| 超细碳酸钙填料在脱丙酮型RTV-1硅橡胶中的应用研究 |
| Application of ultrafine calcium carbonate powder in deacetonized RTV-1 silicone rubber |
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| DOI： |
| 中文关键词: 超细碳酸钙 脱丙酮型RTV-1硅橡胶 填充补强剂 |
| 英文关键词: ultrafine calcium carbonate deacetonized RTV-1 silicone rubber filler |
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| 中文摘要: |
| 研究了碳酸钙粒径大小及其在体系中的分散状况对脱丙酮型RTV-1硅橡胶性能的影响。结果表明，采用粒径小于0.08μm、表面经脂肪酸处理的超细碳酸钙可制备拉伸强度大于1.35 MPa，扯断伸长率大于357%且具有较好触变性能的脱丙酮型RTV-1硅橡胶;混料过程中采用较高的脱水温度易产生碳酸钙密集的聚集体，使硅橡胶拉伸强度和扯断伸长率下降;体系中分散不均匀的聚集体可能容易诱发应力缺陷，是导致硅橡胶断裂的重要原因之一。 |
| 英文摘要: |
| The influence of the particle size and dispersion of ultrafine calcium carbonate on the properties of the deacetonized RTV-1 silicone rubber was studied. The results showed that the deacetonized RTV-1 silicone rubber with tensile strength＞1.35 MPa, elongation at break＞357% and better thixotropy could be obtained by adding a fatty acid-treated ultrafine calcium carbonate with particle size＜0.08 μm; the higher dehydration temperature during mixing might cause concentrated calcium carbonate aggregates resulting in lower tensile strength and elongation at break of silicone rubber;and the ununiformly dispersed aggregates in the system could cause stress concentration resulting in
premature fracture of silicone rubber. |
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