MENISCUS DEPLETION ULTRA-CENTRIFUGATION .1. PSEUDOIDEAL SOLUTIONS

被引：4

作者：

SUZUKI, H

机构：

来源：

BRITISH POLYMER JOURNAL | 1979年 / 11卷 / 02期

关键词：

D O I：

10.1002/pi.4980110210

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In view of the recent advances in the theory of sedimentation equilibrium, the meniscus depletion is reformulated and extended to reveal its potentialities. To cope with poly disperse materials such that fringes become unresolvable near the cell bottom, an extrapolation method is proposed using the newly defined average molecular weights at a given radial position. The main purpose of the method is to pave the way for determining the number-average molecular weight of a sample. Its application to a linear polystyrene sample having the weight-average molecular weight of twenty seven million are reported. Uses and limitations of the present method are discussed in detail.

引用

页码：91 / 96

页数：6

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