Filler-Elastomer Interactions. Part I: Silica Surface Energies and Interactions with Model Compounds
Filler-Elastomer Interactions. Part I: Silica Surface Energies and Interactions with Model Compounds
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DOI：
10.5254/1.3538573
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发表时间：
1991-09
影响因子：
1.5
通讯作者：
Meng-jiao Wang;S. Wolff;J. Donnet
中科院分区：
文献类型：
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作者：
Meng-jiao Wang;S. Wolff;J. Donnet
摘要反相气固色谱在无限稀释度下工作，已被用来评估二氧化硅的表面能，包括气相和沉淀的表面能。由正构烷烃吸附得到的-CH2-基团对应的吸附自由能计算了二氧化硅表面自由能的色散组分。基于探针分子覆盖的表面积，通过比较极性探针和正构烷烃的吸附自由能，分别评估了表面能的特定成分。结果表明，气相二氧化硅的表面能色散组分稍高，而沉淀二氧化硅的比能组分高得多，这可能是由于其表面硅醇浓度较高所致。此外，还从低分子量类似物的吸附用层析法估算了橡胶基质与二氧化硅之间的相互作用。
Abstract Inverse gas-solid chromatography, operated at infinite dilution, has been used to assess the surface energies of silicas, both fumed and precipitated. The dispersive components of the surface free energies of the silicas were calculated from the free energies of adsorption, corresponding to the —CH2— group, obtained from n-alkane adsorption. The specific components of the surface energies were evaluated separately by comparison of the free energies of adsorption of polar probes with those of n-alkanes, based on the surface areas covered by the probe molecules. The results indicate that while the dispersive components of silica surface energies is somewhat higher for the fumed silicas, the specific components are much higher for precipitated silicas, probably resulting from the higher silanol concentration on their surfaces. Moreover, the interaction able to take place between rubber matrix and the silicas are also estimated chromatographically from the adsorptions of low-molecular-weight analogs ...