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聚苯乙烯泡沫塑料是起电、绝缘、绝热的好材料。在精密仪器的包装上、普遍使用聚苯乙烯泡沫塑料作为防震材料。聚苯乙烯泡沫塑料,除了有很好的防震性能之外,还有什么重要的性能呢?我们用聚苯乙烯泡沫塑料跟头发摩擦、跟毛皮摩擦、跟化纤布摩擦,均发现它有良好的起电性能。起电电压很高,能在距指针验电器的金属杆300毫米处就开始放电,使验电器的金属杆带上跟泡沫塑料上所带电荷相同的电荷,而张开一个角度,接触时张开的角度可大于60°角。若手持短氖管的一端与摩擦过的泡沫塑
Styrofoam is a good material for electrification, insulation, and thermal insulation. In the packaging of precision instruments, polystyrene foam is commonly used as a shockproof material. In addition to the excellent shockproof performance of polystyrene foam, what are the important performances? We use polystyrene foam to rub with the hair, rub against the fur, and rub with the chemical fiber cloth, and find that it has good Charging performance. The high voltage of the electricity can be discharged at a distance of 300mm from the metal rod of the electroscope of the hand, so that the metal rod of the electroscope has the same charge as the electric charge on the foam. It opens at an angle and contacts. The angle of opening can be greater than 60°. If you hold the end of a short tube with a foamed foam