| 有机粘土/丁基橡胶纳米复合材料的结构与性能 |
| Structure and Properties of Organic Clay/IIR Nanocomposites |
| 投稿时间：2021-04-13 修订日期：2021-04-15 |
| DOI：10.12136/j.issn.1000-890X.2021.12.0912 |
| 中文关键词: 丁基橡胶 有机粘土 纳米复合材料 拉伸性能 滞后圈 微观相态 气体阻隔性能 |
| 英文关键词: butyl rubber organic clay nanocomposite tensile property hysteresis ring microscopic phase state gas barrier performance |
| 基金项目:国家自然科学基金资助项目（51573124） |
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| 中文摘要: |
| 采用熔体共混法制备有机粘土（OC）/丁基橡胶（IIR）纳米复合材料（IIRCNs），研究OC的结构变化以及IIRCNs的物理性能、微观相态和气体阻隔性能。结果表明：OC用量为10份时，IIRCNs中的OC片层间距增至4. 09 nm（OC的起始片层间距为2. 96 nm)，形成插层结构良好的复合材料，IIRCNs的拉伸强度为16. 20 MPa，较IIR胶料的8. 00 MPa提高102%，且OC在橡胶基质中的分散形态较为细致、均匀；经过预应力循环拉伸处理后，IIRCNs的拉伸强度达到17. 30MPa，较未预应力循环处理的16. 20 MPa提高6. 8%；具有较大长径比的OC均匀分布在橡胶基质中，大幅提高复合材料的
气体阻隔性能，气体渗透率较IIR胶料下降25%。 |
| 英文摘要: |
| Organic clay（OC）/butyl rubber（IIR） nanocomposites（IIRCNs） were prepared by melt
blending method，and the structural changes of OC and the physical properties，microscopic phase state and
gas barrier performances of IIRCNs were studied. The results showed that when the additional level of OC
was 10 phr，the clay lamellar spacing of OC in IIRCNs increased to 4. 09 nm（the initial lamellar spacing of
OC was 2. 96 nm），indicating the formation of intercalated structure. The tensile strength of IIRCNs was
16. 20 MPa，which was 102% higher than IIR compound’s 8. 0 MPa，and the dispersion of OC in the rubber
matrix was finer and more uniform. After prestressed cyclic tensile treatment，the tensile strength of IIRCNs
reached 17. 30 MPa，which was 6. 8% higher than that of the IIRCNs without prestressed cyclic tensile
treatment. The OC with large aspect ratio was uniformly distributed in the rubber matrix，which greatly
improved the gas barrier performances of the composites，and the gas permeability of IIRCNs was 25% lower
than that of IIR compound. |
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