Luis Henrique Alves Cândido

Recycling cycle of materials applied to acrylonitrile-butadiene-styrene / policarbonate blends with styrene-butadiene-styrene copolymer addition

The scope of this research is the recycling of polymers from mobile phones hulls discarded and the performance evaluation when they are submitted to the Recycling Cycle of Materials (RCM). The studied material was the ABS/PC blend in a 70/30 proportion. Different compositions were evaluated adding virgin material, recycled material and using the copolymer SBS as impact modifier. In order to evaluate the properties of materials composition, the samples were characterized by TGA, FTIR, SEM, IZOD impact strength and tensile strength tests. At the first stage, the presented results suggest the composition containing 25% of recycled material and 5% of SBS combines good mechanical performance to the higher content of recycled material and lower content of impact modifier providing major benefits to recycling plans. Five cycles (RCM) were applied in the second stage; they evidenced a decrease trend considering the impact strength. At first and second cycle the impact strength was higher than reference material ...

Design, materiais e sustentabilidade: micronização de produto multi-material visando sua reciclagem

A aplicacao do ecodesign na selecao de materais e de extrema importância. Entretanto, percebe-se uma tendencia contraria a essa pratica, a de utilizacao de diversos materiais em um componente do produto (chamado multi-materiail). Apesar de apresentarem vantagens de fabricacao,a reciclagem dos multi-materiais e complexa devido a dificuldade de separacao dos materiais. Nesse contexto, apresenta-se como hipotese a utilizacao da micronizacao como alternativa para viabilizar o reprocessamento dos multi-materiais. Assim sendo, essa pesquisa buscou analisar a possibilidade de aplicacao da micronizacao na reciclagem de produtos multi-materias co-injetados. Para tanto, o estudo pratico consistiu na micronizacao de escovas de dente multi-materiais e posterior extrusao com polietileno de baixa densidade linear (PEDBL) virgem. Os resultados demonstraram que a micronizacao pode ser utilizada na reciclagem desses produtos, uma vez que o processo analisado se mostrou factivel, utilizando metodos acessiveis. Alem disso, nao houve degradacao do material ao longo do processo, assim como, o mesmo nao danificou os equipamentos.

Development of Junction Elements from Study of the Bionics

The applications of bionic methodology developed by the Laboratory of Design and Material Selection as basis in the creation of junction elements were demonstrated. These elements favor the application of Ecodesign in reference to the effectiveness of product dismount aiming the reduction of ambient impact in all its phases of use. The creation, the development and the confection of new junction elements were described, and case studies of new products developed specifically with this purpose were presented.