The influence of two multiarm star polymers,
hyperbranched poly(glycidol)-b-poly(e-caprolactone) of
different arm lengths, on the thermal curing and the
photocuring of a diglycidyl ether of bisphenol A epoxy
resin (DGEBA) is studied. Star polymer with short arms
PCL-10 decelerates more the thermal curing than the
polymer with long arms PCL-30 because the latter is less
solubilized in the epoxy matrix and its effect on the polymerization
of the resin and the thermal–mechanical properties
is les...
The influence of two multiarm star polymers,
hyperbranched poly(glycidol)-b-poly(e-caprolactone) of
different arm lengths, on the thermal curing and the
photocuring of a diglycidyl ether of bisphenol A epoxy
resin (DGEBA) is studied. Star polymer with short arms
PCL-10 decelerates more the thermal curing than the
polymer with long arms PCL-30 because the latter is less
solubilized in the epoxy matrix and its effect on the polymerization
of the resin and the thermal–mechanical properties
is less important. The kinetic triplet corresponding to
the thermal curing of the different formulations has been
determined. In the analysis of the photocuring process, we
have also found that short-arm star PCL-10 is better solubilized
in the epoxy matrix and its effect on the photocuring
kinetics is more significant than that of the long-arm
star. The effect of both polymers on the thermal–mechanical
properties of the cured thermosets is less important due
to the lower solubility at the relatively low photocuring
temperatures.
The influence of two multiarm star polymers, hyperbranched poly(glycidol)-b-poly(e-caprolactone) of different arm lengths, on the thermal curing and the photocuring of a diglycidyl ether of bisphenol A epoxy resin (DGEBA) is studied. Star polymer with short arms PCL-10 decelerates more the thermal curing than the polymer with long arms PCL-30 because the latter is less solubilized in the epoxy matrix and its effect on the polymerization of the resin and the thermal-mechanical properties is less important. The kinetic triplet corresponding to the thermal curing of the different formulations has been determined. In the analysis of the photocuring process, we have also found that short-arm star PCL-10 is better solubilized in the epoxy matrix and its effect on the photocuring kinetics is more significant than that of the long-arm star. The effect of both polymers on the thermal-mechanical properties of the cured thermosets is less important due to the lower solubility at the relatively low photocuring temperatures.
Citació
Morancho, J. [et al.]. Thermal curing and photocuring of a DGEBA modified with multiarm star poly(glycidol)-b-poly(e-caprolactone) polymers of different arm lengths. "Journal of thermal analysis and calorimetry", Octubre 2013, vol. 114, p. 409-416.
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