Effect of Thermoplastic Incorporation on the Performance of Thermosetting Matrix

Ollier, R.; Stocchi, A.; Rodriguez, E.; Alvarez, V.
July 2012
Materials Sciences & Applications;Jul2012, Vol. 3 Issue 7, p442
Academic Journal
In this work, the morphology, thermal and viscoelastic properties, deformation and fracture behaviour of a commercial vinylester resin modified with a biodegradable polymer was investigated. Flexural, impact and fracture tests were performed on the blends with different polycaprolactone (PCL) contents. They exhibited improved stiffness and fracture properties in comparison to the neat resin. From SEM analysis of fracture surfaces, stress whitening and branced fracture paths toughening mechanisms were identified. The dependence of the glass transition temperature with PCL content was adequately fitted by simple models available in the literature. From the results of these models along with the results of calorimetric studies and SEM analysis, it can be concluded that the interaction between vinylester and PCL is strong enough to avoid phase separation.


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