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An Experimental Study on Mechanical and Microstructural Properties of Microcellular Foams of ABS Composites

Kazemi Beydokhti Kamran نويسنده , Behravesh Amir H. نويسنده , Azdast Taher نويسنده

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Microcellular tiny cells, these foams are foamed plastics characterized by a cell density typically greater than 109 cells/crnיי and cell sizes on the order of 10 urn. As the blowing agent, an inert gas such as CO2 or N2 is usually used. Because of very foams exhibit improved mechanical and physical properties, for instance, strength-to-density, toughness, thermal and electrical properties are highly improved. In this paper, structural and mechanical properties of microcellular foams of ABS and its composites (glass fibre and mineral filled) are studied and compared. Gas absorption, gas desorption, density, size and number of microcells, and most importantly, ultimate tensile strength and ultimate strain are compared. The results show that a sound microcellular structure and a high strength-to-density can be obtained by regulating temperature and time at the vicinity of glass transition temperature. The results also revealed that although mechanical properties are improved, the enhancement is not as it has been widely asserted.

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