EFFECT OF SILANATION OF FILLERS ON THEIR DISPERSABILITY BY MONOMER SYSTEMS
EFFECT OF SILANATION OF FILLERS ON THEIR DISPERSABILITY BY MONOMER SYSTEMS
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DOI：
10.1111/j.1365-2842.1995.tb01562.x
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发表时间：
1995-03-01
影响因子：
2.9
通讯作者：
CRAIG, RG
中科院分区：
文献类型：
--
作者：
MOHSEN, NM;CRAIG, RG
研究了硅烷化对石英和氧化锆-二氧化硅填料通过用于配制复合材料的单体分散的影响。采用十六种硅烷偶联剂和三种方法，确定了达到湿点和流点值所需的单体量。选择具有多种有机官能和可水解基团的硅烷。硅烷化由硅烷的乙醇-水溶液进行，并通过在室温（24 ℃）和在硅烷的沸腾温度下将硅烷直接加入填料中进行。所用硅烷的量是在填料上产生最小均匀覆盖所需的量或最小覆盖的三倍。与未硅烷化的对照相比，所有硅烷和所有处理方法降低了两种填料的流动值。概括地说，硅烷化对填料颗粒分散的有效性更大：（i）当使用来自乙醇溶液的硅烷化时，与直接添加相比;（ii）当使用三倍于最小均匀覆盖率时;（iii）当硅烷含有甲氧基而不是乙氧基时;（iv）当硅烷是三烷氧基而不是二烷氧基化合物时;（iv）当硅烷是三烷氧基化合物而不是二烷氧基化合物时;（v）当硅烷是三烷氧基化合物而不是二烷氧基化合物时;（v）当硅烷是三烷氧基化合物而不是二烷氧基化合物时;（v）当硅烷是三烷氧基化合物而不是二烷氧基化合物时;（v）当硅烷是三烷氧基化合物而不是二烷氧基化合物时。（v）当有机官能团的长度和体积较小时;和（vi）当有机官能团是甲基丙烯酸酯而不是丙烯酸时。从单体系统和石英硅烷化与甲基丙烯酰氧基丙基三甲氧基硅烷，这支持使用的湿点和流动点值作为筛选测试估计填料的分散性的组合物的强度高于那些硅烷化与丙烯酰氧基丙基三甲氧基硅烷。
The effect of silanation on the dispersion of quartz and zirconia-silica fillers by monomers used to formulate composites was studied. Sixteen silane coupling agents and three methods were used, and the amounts of the monomers needed to reach wet and flow point values were determined. The silanes were selected to have a variety of organofunctional and hydrolysable groups. Silanation was done from an ethanol-water solution of the silanes and by adding the silanes directly to the filler at room temperature (24 degrees C) and at the boiling temperature of the silanes. The amount of silane used was either that required to produce minimum uniform coverage on the fillers or three times the minimum coverage. All silanes and all methods of treatment decreased the flow values for both fillers compared to the unsilanated controls. Generalizations were that the effectiveness of silanation on the dispersion of the filler particles was greater (i) when silanation from ethanol solution was used compared to direct addition; (ii) when three times the minimum uniform coverage was used; (iii) when the silane contained methoxy rather than ethoxy groups; (iv) when the silanes were trialkoxy rather than dialkoxy compounds; (v) when the length and bulkiness of the organic functional group was smaller; and (vi) when the organic functional group was methacrylate rather than acrylic. The strength of composites prepared from one of the monomer systems and quartz silanated with methacryloxypropyltrimethoxysilane was higher than those silanated with acryloxypropyltrimethoxysilane, which supports the use of the wet and flow point values as screening tests for estimating the dispersability of fillers.