Accurate Calibration of a Gel-Permeation Chromatograph by Use of Broad Molecular Weight Distribution Standards
作者:
R.P. Chaplin,
W. Ching,
期刊:
Journal of Macromolecular Science: Part A - Chemistry
(Taylor Available online 1980)
卷期:
Volume 14,
issue 2
页码: 257-263
ISSN:0022-233X
年代: 1980
DOI:10.1080/00222338008066636
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Two methods for developing GPC calibration parameters for any polymer are described and compared. The first method assumes a quadratic calibration curve of the form log M = C1+ C2V + C3V2, where V is the retention volume, and utilizes molecular weight averages of a polymer standard combined with nonlinear regression analysis to determine values of the constants C1, C2, and C3. No reference to a standard polystyrene curve is necessary. The second method assumes the validity of the universal calibration technique in which the calibration curve of any polymer can be determined with reference to a standard polystyrene curve provided representative Mark-Houwink parameters are available. The chromatographic data is used to determine these parameters for any polymer. Results of applying both procedures to polystyrene, polybutadiene, poly(methyl methacrylate), and poly(vinyl chloride) are presented and show that in most instances the second method is simpler to apply and more accurate.
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