourier transform infrared spectroscopies, gel permeation chromatography, electrospray ionization-mass spectroscopy, and thermogravimetric measurements confirmed their structure, whereas the photopolymerization evolution of oligodimethacrylates relating to a low-molecular-weight dicinnamate methacrylate under ultraviolet irradiation was investigated by photo-differential scanning calorimeter, monitoring the degree of conversion (DC) and polymerization rate. The photopolymerization results reveal that the investigated derivatives display a good photoreactivity (DC: ～ 70%) during the formation of crosslinked polymers, the DC depending especially on the sample viscosity. The polymerization shrinkage for several mixtures including the urethane oligocinnamates (20 wt %) and diglycidyl methacrylate of bisphenol A/triethyleneglycol dimethacrylate system in the absence of filler was determined, the obtained values being in the range of 6.1-8.2 vol %. For few cured specimens incorporating quartz filler (75 wt %), water sorption/solubility, contact angle, and mechanical parameters were measured to establish if such monomers could be of interest in dentistry.
机译：这项研究报告了两种聚氨酯二甲基丙烯酸酯的合成和表征，这些聚氨酯二甲基丙烯酸酯含有聚（环氧乙烷）或聚（环氧丙烷）链段和肉桂酸酯侧基部分，拟在牙科树脂复合材料中配制。 〜1H NMR，〜（13）C NMR和傅立叶变换红外光谱，凝胶渗透色谱，电喷雾电离质谱和热重分析证实了它们的结构，而低聚二甲基丙烯酸酯的光聚合演变与低分子量甲基丙烯酸肉桂酸二甲酯有关。在紫外辐射下，通过光差扫描量热仪进行研究，监测转化率（DC）和聚合速率。光聚合结果表明，所研究的衍生物在交联聚合物的形成过程中表现出良好的光反应性（DC：〜70％），DC尤其取决于样品的粘度。测定在没有填料的情况下双酚A /三乙二醇二甲基丙烯酸酯体系的氨基甲酸酯低聚肉桂酸酯（20重量％）和甲基丙烯酸二缩水甘油酯的几种混合物的聚合收缩率，所得值在6.1-8.2体积％的范围内。对于少数掺有石英填料（75重量％）的固化样品，测量其吸水率/溶解度，接触角和机械参数，以确定此类单体是否在牙科领域中令人关注。

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