| 一种简便渗透压法测定高聚物分子量 |
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| 引用本文： | 张俐娜,邹从炎,何从乐,田黎.一种简便渗透压法测定高聚物分子量[J].高等学校化学学报,1984,5(6):884. |
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| 作者姓名： | 张俐娜 邹从炎 何从乐 田黎 |
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| 作者单位： | 武汉大学化学系 |
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| 摘 要： | 本工作采用一种改进的一膜两室渗透计和简便动态渗透压法测定了一系列聚合物的数均分子量,该法操作方便、快速、可靠,测定分子量相对误差在±5％以内。
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| 收稿时间： | 1983-04-09 |
Determination of Molecular Weight for Polymers by Simple Osmometry |
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| Zhang Lina,Zou Congyan,He Congle,Tian Li.Determination of Molecular Weight for Polymers by Simple Osmometry[J].Chemical Research In Chinese Universities,1984,5(6):884. |
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| Authors: | Zhang Lina Zou Congyan He Congle Tian Li |
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| Institution: | Department of Chemistry, University Wuhan |
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| Abstract: | The number average molecular weight for polystyrene standards, poly-vinylchloride fraction and unfraction, vinyl chloride/vinyl acetate/vinyl alcohol copolymer, polymethylmethacrylate and polyacrylonitryle have been determined by a improved osmometer included one membrane and two chambers, and a simple dynamic osmometry. The osmotic pressure was determined by passing a flow of solvent through the membrane into the solution and extrapolating to zero flow rate. THF, acetone and DMFhave been used satisfactory as solvent in the measurement. The method is co-vennient to operate, rapid and reliable. Individual molecular weight measurements are accurete within ± 5 %. |
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