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Current Project
Polymer
Division
(IV)
-
to establish critical
LC conditions for poly(ethylene glycol) using a given experimental
procedure,
-
to compare the critical
eluents compositions in the partner laboratories,
-
to separate and quantify
a given number of PEO test samples with regard to functionality
type distribution, and
-
to compare the results
with regard to accuracy and reproducibility. Finally, conclusions
shall be withdrawn on the robustness of LC-CC procedures in daily
routine.
Description:
A range of poly ethylene glycols (PEG) having different molar masses
will be characterized by liquid chromatographic methods. We will
mainly focus on the liquid chromatography at the critical point
of adsorption (LC-CC) Using these technique polymers can be separated
selectively with regard to chemical composition or functionality,
as has been shown for macromonomers, random and block copolymers,
and polymer blends. Since the method becomes widely used it is necessary
to find and establish standard procedures and to study the accuracy
and reproducibility.
Data will be accumulated from different labs in an academic and
industrial environment. A further key will be to study the sensitivity
of the different experimental conditions applied in the different
labs. An ambiguous target will be the characterization of "real
world samples" e.g. PEG's having different endgroups. We will
concentrate on PEO's having fatty alcohol endgroups which are of
particular interest for industrial applicationsAlso we will study
different PEO-PPO copolymers which are used as precursors for instance
for polyurethanes. Typically they are made using multifunctional
starters (e.g. TMP, Gycerol) an can exhibit a great variety of chemical
compositions.
Last update: 26 November 2006
<project announcement to be published
in Chem. Int. >
If you
want to update this information, contact us by e-mail
Do not forget to include the Project Number,
your name and relation with that project
Page last modified 26 November 2006.
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