A STUDY ABOUT SOME COMPOSITES WITH THE MATRIX FROM POLYESTER RESIN AND NATURAL REINFORCEMENTS

Alexandru Ioan RĂDOI, Cosmin Mihai MIRIȚOIU, Marius Marinel STĂNESCU, Dumitru BOLCU, Mihaela BOGDAN, Adriana PĂDEANU

Abstract


For this study we manufacture some composites made from a synthetic resin which is obtained by the reaction of some dibasic acids and polyhydric alcohols. This resin is called Crystal super transparent and is a polyester type. This resin is combined with some reinforcers: chicken feathers, corn ear leaves and needles from three firs. The composites will be obtained by the lay-on-hands technique. The casting is made at 200 C. After casting, we obtain some plates with the dimensions identical to an A4 sheet of paper. From the obtained materials we slash some samples for experimental tests (tensile and vibrations). From the tensile experiment we obtain some mechanical properties: the longitudinal modulus of elasticity, the breaking stress at tensile test and breaking elongation. The dynamic behavior of the studied materials will be obtained by free vibration tests. In the end, we make comparisons between the results and we extract the final deductions.

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References


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