| 高交联密度硅橡胶的制备与性能 |
| Preparation and Properties of High Crosslinking density silicone rubber |
| 投稿时间：2018-04-04 修订日期：2018-04-04 |
| DOI： |
| 中文关键词: 硅橡胶 交联密度 硬度 热稳定性 |
| 英文关键词: silicone rubber crosslinking density hardness thermal stability |
| 基金项目: |
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| 中文摘要: |
| 采用了四甲基四乙烯基环四硅氧烷和四甲基四氢环四硅氧烷在铂金催化剂的作用下发生硅氢加成反应得到了高交联密度的硬质硅橡胶,制备过程中采用了“液面悬浮”和“阶梯升温”的工艺。利用差示扫描量热仪、傅里叶红外光谱仪、原子力显微镜、邵氏硬度计和热重分析仪分别对其固化过程、表面性能、硬度和热稳定性进行研究,并利用了平衡溶胀法计算了其交联密度。实验结果表明：阶梯升温能有效控制交联反应；硅橡胶具有极低的粗糙度,均方根粗糙度Rq为1.74 nm,平均粗糙度Ra为1.39 nm；邵氏D硬度为78.3；交联密度为2.87′10-3 mol/cm-3；硅橡胶在质量损失为5%时,对应温度为602.1 o C,最终的残余量为83.57%。 |
| 英文摘要: |
| high crosslinking density and hard silicone rubber was obtained by hydrosilylation of tetramethyltetravinylcyclotetrasiloxane and tetramethyltetrahydrocyclotetrasiloxane under the action of platinum catalyst. The process of "liquid level suspension" and "multi-step heating" were adopted in the preparation process. The curing process, surface properties, hardness and thermal stability were studied by DSC,Fourier transform infrared spectrometer, atomic force microscope, Shao hardness tester and thermogravimetric analyzer, respectively. The crosslinking density was calculated by equilibrium swelling method. The experimental results show that: multi-step heating can effectively control the crosslinking reaction; and the silicone rubber has a very low roughness, and RMS roughness Rq is 1.74 nm, and average roughness of Ra is 1.39 nm; hardness of Shao D is 78.3; crosslinking density is 2.87′10-3 mol/cm-3; when the mass loss of silicone rubber is 5%, the corresponding temperature is 602.1 o C, and the final residual amount is 83.57%. |
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