就双乙烯酮与异丙醇在不同催化剂下反应生成乙酰乙酸异丙酯的条件及结果进行了讨论，并提供了实验数据。
The conditions and results of the reaction of diketene with isopropyl alcohol in the presence of different catalysts are discussed and some experimental data are provided.
本文以聚矾和磺化聚砜共混物为膜材料，二甲基乙酰胺为溶剂，聚乙烯吡咯啉酮和邻苯二甲酸二甲酯为添加剂配制纺丝液，纺制外压中空纤维超滤膜。
This paper reported the preparation of hollow fiber UF membrane, using PS and SPS as membrane spinning materials, DMA as solvent, PVPand dimethyl phthalate as additives.
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