Vinyl sulfonamide based thermosetting composites via thiol-Michael polymerization.
Vinyl sulfonamide based thermosetting composites via thiol-Michael polymerization.
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DOI：
10.1016/j.dental.2019.11.012
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
J. Sinha;A. Dobson;Osamah Bankhar;Maciej Podgórski;P. Shah;S. Zajdowicz;Abdulaziz Alotaibi;J. Stansbury;C. Bowman
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文献类型：
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作者：
J. Sinha;A. Dobson;Osamah Bankhar;Maciej Podgórski;P. Shah;S. Zajdowicz;Abdulaziz Alotaibi;J. Stansbury;C. Bowman
目的评估硫醇迈克尔光固化复合材料的性能的基础上，无酯的硫醇和乙烯基磺酰胺的不同单体结构和不同的填料加载量和对比的原型复合材料的性能与传统的BisGMA-TEGDMA甲基丙烯酸酯composite.MethodsSynthetic二乙烯基磺酰胺和无酯的四官能硫醇单体被用于硫醇迈克尔复合材料的发展与硫醇化的微填料的掺入。使用FTIR光谱研究聚合动力学。用流变仪评估树脂粘度。根据标准化方法评估吸水特性。通过动态力学分析，分析了热机械性能。弯曲模量/强度和弯曲韧性进行了测量，在一个通用的测试机上的三点弯曲testing model.ResultsThe乙烯基磺酰胺基硫醇迈克尔树脂配方表现出广泛的粘度与一个显着增加的官能团转化率相比，BisGMA-TEGDMA系统。研究中的两种不同类型的乙烯基磺酰胺对水的吸附表现出显着差异。叔乙烯基磺酰胺没有发生可见的溶胀，而仲乙烯基磺酰胺复合物在水中广泛溶胀。随着刚性单体的引入，聚合物基体的玻璃化转变温度升高，韧性增加。玻璃状硫醇-迈克尔复合材料获得了环境curement.SignificanceEmploying新开发的逐步增长的硫醇-迈克尔树脂在牙科复合材料将提供结构的均匀性，改善的稳定性和较低的吸水性。
ObjectiveTo assess the performance of thiol Michael photocurable composites based on ester-free thiols and vinyl sulfonamides of varying monomer structures and varied filler loadings and to contrast the properties of the prototype composites with conventional BisGMA-TEGDMA methacrylate composite.MethodsSynthetic divinyl sulfonamides and ester-free tetrafunctional thiol monomers were utilized for thiol-Michael composite development with the incorporation of thiolated microfiller. Polymerization kinetics was investigated using FTIR spectroscopy. Resin viscosities were assessed with rheometry. Water uptake properties were assessed according to standardized methods. Thermomechanical properties were analyzed by dynamic mechanical analysis. Flexural modulus/strength and flexural toughness were measured on a universal testing machine in three-point bending testing mode.ResultsThe vinyl sulfonamide-based thiol-Michael resin formulation demonstrated a wide range of viscosities with a significant increase in the functional group conversion when compared to the BisGMA-TEGDMA system. The two different types of vinyl sulfonamide under investigation demonstrated significant differences towards the water sorption. Tertiary vinyl sulfonamide did not undergo visible swelling whereas the secondary vinyl sulfonamide composite swelled extensively in water. With the introduction of rigid monomer into the polymer matrix the glass transition temperature increased and so increased the toughness. Glassy thiol-Michael composites were obtained by ambient curing.SignificanceEmploying the newly developed step-growth thiol-Michael resins in dental composites will provide structural uniformity, improved stability and lower water sorption.