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首页> 外文会议>Regional Conference of the Polymer Processing Society >Flexible Epoxy Based Composites with Enhanced Delamination Resistance
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Flexible Epoxy Based Composites with Enhanced Delamination Resistance

机译：基于柔性环氧基复合材料，具有增强的分层抗性

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This work highlights new strategies for the preparation of flexible epoxy-silicone rubber laminates, which promote high delamination resistance of stator bar insulations. Silicone rubber based damping layers are placed within rigid layered insulating composite materials to reduce thermo-mechanical stresses that particularly arise during on-off operation of rotating machines. To provide a good adhesion and covalent bonding between the elastomer layer and the epoxy based matrix, mercapto functional organosilanes are immobilized onto the silicone rubber surface by a two-step modification route. The surface characteristics of the damping layers prior to and after the functionalization process are characterized by means of contact angle measurements and XPS spectroscopy. Model insulations with the flexible damping layer are prepared by vacuum pressure impregnation process and the influence of the damping layer on the thermo-mechanical properties such as storage modulus, glass transition temperature and bending strength is determined. It can be obtained, that the flexibility of the new composite materials can be increased significantly, whilst the glass transition temperature is not affected by the elastomer layer. In a further step, stator bar prototypes with modified elastomeric damping layers are manufactured on-site to evaluate the electrical performance and the delamination resistance. The results reveal that both high-voltage endurance as well as delamination resistance can be improved considerably by the incorporated flexible layers. However, the electrical properties including loss factor or partial discharge magnitude are not influenced. From the results it can be concluded that the employment of flexible layers offers an innovative approach towards the manufacture of high-voltage generators with extended life-time, as reliability and longevity of high-voltage generators are directly related to the delamination resistance of the insulating composites.
机译：这项工作凸显了柔性环氧树脂橡胶层压板的制备的新策略，这促进了定子棒绝缘的高分层电阻。硅橡胶基阻尼层置于刚性层状绝缘复合材料内，以减少在旋转机器的接通操作期间特别出现的热机械应力。为了在弹性体层和环氧基质之间提供良好的粘合和共价键合，巯基官能团通过两步修饰途径将官能团固定到硅橡胶表面上。通过接触角测量和XPS光谱，在功能化过程之前和之后的阻尼层的表面特性。利用柔性阻尼层的模型绝缘通过真空浸渍过程制备，并且测定阻尼层对诸如储存模量，玻璃化转变温度和弯曲强度的热机械性能的影响。可以获得，新复合材料的柔韧性可以显着增加，同时玻璃化转变温度不受弹性体层的影响。在进一步的步骤中，具有改进的弹性体阻尼层的定子杆原型在现场制造以评估电性能和分层电阻。结果表明，通过合并的柔性层可以显着提高高压耐久性以及分层电阻。然而，包括损耗因子或局部放电幅度的电性能不会影响。从结果中可以得出结论，柔性层的就业提供了一种创新的方法，可以延长寿命的高压发电机，因为高压发生器的可靠性和寿命直接与绝缘的分层电阻有关复合材料。

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