| 利用凝胶渗透色谱示差-紫外检测器联用测定丁苯共聚物的组成分布 |
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| 引用本文： | 张志远,谷晓昱.利用凝胶渗透色谱示差-紫外检测器联用测定丁苯共聚物的组成分布[J].分析试验室,2007,26(4):104-107. |
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| 作者姓名： | 张志远 谷晓昱 |
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| 作者单位： | 北京化工大学材料科学与工程学院,北京,100029 |
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| 摘 要： | 将凝胶渗透色谱(GPC)中的示差与紫外检测器联用,测定了无规共聚丁苯橡胶和SBS三元嵌段共聚物中各级分的组成变化.实验方法选择中对比了两种浓度参数的确定方法,发现通过改变注射量来实现浓度变化的方法优于使用系列浓度样品的方法.分别测定标准样品在紫外和示差检测器上信号产生的时间间隔可以确定两个检测器上信号的时间差.根据紫外-示差检测器联用可以看到SBR无规共聚物和三嵌段SBS共聚物样品中每一个级分中随着相对分子质量的变化,苯乙烯含量的变化.
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| 关 键 词： | 共聚物 组成分布 示差检测器 紫外检测器 凝胶渗透色谱 |
| 文章编号： | 1000-0720（2007）04-104-04 |
| 修稿时间： | 2006-06-062006-07-21 |
Determination of composition distribution of styrene-butadiene copolymer by gel-permeation chromatography with a refractive index detector and a photodiode array detector |
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| ZHANG Zhi-yuan,GU Xiao-yu.Determination of composition distribution of styrene-butadiene copolymer by gel-permeation chromatography with a refractive index detector and a photodiode array detector[J].Chinese Journal of Analysis Laboratory,2007,26(4):104-107. |
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| Authors: | ZHANG Zhi-yuan GU Xiao-yu |
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| Institution: | College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029 |
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| Abstract: | A method for the determination of composition distribution for SBR and SBS copolymer by gel-permeation chromatography with duel detectors,the refractive index detector and the photodiode array detector was proposed.The concentration parameters were determined by measuring injection volume.The time intermission between the refractive index detector and the photodiode array detector was determined by calculating the time intermission of some standard sample peak position.According to the method mentioned above,the point-by point composition distribution of the SBR and SBS copolymer was characterized. |
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| Keywords: | Gel permeation chromatography (GPC) Copolymer Composition distribution Refractive index detector Photodiode array detector |
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