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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Obten??o de blendas polim?ricas a partir da reciclagem de sucatas de aparelhos celulares e polietileno de baixa densidade reciclado / Obtaining polymer blends from the recycling of scrap from cell phones and low density recycled polyethylene

Santos, C?ssia Thais Silva 20 July 2016 (has links)
Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2017-06-06T11:42:39Z No. of bitstreams: 1 2016 - C?ssia Thais Silva Santos.pdf: 4767415 bytes, checksum: 7078f4a6b3c6455dd65b9fa432b3a6ff (MD5) / Made available in DSpace on 2017-06-06T11:42:39Z (GMT). No. of bitstreams: 1 2016 - C?ssia Thais Silva Santos.pdf: 4767415 bytes, checksum: 7078f4a6b3c6455dd65b9fa432b3a6ff (MD5) Previous issue date: 2016-07-20 / It is crescent the research by new materials and methods for creating and same market insertion. Currently, among the various types of waste, electronic waste is considered obsolete in a very short time and require proper disposal. In Brazil, the last year, the reuse of plastic materials has increased. This study aimed to research the importance of mobile phones waste recycling, which have short pace of useful life used as reinforcements, no development of new materials containing recycled thermoplastic polymer (Low Density Polyethylene LDPE) and from the analyzes mechanical and dangerousness of these new materials, so justify the replacement of the importance of some materials with longer life time and easy recyclability, that form provides a reduction of environmental impacts caused by the generated waste were developed six blends of (Low Density Polyethylene recycled and PCABS carcasses - LDPErec/PC-ABS), with composition and grain size variation of cell granulometry housing and also an analysis of pure materials. The results obtained for analysis of diffraction X-ray, density, water absorption, hardness, scanning electronic microscopy and mechanical testing showed one low interaction between polymers, beyond the performance of the amorphous polymer morphology and hence the crystallinity mix, directly affected at the thermal and mechanical properties. As for the hazard analysis of the materials developed, they were not found excess levels of metal toxicants, the limits established by ABNT NBR 10004 / ? crescente a pesquisa por novos materiais e metodologias para a cria??o e inser??o dos mesmos no mercado. Atualmente, dentre os diversos tipos de res?duos, os res?duos eletroeletr?nicos tem aumentado exponencialmente, pois estes tem sido considerados obsoletos em um intervalo de tempo muito curto e necessitam de descarte adequado. No Brasil, nos ?ltimos anos, o reaproveitamento de materiais pl?sticos tamb?m tem aumentado. Neste contexto, este trabalho teve como objetivo pesquisar a import?ncia da reciclagem de res?duos de telefones celulares (carca?as), que possuem curto tempo de vida ?til, utilizados como refor?os, no desenvolvimento de novos materiais, contendo pol?mero termopl?stico reciclado (polietileno de baixa densidade ? PEBD) e, a partir das an?lises mec?nicas e da periculosidade destes novos materiais, justificar a import?ncia da substitui??o de alguns materiais por outros com maior tempo de vida ?til e de f?cil reciclabilidade, de forma que proporcione a redu??o dos impactos ambientais provocados com os res?duos gerados. Para tal, foram desenvolvidas 6 blendas de (Polietileno de baixa densidade reciclado e carca?as de PC-ABS - PEBDrec/PC-ABS), com varia??o da composi??o e granulometria das carca?as de aparelhos celular, e tamb?m a an?lise dos mat?rias puros. Os resultados obtidos pelas an?lises de difra??o de raios-X, densidade, absor??o de ?gua, dureza, microscopia eletr?nica de varredura e ensaios mec?nicos mostraram que a baixa intera??o entre os pol?meros, al?m da atua??o do pol?mero amorfo na morfologia e, consequentemente, na cristalinidade da mistura, afetou diretamente nas propriedades t?rmicas e mec?nicas. Quanto ? an?lise de periculosidade dos materiais desenvolvidos, n?o foram encontrados n?veis excedentes de metais t?xicos, conforme limites estabelecidos pela NBR ABNT 10004.

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