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首页> 外文期刊>Journal of Applied Polymer Science >Thermal stability and ablation properties study of aluminum silicate ceramic fiber and acicular wollastonite filled silicone rubber composite
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Thermal stability and ablation properties study of aluminum silicate ceramic fiber and acicular wollastonite filled silicone rubber composite

机译：硅酸铝陶瓷纤维与针状硅灰石填充硅橡胶复合材料的热稳定性和烧蚀性能研究

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摘要

The thermal stability and ablation properties of silicone rubber filled with silica (SiO_2), aluminum silicate ceramic fiber (ASF), and acicular wollastonite (AW) were studied in this article. The morphology, composition, and ablation properties of the composite were analyzed after oxyacetylene torch tests. There were three different ceramic layers found in the ablated composite. In the porous ceramic layer, the rubber was decomposed, producing trimers, tetramers, and SiO_2. ASF and part of AW still remained and formed a dense layer. The SiO_2/SiC filaments in the ceramic layer reduced the permeability of oxygen, improving the ablation properties of the composites. The resultant ceramic layer was the densest, which acted as effective oxygen and heat barriers, and the achieved line ablation rate of the silicone composite were optimum at the proportion of 20 phr/40 phr (ASF/AW). Thermogravimetric analysis (TGA) confirmed that thermal stability of the composites was enhanced by the incorporation of ASF and AW. The formation of the ceramic layer was considered to be responsible for the enhancement of thermal stability and ablation properties.
机译：本文研究了填充二氧化硅（SiO_2），硅酸铝陶瓷纤维（ASF）和针状硅灰石（AW）的硅橡胶的热稳定性和烧蚀性能。经过氧乙炔焊炬测试后，对复合材料的形貌，组成和烧蚀性能进行了分析。在烧蚀的复合物中发现了三种不同的陶瓷层。在多孔陶瓷层中，橡胶分解，产生三聚体，四聚体和SiO_2。 ASF和AW的一部分仍然保留并形成致密层。陶瓷层中的SiO_2 / SiC细丝降低了氧气的渗透性，改善了复合材料的烧蚀性能。所得的陶瓷层是最致密的，充当有效的氧气和热障，并且在20 phr / 40 phr（ASF / AW）的比例下，有机硅复合材料获得的线烧蚀率最佳。热重分析（TGA）证实，通过掺入ASF和AW可以增强复合材料的热稳定性。陶瓷层的形成被认为是增强热稳定性和烧蚀性能的原因。

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