Abstract:More and more electronic devices are being produced and most of them are disposed of improperly. In addition, as they contain heavy metals and toxic substances in their composition, the environmental impact increases. This work aims to study the recycling of polymers present in e-waste through the mechanical characterization of polymer blends produced with the main polymers present in printers. To do so, printers were dismounted, the material of the components was classified, and the main polymers were process… Show more
“…The polystyrenic polymers (PS, ABS, HIPS) were identified based on the specific absorption bands, respectively: 3200-2800 cm -1 -aromatic and aliphatic C-H stretch; 1602 and 1494 cm -1 -aromatic ring; 1452 cm -1 -CH 2 scissoring; 900-966 cm -1 -unsaturated groups from polybutadiene phase; 700-770 cm -1 -aromatic ring or substituted phenyl ring [12].…”
Section: Resultsmentioning
confidence: 99%
“…In the literature, there were reported two ways of reintroducing the polymer components of these recovered materials into the economic circuit: the individual recycling of polymers and their composites, and the collective recycling of these polymeric materials [8][9][10][11][12].…”
Waste electrical and electronic equipment (WEEE) generated in large amounts due to the development of IT and telecommunication industry is considered an important concern for environmental protection. The complex polymer composition of WEEE can be determined in order to consider a proper recycling process for polymeric materials. The aim of the study was to identify the constituent polymers by: density, burning test, solubility, Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), thermo-gravimetric analysis (ATG). The research led to a majority of polystyrenic polymers, together with polyesters, polycarbonates and polyamides.
“…The polystyrenic polymers (PS, ABS, HIPS) were identified based on the specific absorption bands, respectively: 3200-2800 cm -1 -aromatic and aliphatic C-H stretch; 1602 and 1494 cm -1 -aromatic ring; 1452 cm -1 -CH 2 scissoring; 900-966 cm -1 -unsaturated groups from polybutadiene phase; 700-770 cm -1 -aromatic ring or substituted phenyl ring [12].…”
Section: Resultsmentioning
confidence: 99%
“…In the literature, there were reported two ways of reintroducing the polymer components of these recovered materials into the economic circuit: the individual recycling of polymers and their composites, and the collective recycling of these polymeric materials [8][9][10][11][12].…”
Waste electrical and electronic equipment (WEEE) generated in large amounts due to the development of IT and telecommunication industry is considered an important concern for environmental protection. The complex polymer composition of WEEE can be determined in order to consider a proper recycling process for polymeric materials. The aim of the study was to identify the constituent polymers by: density, burning test, solubility, Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), thermo-gravimetric analysis (ATG). The research led to a majority of polystyrenic polymers, together with polyesters, polycarbonates and polyamides.
“…No ano de 2016, a geração global de lixo eletrônico atingiu 44,7 milhões de toneladas, equivalente 6,1 kg por habitante, com previsão de atingir 52,2 milhões de toneladas e 6,8 kg por habitante em 2021 [1]. A reciclagem, por exemplo, da fração de polímeros desse e-waste depende da correta separação na desmontagem bem como do controle do processamento [2].…”
Section: Introductionunclassified
“…Plantas mais desenvolvidas possuem sistemas próprios para coleta e destinação do pó, porém o processo de separação e recuperação de metais valiosos a partir deste pó é mais complexo em relação às partículas de maior granulometria. Considerando-se que apenas uma porcentagem da poeira gerada durante o processamento mecânico de PCIs pode ser reutilizada, sendo a outra parcela descartada em aterros, caracteriza-se então um problema sério na destinação do lixo eletrônico, pois este contém substâncias tóxicas como mercúrio, cádmio e chumbo (SCHNEIDER et al 2018 [2]).…”
RESUMO As placas de circuito impresso (PCIs) são as partes mais valiosas dos resíduos eletrônicos, pois possuem uma considerável quantidade de metais com potencial de recuperação. Processos de reciclagem com o intuito de recuperar metais de PCIs têm despertado interesse ultimamente. Contudo, uma fração destes resíduos não é completamente aproveitada e tem destino incerto, como ocorre para a fração não-metálica e o pó gerados durante os processos de recuperação de metais. O foco deste estudo foi o emprego do pó gerado nos processos de cominuição mecânica, separação granulométrica, magnética e eletrostática de PCIs controladoras e indicadoras de temperatura de câmaras frias, para obter compósitos de matriz de polipropileno (PP) com diferentes teores de pó de PCIs, 5, 10 e 20% em massa. Os materiais foram pesados, misturados, moldados por injeção e posteriormente caracterizados por ensaios de tração, dureza Shore D, espectroscopia de infravermelho, análise termogravimétrica e microscopia eletrônica de varredura. Os resultados dos ensaios de tração e dureza indicaram propriedades levemente superiores às do PP puro, exceto para a deformação na ruptura, que foi reduzido em até 2,7 vezes para a amostra com 20% de resíduo. O desenvolvimento de compósitos utilizando o pó de PCIs se mostrou viável em aplicações onde as propriedades resistência à tração, rigidez e dureza são determinantes, mesmo para um elevado teor de resíduo (20%) agregado.
“…The mechanical recycling in the melt state of binary mixtures (ABS, HIPS) or of the total polystyrene copolymers without additional components leads to materials with modest physical-mechanical properties. These composites are however used in the production of items that do not require special performance properties such as clothes hangers, plates, organizing boxes, water collection tanks [11,12].…”
The high global production of electric and electronic equipment increases in the same manner the amount of the waste that needs to be recycled. Special attention is given to the plastics recycling from the waste in addition to the metals recovery that brings economic advantages. Considering that the plastic amount contains about 80% polystyrene polymers, the paper presents a recycling study of this fraction as reinforcing agent for a styrene-butadiene block copolymer. In order to reduce the melt viscosity, some of the composites were extended with paraffin-naphthenic �heavy white oil�. The blends were characterized by mechanical testing, thermal and dynamo-mechanical analysis. Based on the resulted properties, it can be concluded that the extended and reinforced composites can be used as material for shoe soles.
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