ISSN:
0887-624X
Keywords:
gel permeation chromatography
;
star polymer
;
block copolymer
;
butadiene
;
styrene
;
silicon tetrachloride
;
light scattering
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A novel GPC calculation method has been developed for characterizing star-shaped styrene-butadiene block copolymers (SBS). This method enables us to determine the degree of branching (number of arms per molecule) of the synthesized polymer without the need of a priori measurement of the true molecular weights of the SBS star polymer and its linear polymeric arm. To illustrate the simplicity of this method, nearly monodispersed three-arm and four-arm model star polymers have been purposely synthesized by linking living diblock polymeric arms of the polystyrene-block-polybutadiene type with silicon tetrachloride as the multifunctional linking agent. The good agreement between the degree of branching calculated from the GPC chromatogram and that actually measured by MALL (multiple angle laser light scattering) has corroborated the validity of the calculation method. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35: 3393-3401, 1997
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
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