A thermoplastic polystyrene-based material with styrene-butadiene-styrene dispersed particles and a thermoset polyester toughened with butadiene-acrylonitrile particles were studied. Photomicrographs of materials that had different proportions of elastomer were processed and the images analysed. The changes in the morphological characteristics were correlated with the fracture toughness and modulus of elasticity.
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