Curing kinetics of liquid-crystalline epoxy resins |
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| Authors: | C Carfagna E Amendola M Giamberini A G Filippov R S Bauer |
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| Institution: |
a Department of Materials and Production Engineering, University of Naples 'Federico II', Napoli, Italy
b Westhollow Research Center, Shell Development Company, Houston, Texas, U.S.A. |
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| Abstract: | By endcapping mesogenic rigid rod molecules with reactive epoxy groups a novel class of liquid-crystalline thermoset has been obtained. In fact is has been shown that the nematic molecular arrangement is sustained over the crosslinking reaction of liquid-crystalline epoxy resins when the curing reaction is carried out in the thermal stability range of the liquid-crystalline phase. Calorimetric analysis was used in characterizing the isothermal cure. An unsophisticated model is proposed for evaluating the activation energies of the crosslinking reaction. For liquid-crystalline epoxy resins lower activation energies result with respect to the cure reactions for non liquid-crystalline epoxy resins. |
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