Murilo Sanson

A Mono-Material Sports Helmet By Graded Foaming

Abstract: Foams made of ethylene-vinyl acetate copolymers (EVA) are widely used for different applications such as footwear, toys, carpets, sports equipment, etc. However, EVA foams usually do not exhibit a good balance of mechanical properties at lower hardness. Thus, new materials are being developed in order to circumvent this problem. In this work, a comprehensive compositional study was performed on foams made with new-to-the-world ethylene based terpolymers. Design of experiments along with regression and variance analysis were used in order to understand the effects of terpolymer chemical composition, blending with EVA, peroxide and chemical foaming agent contents over properties such as hardness, density, rebound resilience, compression set and uniaxial tensile strength. Observed trends related to the formulation components in the raw data were same as the ones predicted in the literature and the statistical tool. In addition, important interactions between factors (peroxide and CFA contents; chemical composition of the terpolymer and blending with EVA), were detected through the regression analysis.

Biography: Murilo Lauer Sanson is a researcher in Braskem S.A. since 2018, where he works in projects related to polyolefins, formulations, processing and crosslinked systems. He is finishing his M.Sc. studies in Materials Science and Engineering under the supervision of prof. Ph.D. Benjamim de Melo Carvalho at Ponta Grossa State University, studying processing and rheological parameters of polyolefin blends. He currently lives in Porto Alegre, Brazil.