聚乳酸的MH方程常数及其GPC标定线的订定 |
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引用本文: | 王荣伟,郁剑乙,龚燕芳,陈丽娟. 聚乳酸的MH方程常数及其GPC标定线的订定[J]. 石油化工, 1991, 0(5) |
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作者姓名: | 王荣伟 郁剑乙 龚燕芳 陈丽娟 |
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作者单位: | 上海石油化工研究院,上海石油化工研究院,上海石油化工研究院,上海石油化工研究院 上海 200137,上海 200137,上海 200137,上海 200137 |
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摘 要: | 提出了聚乳酸Mark-Houwink方程(简称MH方程)常数订定的方法。订定了在35℃、四氢呋喃中聚乳酸的MH方程常数:K=2.59×10~(-4)dl/g,α=0.689。验证了K、α值的可靠性,GPC测[η]′和实测[η]间的相对偏差,一般在8.0%以下,最大不超过16.0%。
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The Determination of GPC Calibration Curve and Mark--Houwink Constants of Polylactic Acid |
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Abstract: | This paper presents a new method for determination of K and a of MH equ- ation of polylactic acid. The K and a for this kind of polymer in THF at 35t are 2.59×10~(-4)dl/g and 0.689 respectively. The relative error of the new method is generally lower than 8.0%. |
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