| 不同分子量聚酯的羟值分析方法 |
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| 引用本文： | 俞晓薇,胡巧玲.不同分子量聚酯的羟值分析方法[J].聚氨酯工业,1997,12(1):44-46. |
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| 作者姓名： | 俞晓薇 胡巧玲 |
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| 作者单位： | 杭州大学化学系!310028 |
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| 摘 要： | 用醋酐／高氯酸／乙酸乙酯法，醋酐吡啶回流法，分别对相对分子质量为１１００－１２０００的聚酯进行了羟值的测定，并用气压渗透法和析出物溶解重滴法进行了核对。结果表明醋酐／高氯酸／乙酸乙酯法对于Ｍ〈５０００的聚酯是适用的，而高分子量的聚酯则必须用醋酐／吡啶回流法，才能获得满意的结果。
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| 关 键 词： | 聚酯 羟值 分子量 端基分析 |
Hydroxyl Number Determination of Polyesters with Different Molecular Weight |
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| Yu Xiaowei, Hu Qiaoling, Fu Yanbin ,Zhu Yongqun.Hydroxyl Number Determination of Polyesters with Different Molecular Weight[J].Polyurethane Industry,1997,12(1):44-46. |
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| Authors: | Yu Xiaowei Hu Qiaoling Fu Yanbin Zhu Yongqun |
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| Abstract: | The hydroxyl number of polyester diols with different molecular weight (M=1 100~12 ooo) has been determined by end-group analysis, which include acetic anhydride/perchloric acid/acetic acetate and acetic anhydride/pyridine method. The mo1ecularweight calculated was checked by vapour pressure osmometry. The result shows acetic an-hydride/perchloric acid/acetic acetate method is suitable for polyester diols with M<5000. But to the higher molecular weight polyester,accurate result will be obtainted whenadopt acetic anhydride /pyridine reflux method. |
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| Keywords: | Polyester Hydroxyl number Molecular weight End-group analysis |
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