Özcan C, Lestriez P, Berry-Kromer V, Thiebaud F, Sockalingum G D, Untereiner V, Angiboust J-F, Josset Y
Université de Reims Champagne-Ardenne, Département D'odontologie Conservatrice, UFR D'odontologie, Groupe de Recherche En Sciences Pour L'Ingénieur (GRESPI EA 4694), 51097, Reims, France.
Université de Reims Champagne-Ardenne, Groupe de Recherche En Sciences Pour L'Ingénieur (GRESPI EA 4694), 51097, Reims, France.
J Mech Behav Biomed Mater. 2020 Oct;110:103947. doi: 10.1016/j.jmbbm.2020.103947. Epub 2020 Jul 11.
The purpose of this study was to study the effects on Young's modulus and conversion degree of variations in polymerization conditions during the 3-point bending test of composite samples in accordance with the ISO 4049 standard.
Three nanocomposites were used in the 3-point bending test based on the conditions described in the ISO 4049 standard. Samples of 2 mm × 2 mm x 25 mm were fabricated and tested with a different number of irradiation points and irradiation time. Conversion degree of the samples were also measured by micro-Raman spectroscopy and correlated with the Young's modulus values obtained for each one.
The variations in curing protocol during specimen's realization influenced the Young's modulus and degree of conversion of all composites. These two properties correlated well. The ISO 4049 standard defines the conditions for performing the properties tests of composites to allow reproducibility and comparison of different studies. Concerning the 3-point bending test, even a minimal change in the state causes differences in the results obtained. The standard should thus clarify the tools that can be used when producing samples in order to minimize discrepancies.
The influence of the parameters surrounding the design of the samples should be controlled and defined so as not to include bias in the studies carried out. This will allow literature studies to be compared with more accuracy.
本研究旨在根据ISO 4049标准，研究在复合材料样品的三点弯曲试验中，聚合条件变化对杨氏模量和转化率的影响。
根据ISO 4049标准所述条件，在三点弯曲试验中使用了三种纳米复合材料。制备了2mm×2mm×25mm的样品，并在不同的辐照点数和辐照时间下进行测试。还通过显微拉曼光谱法测量了样品的转化率，并将其与每个样品获得的杨氏模量值相关联。
在样品制备过程中固化方案的变化影响了所有复合材料的杨氏模量和转化率。这两个性能具有良好的相关性。ISO 4049标准定义了进行复合材料性能测试的条件，以确保不同研究的可重复性和可比性。关于三点弯曲试验，即使状态有最小的变化也会导致所得结果的差异。因此，该标准应明确在生产样品时可使用的工具，以尽量减少差异。
应控制和定义围绕样品设计的参数的影响，以免在进行的研究中引入偏差。这将使文献研究能够更准确地进行比较。
