Estimating the molecular mass between epoxy-amine network junctions from glass-transition-temperature data |
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Authors: | E S Zhavoronok I N Senchikhin V I Roldugin |
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Institution: | 1.Frumkin Institute of Physical Chemistry and Electrochemistry,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | The average molecular mass between network junctions is estimated for several epoxy-amine systems of various compositions
with comparable molecular masses of the epoxy oligomer and the curing agent. This estimation is based on the experimental
data on glass-transition temperatures of curing epoxy-amine mixtures. The constant that relates these physicochemical characteristics
is dependent on the nature of the epoxy-amine system and the rigidity of polymer chains located between network junctions.
Correlations are found between the constant and the glass-transition temperature of the crosslinked epoxy-amine system and
between the constant and the difference in the glass-transition temperatures of uncured and ultimately cured epoxy-amine systems. |
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