Polymeric materials are greatly used in industry due to their versatility in application generating therefore, large quantities of solid waste. Population growth in urban areas, with living quarters mainly in residential buildings, face discomfort caused by noise, particularly by impact noise. Aiming at reducing the amount of polymeric material disposed of in the environment and at providing alternatives of reuse, together with the possibility of reducing noise impact from construction works, agglomerates of polyurethane skin (PUs) have been developed. The recycling process of PUs was developed through variations in particle size and pressing temperature of agglomerates. PU agglomerates of coarse particle size, hot pressing process and close cell structure presented reductions in noise level up to 20 dB, showing that it is suitable for acoustic insulation.
ResumoO presente trabalho tem como objetivo a reutilização de resíduos de poliuretano rígido na elaboração de compósitos com a adição de fibras de bananeira e de celulose visando a qualificação do desempenho acústico, do isolamento térmico e da reação ao fogo do material com adição de 7% de polisulfona. Aglomerados com 100% de poliuretano e com adição de 20% de fibras de bananeira e ou 20% de celulose foram caracterizados na perda de transmissão sonora e condutividade térmica e a reação ao fogo levando em consideração as variações na granulometria dos sólidos de poliuretano e o tipo de prensagem. Os compósitos com fibras naturais apresentaram menor condutividade térmica, maior isolamento acústico nas médias frequências e a adição de polisulfona retardou o tempo total de queima do material. Palavras-chavePoliuretano, fibras naturais, isolamento de edifícios, reação ao fogo.Fire response, thermal insulation and acoustic performance of rigid polyurethane agglomerates with addition of natural fiber AbstractThis paper aims to reuse rigid polyurethane waste in the preparation of composites with the addition of banana fibers and cellulose in order to qualify the acoustic performance, thermal insulation and reaction to fire the material with the addition of 7% of polysulfone. Agglomerated with 100% of polyurethane and either with 20% of banana fiber or 20% of cellulose were characterized in the sound transmission loss, thermal conductivity and reaction to fire, take into account variations in the granulometry of the solid polyurethane and type of pressing. Natural fiber composites had lower thermal conductivity, higher acoustic insulation in medium frequencies and the addition of polysulfone delayed the total time of firing the material.
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