THE SURFACE TREATMENT OF HYBRID FILLER

在研究硅烷处理对杂化填料的影响之前，研究了硅烷偶联剂浓度和填料热处理对复合填料（5.8 μ m）的影响。首先，用不同浓度（0.5-17%）的硅烷剂（即γ - mpts）处理光活化复合材料，考察其力学性能。复合材料的抗压强度在11%时达到最大值，直径抗拉强度在8%时达到最大值。这些浓度相当于50-70分子/100A^2。其次，研究了硅烷剂浓度（1、5、9、13%）和热处理温度（50、70、90、110、130偶氮苯甲酸）对填料性能的影响。虽然在1%的稀溶液中，热处理温度对复合材料的影响较小，但随着硅烷浓度的增加，加热超过110℃的复合材料的强度变小。在90℃的温度下，添加13%和h…More填料的复合材料强度最强。在此基础上，对杂化填料进行了宏观填料形状（不规则或球形）、微填料含量（10-40%）和混合顺序（填料在硅烷处理前后混合）三个因素的处理。硅烷浓度为填料重量的9%，热处理温度为50℃。在大填料的形貌方面，含不规则大填料的复合材料比含球形大填料的复合材料强度大。复合材料经硅烷剂处理后，复合材料的强度比混合前的复合材料高。当微填料含量为30%时，其抗压强度最大。微填料含量超过30%的复合材料抗压强度随着微填料含量的增加而降低。随着微填料含量的增加，材料的直径抗拉强度降低。少

Before investigating the effects of silane treatments of hybrid filler, the effects of concentrations of silane coupling agent and heat treatments of fillers were studied on the macrofiller (5.8mum).At first, the mechanical properties of light activated composites using fillers treated with various concentrations (0.5-17%) of silane agent, i.e., gamma-MPTS,were examined. The compressive strength of experimental composites became maximum at 11% and the maximum diametral tensile strength was obtained at 8%. These concentrations corresponded to 50-70 molecules/100A^2.In the second place, the effects of concentrations of silane agent (1,5,9,13%) and heat treatment temperatures (50,70,90,110,130ﾟC) of fillers were studied. Although the effect of heat treatment temperature was small in dilute solution (1%), the strength of composites containing fillers heated more than 110ﾟC became smaller with the increase of concentrations of silane. The composite containing the filler treated by 13% and h … More eated at 90ﾟC was the strongest.Based on these results, the hybrid fillers were treated by varying next three factors, i.e., the figure of macrofiller (irregular or spherical), the contents of the microfiller (10-40%), and the sequence of mixing (fillers were mixed before/after silane treatment). The silane concentration was fixed at 9% against the filler weight and the heat treatment temperature was also fixed at 50ﾟC.With regard to the figure of macrofiller, the composites containing the irregular macrofiller were stronger than those containing the spherical one. The composites utilizing hybrid fillers treated by silane agent after mixing the macrofiller and microfiller were stronger than those treated before mixing. The largest compressive strength was obtainedat 30% in microfiller contents. The compressive strength of composites containing the microfiller over 30% was decreased with the increase of microfiller contents. The diametral tensile strength was decreased with the increase of contents of microfiller. Less