Effect of filler content and size to properties of composite resins on microwave curing
Effect of filler content and size to properties of composite resins on microwave curing
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填料含量和尺寸对微波固化复合树脂性能的影响
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
H. Shintani
中科院分区：
文献类型：
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作者：
H. Urabe;Y. Nomura;K. Shirai;M. Yoshioka;H. Shintani
为研制微波固化复合树脂嵌体，采用力学和电镜观察等方法研究了填料含量和粒径对微波固化高纯球形二氧化硅复合树脂性能的影响。在0.45、0.96和1.46 μm的3种填料颗粒中，随着填料含量的增加，材料的抗压强度、径向抗拉强度和努氏硬度均有所增加，且在操作混合极限时达到最高值。粒径对填充树脂力学性能的影响是：在相同填料含量下，0.96 μm填充树脂的力学性能最高，1.46 μm和0.45 μm填充树脂的力学性能次之。0.96 μm的填充树脂固化后，其表面的努氏硬度基本相同，说明固化后的树脂聚合均匀，电子显微镜观察发现，固化后的树脂中存在约1.0 μm的气泡和填料与基体之间的裂纹。这是由于填料和填料表面处理材料对微波能量的过度吸收造成的。因此，需要改进填料的组成和填料的表面处理材料，这使得更难吸收微波能量。©1999©Kluwer学术出版社
The effect of filler content and size to property of composite resin using high purity spherical silica particles on microwave curing was examined by mechanical means and electron microscope observation to develop microwave-curing composite resin inlay. Increasing filler content in three kinds of filler particles (0.45, 0.96 and 1.46 μm) resulted in increasing compressive strength, diametral tensile strength and knoop hardness and indicated the highest values at the operative mixing limit. The effect of particle size was that the mechanical property of the 0.96 μm filled resin was highest, followed by 1.46 μm and 0.45 μm on the same filler content. The 0.96 μm filled resin had about the same knoop hardness on both surfaces of the cured sample, which means that uniform polymerization occurred in the cured sample.With electron microscope observation, the bubbles of about 1.0 μm and the cracks between the fillers and the matrix were observed in each cured resin. This is caused by the excessive absorption of microwave energy in fillers and surface treatment materials of fillers. Therefore, improvement of the composition of filler and surface treatment material of filler are needed, which makes it harder to absorb the microwave energy. ©©1999©Kluwer Academic Publishers