ACOUSTICAL ABSORBERS MADE FROM FOAM POLYURETHANES AND WASTE TIRES PARTICLES

GUILLERMO SOTO; NILDA VECHIATTI; FEDERICO IASI; ALEJANDRO ARMAS; NORMA E. MARCOVICH; MIRNA A. MOSIEWICKI

Mar del Plata

Simposio; XVI Simposio Latinoamericano de Polímeros, XIV Congreso Iberoamericano de Polímeros; 2018

In this work, hydroxylated methyl esters and glycerol were obtained, respectively, as main and by-product of the chemical modification of tung oil, following a two-step procedure. First, fatty acid methyl esters and glycerol (GLY) were obtained by means of alkaline transesterification. Then, the resultant fatty acid methyl esters were modified by hydroxylation with performic acid generated in situ. In this way, hydroxyl groups (-OH) were added to the carbon chain, resulting in hydroxylated methyl esters derived from tung oil (HMETO). Both (HMETO and GLY) are multi-functional polyols that can be used to tailor the cross-linking density and, consequently, the morphological, physical, mechanical and acoustic properties of the FPFs [5]. Thus, the aim of this work was to modify a FPF formulation based on a commercial polyether polyol and a polyisocyanate by replacing part of the former constituent by tung oil derived polyols. Furthermore, the foams were modified by the addition of waste tire particles (WTP) as filler of poor thermal and acoustic conduction. The effects of these changes on the physical, mechanical and acoustic properties of the resulting foams were evaluated.