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嚇嚇蟲木蟲 (著名寫手)
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[交流]
【求助】磺化聚苯乙烯的問題
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| 請教蟲友們:磺化聚苯乙烯時用的是不是濃硫酸?磺化條件是什么?磺化后該怎樣分離出聚苯乙烯? |
鐵蟲 (小有名氣)
鐵桿木蟲 (正式寫手)
銀蟲 (初入文壇)
銅蟲 (初入文壇)
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US patent: The sulfonating reagent, acetyl sulfate, was prepared by slowly adding sulfuric acid to a solution of acetic anhydride in 1,2-dichloroethane (DCE) at 0℃. The freshly prepared acetyl sulfate was then added to a well-stirred solution of the polymer in DCE at 50℃. After 1h the reaction was terminated by the addition of ethanol. The sulfonated polymer was isolated by steam distillation, washed with methanol, dried at room temperature for 3 days, and dried under vacuum above the Tg for another 3 days. |

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