| Wesslau分布和Lansing-Kraemer分布在给定区间内的平均分子量 |
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| 引用本文： | 戴裕昆.Wesslau分布和Lansing-Kraemer分布在给定区间内的平均分子量[J].应用化学,1986,0(6):48-53. |
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| 作者姓名： | 戴裕昆 |
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| 作者单位： | 中国科学院长春应用化学研究所 |
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| 摘 要： | 由于Wesslau公式不够精确,用于计算分布较宽的正态GPC曲线将导致较大的误差。这一问题以往尚未为人们所觉察,本文推导出Wesslau分布及Lansins-Kraemer分布在给定区间内M的计算公式,不但可提高函数法计算M的准确度,而且对分布曲线的性质得出了一些新的结论。还指出了提高GPC法测定宽分布试样M准确度的途径。
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| 收稿时间： | 1985-08-16 |
THE AVERAGE MOLECULAR WEIGHT IN A GIVEN INTERVAL OF WESSLAU DISTRIBUTION AND LANSING-KRAEMER DISTRIBUTION |
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| Dai Yukun.THE AVERAGE MOLECULAR WEIGHT IN A GIVEN INTERVAL OF WESSLAU DISTRIBUTION AND LANSING-KRAEMER DISTRIBUTION[J].Chinese Journal of Applied Chemistry,1986,0(6):48-53. |
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| Authors: | Dai Yukun |
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| Institution: | Changchun Institute of Applied Chemistry, Academia Sinica |
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| Abstract: | A formula for calculating M in a given interval of Wesslau distribution and Lansing-Kraemer distribution has been derived. It is impossible that the molecular weight of any polymer will distribute over the whole range of 0-∞, hencc a GPC curve always has two boundaries. Therefore a GPC curve should be treated as a normal distribution curve wih its side tails cut out. This paper has shown that three parame-ters (M0, β and UR ) are necessary for characterizing a normal GPC curve.The precision of M calculated from GPC curve by Wesslau function is discussed. |
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