聚酯多元醇的羟值测定  

Hydroxyl value measurement for polyester polyol

作　　者：罗东[1] 张爱丽[1] 林农[1] 张洪伟[1] 李文刚[1] 蒋伟忠[1] 

机构地区：[1]东华大学材料学院纤维材料改性国家重点实验室,上海201620

出　　处：《合成纤维工业》2009年第6期63-65,共3页China Synthetic Fiber Industry

摘　　要：采用醋酐加热酰化法,在酰化剂中加入少量高氯酸,测定聚酯多元醇的羟值,计算得到相对分子质量(M_W),并与凝胶色谱法(GPC)所得的M_W进行比较,以评价该方法的准确性。结果表明:该方法简便、快速、准确、经济,测定结果的相对平均偏差为0.19%～0.87%,对于M_W低于5 000的聚酯多元醇其测定结果的误差较低,该方法测定的M_W与GPC法测定的M_W具有较好的一致性。The hydroxyl value of polyester polyol was measured by adding a small amount of perchloric acid into acylating agent and heating acetic anhydride via acylation method. The relative molecular mass （ Mw ） of polyester polyol was calculated and was compared with Mw measured by gel chromatography （ GPC ） for the purpose of measurement accuracy evaluation. The results showed that the method was convenient, quick, accurate and economic. The relative average deviation of this method was 0.19% - 0.87%. The measurement error was relatively low for the polyester polyol with Mw lower than 5 000. The Mw measured by this method had a favorable good consistency with that measured by GPC.

关 键 词：聚酯多元醇羟值 乙酸酐 酰化法 高氯酸 凝胶色谱法 相对分子质量 

分 类 号：TQ317.4[化学工程—高聚物工业]