The PS water reducing agent, which is very effective for concrete, has been made from waste polystyrene(WPS) by sulfuric acid of fuming sulfuric acid sulfonation process.
以废聚苯乙烯（WPS）泡沫为原料，采用浓硫酸和发烟硫酸两种磺化方法制备性能良好的砼减水剂。
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To ensure low leakage current and low dielectric absorption, the feed back capacitor should be made of a suitable dielectric material such as polystyrene, polypropylene, or Teflon.
The invention belongs to the field of inorganic materials technology, specifically as a solid acid catalyst - grafted polystyrene sulfonic acid preparation method of carbon nanotubes.