he use of commercially available hyperbranched\ud
poly(ethyleneimine)s (Lupasol\ud
TM\ud
, BASF) as polymeric modifiers\ud
in diglycidyl ether of bisphenol A thermosetting formulations\ud
using 1-methylimidazole (MI) as anionic initiator has been\ud
studied. Poly(ethyleneimine)s can get incorporated into the\ud
network structure by condensation of amine and epoxy groups.\ud
The excess, over-stoichiometric epoxy groups can undergo ani-\ud
onic homopolymerization initiated by MI. The thermal, dyna-\ud
momechanical, and mechanical properties of the resulting\ud
materials have been determined using DSC, thermomechanical\ud
analysis (TMA), dynamomechanical analysis (DMA), and me-\ud
chanical testing. The effect of the different amine modifiers on\ud
the MI networks, determined by their structure, is complex.\ud
Low initiator content and high molecular weight modifiers cre-\ud
ate significant mobility restrictions, which have a strong effect\ud
on the glass transition temperature and the apparent crosslink-\ud
ing density of the cured materials.Postprint (published version
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