| 不同分子量聚酯的羟值分析方法 |
| |
| 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 |
| |
| 作者姓名： | 俞晓薇 胡巧玲 |
| |
| 作者单位： | 杭州大学化学系!310028 |
| |
| 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。
|
| 关 键 词： | 聚酯 羟值 分子量 端基分析 |
Hydroxyl Number Determination of Polyesters with Different Molecular Weight |
| |
| 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 |
| |
| Authors: | Yu Xiaowei Hu Qiaoling Fu Yanbin Zhu Yongqun |
| |
| 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. |
| |
| Keywords: | Polyester Hydroxyl number Molecular weight End-group analysis |
| 本文献已被 CNKI 维普 等数据库收录！ |
