一种改进的催化酰化方法测定聚醚多元醇的羟值[EB/OL]
北京:中国科技论文在线
快速适用的对甲苯磺酸催化的乙酸酐—石油醚体系催化酰化法
) 摘要: 本文对测定聚醚多元醇羟值的酰化方法进行改进
该催化酰化法避免使用有毒的吡啶试剂
该催化酰化反应在250 mL碘量瓶中进行
胡学一
操作简便
胡学一
提出了操作简便
) Abstract: A modified catalysis acylation method to determine hydroxyl value of polyether polyol is proposed in this paper
The hydroxyl value of polyether polyol is determined based on the catalyzed acylation using p-toluenesuflonic acid as catalyst in the mixed reagent of acetic anhydride and petroleum ether instead of acetic anhydride and hazardous pyridine
The catalysis acylation is completed in a 250 mL iodine flask which was heated in a water bath(50oC) for 30 min under electromagnetic stirring
The apparatus used is simple and readily manipulated and the result obtained is satisfactory
Keywords: polyether polyol;hydroxyl value;acetic anhydride;p-toluenesuflonic acid;petroleum ether 下载PDF阅读器 PDF全文下载: 初稿 ( 249 ) 作者简介: 通信联系人: 【收录情况】 中国科技论文在线: 何志强
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