期刊
POLIMEROS-CIENCIA E TECNOLOGIA
卷 20, 期 -, 页码 407-414出版社
ASSOC BRASIL POLIMEROS
DOI: 10.1590/S0104-14282011005000002
关键词
Polymer foam; EVA; EPDM; crosslinking agent; physical and mechanical properties
Polymer foams are biphasic materials prepared with a polymer matrix and a gaseous phase from a foaming agent. Products based on this type of material are currently in a good market position due to the good mechanical properties, low density and competitive cost. Blending EVA with elastomers is a feasible alternative to enhance the properties of the expandable compounds. Among the elastomers used as a blend component with EVA, EPDM has a high potential since it has a good compatibility with polyolefins. Considering that during the foam processing there are simultaneous crosslinking reactions and the formation of gases, the balance between these two effects has a strong influence over the physical characteristics of the final product. In this study the effect of a crosslinking agent on EVA/EPDM foams was investigated. The physical, mechanical and rheometric properties, as well as the foam morphology, were analyzed as a function of dicumil peroxide, used as a crosslinking agent. The results showed that this additive has a strong influence in the crooking and expansion of the compounds, affecting their properties.
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