Identificação de polietileno em diferentes amostras de polipropileno reciclado

Abstract

Polymers are being seen as villains due to environmental issues and nowadays this theme is quite understandable by the media, generating an awareness of the need for technicians who work in the field of polymers to generate alternatives to minimize the environmental impact. The recycling and reuse of polymeric materials has some technical barriers to enable the commercial use of recycled polymers. One of the barriers that hinder the industrial use of recycled polymers is the difficulty in separating and identifying polymers by collectors and companies in the field. Thus, this work is proposing a methodology for identifying polyethylene contaminants in recycled polypropylene. The proposed method is an infrared method, associated with DSC analysis, mechanical characterization and thermal analysis. In this Woek, PP/PE blends with PE contents of 10%, 20%, 30% and 40% Were processed. From These blends, a calibration curve was set up via infrared, where the adjustment coefficient was 0,994. The recycled PP samples PPCOLETED and PCRWISE Were analyzed. The characterization of the PPCOLETED sample DSC identified the presence of PE and analysis via infrared identified 20% of PE. Characterization of the PCRWISE sample via DSC identified the presence of PE and infrared analysis identified 30% of PE. From the thermal and mechanical analyses, it was possible to coclude that the base PP of the base PP of the PP COLETED sample is a copolymer PP and of the PCRWISE sample is a homopolymer PP. [resumo fornecido pelo autor]