Surface modification of silica: 1. Thermodynamic aspects and effect on elastomer reinforcement
Surface modification of silica: 1. Thermodynamic aspects and effect on elastomer reinforcement
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DOI：
10.1016/j.polymer.2004.11.010
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发表时间：
2005-01-26
期刊：
影响因子：
4.6
通讯作者：
Negroni, F
中科院分区：
文献类型：
--
作者：
Castellano, M;Conzatti, L;Negroni, F
对二氧化硅和弹性体之间的相互作用进行了彻底的研究，具体目的是了解双三乙氧基甲硅烷基丙基四硫烷 (TESPT) 的改性程度如何影响填料的表面能和技术化合物的拉伸性能。通过反气相色谱 (IGC) 对用不同量的 TESPT 改性的二氧化硅进行无限稀释进行的热力学研究结果表明，6 至 8 wt% 的接枝 TESPT 时，二氧化硅的表面活性显着降低，并防止颗粒填料彼此相互作用。对负载有二氧化硅的硫化化合物（无论是未改性的还是用不同量的 TESPT 改性的）进行极低和高变形下的拉伸测量，证实了我们的热力学预测，并进一步支持了 TESPT 在促进填料和弹性体之间的相互作用、实现更好的分散和提高机械性能方面的作用。 (C) 2005 Elsevier Ltd. 保留所有权利。
A thorough investigation of the interactions between silica and elastomers was conducted with the specific aim of understanding how the degree of modification with bis-triethoxysilylpropyltetrasulfane (TESPT) influences the surface energy of the filler and the tensile properties of technical compounds. The results of a thermodynamic study carried out by Inverse Gas Chromatography (IGC) at infinite dilution on silica modified with different amounts of TESPT indicate that from 6 to 8 wt% of grafted TESPT the surface activity of silica is considerably reduced and prevents particle fillers from interacting with each others. Tensile measurements at very low and high deformations carried out on vulcanised compounds loaded with silica, either unmodified or modified with different amounts of TESPT, confirm our thermodynamic predictions and further support the role of TESPT in promoting interactions between filler and elastomer, in achieving better dispersions and in improving mechanical properties. (C) 2005 Elsevier Ltd. All rights reserved.