期刊
POLYMER
卷 43, 期 15, 页码 4311-4314出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0032-3861(02)00245-8
关键词
maleic anhydride; alpha-olefin; alternating copolymers
The number average molar mass M-n of poly(octadecene-alt-maleic anhydride) (PODMA) copolymers calculated from data obtained by size exclusion chromatography (SEC) using a polystyrene (PS) calibration was found to be inaccurate. The use of SEC combined with dilute solution viscometry enabled a method to be developed using an iterative approach, which does not require knowledge of the Mark-Houwink constants for PODMA samples. A new calibration curve was constructed as a plot of molar mass M-n for PODMA. True number-average molar masses M-n (true) calculated using the new calibration are approximately twice the apparent molar mass M-n (app) based on a PS calibration for higher molar mass samples (> 10 000 g mol(-1)). (C) 2002 Published by Elsevier Science Ltd.
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