ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
A dual-calibration method for the determination of molecular weights and molecular weight distribution of styrene-maleic anhydride copolymers (S/MA) by gel permeation chromatography (GPC) is introduced. It might be applicable to copolymers of other type. A linear relationship of intrinsic viscosity [η] and weight-average molecular weight (M̄w) for unfractionated S/MA in tetrahydrofuran (THF) at 25°C can be expressed by the equation \documentclass{article}\pagestyle{empty}\begin{document}$ \left[ \eta \right] = 3.98 \times 10^{ - 4} \bar M_w^{0.596} . $\end{document} The maleic anhydride content of the copolymers ranges from 5 to 50 mole-%, and the M̄w range is from 2 × 104 to 7 × 106. The plot of log [η] M̄w versus GPC elution volume of the S/MA copolymers falls on the same curve as that of the polystyrene standards in THF.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1976.070200619
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