Synthesis and Characterization of Composites of Polyuthanes Obtained with Soybean Polyol/ TDI/ Minerals Fillers

Abstract

Abstract:In this work we studied the preparation and characterization of composite rigid elastomeric polyurethanes. Thermal, mechanical and microscopic properties of these materials were evaluated by TGA, DMA, hardness and SEM-EDS. In the synthesis of the composite was made a comparative study using waste from natural clays extraction process from the Campo do Tenente (CT), regions Rio do Rastro (RR) and Pitanga (Pit) municipalities of the state of Paraná and the commercial silica. The results showed that the thermal and mechanical properties of the composites did not increase when compared to the polymer. Demonstrating that the loads used showed no characteristic of reinforcing fillers, this behavior may be due to its chemical composition, dominated by oxides and hydroxyls metals.Keywords: Polyol-soybean; composites; mineral fillers. ResumoNeste trabalho foi estudada a preparação e a caracterização de compósitos de poliuretanas elastoméricas rígidas. As propriedades térmicas, mecânicas e microscópicas destes materiais foram avaliadas através de TGA, DMA, dureza e MEV-EDS. Na síntese dos compósitos foi feito um estudo comparativo utilizando resíduos do processo de extração de argilas naturais provenientes das regiões de Campo do Tenente (CT), Rio do Rastro (RR) e Pitanga (Pit) municípios brasileiros do estado do Paraná e a sílica comercial. Os resultados evidenciaram que as propriedades térmicas e mecânicas dos compósitos não aumentaram quando comparadas ao polímero. Demostrando que as cargas utilizadas não apresentaram característica de cargas reforçantes, este comportamento pode ser devido a sua composição química, onde predominam os óxidos e hidroxilas de metais.Palavras-chave: Poliol-soja; compósitos; cargas minerais.

The Usage of the Acai Stone as Reinforcement for the Modeling of Plant Polyurethane Matrix Composite Material

“…A current trend is the use of chemical raw material based on vegetable oil, which involves the valorization of natural polyol oils (RAQUEZ et al, 2010), which contains hydroxyl groups in the chemical structure as in the case of castor oil, or by insertion of hydroxyl groups on the double bonds of unsaturated oils (COSTA et al, 2017). Due to these issues, there is much debate about the use of castor-based polyol for biodegradable composites, which are formed by loading naturally occurring substances such as acai seed and fi ber.…”