THE SURFACE TREATMENT OF HYBRID FILLER

在研究硅烷处理对杂化填料的影响之前，首先研究了硅烷偶联剂的浓度和填料的热处理对宏观填料(5.8微米)的影响。首先，考察了不同浓度(0.5-17%)的硅烷偶联剂(即γ-MPTS)处理后的复合材料的力学性能。实验复合材料的压缩强度在11%时达到最大值，径向拉伸强度在8%时达到最大值。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ﾟC)对填料性能的影响。尽管在稀溶液中(1%)热处理温度对复合材料的强度影响不大，但随着硅烷浓度的增加，加热温度超过110ﾟC的复合材料的强度变小。经13%/h…处理后的复合材料根据这些结果，通过改变大颗粒填料的形状(不规则或球形)、微颗粒填料的含量(10-40%)和混合顺序(填料在硅烷处理前/后混合)来处理杂化填料。当硅烷质量分数为9%时，热处理温度为50ﾟC。从大颗粒填料的形态来看，含不规则大颗粒填料的复合材料比含球形大颗粒填料的复合材料强度大。经硅烷处理剂处理后的混杂填料与微细填料混合后的复合材料比混炼前处理的复合材料强度更高。当微粉含量为30%时，抗压强度最大。当微粉含量超过30%时，复合材料的抗压强度随微粉含量的增加而降低。随着微粉含量的增加，复合材料的径向拉伸强度降低。较少

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