ELISABETH CARVALHO L. CARDOSO
6 resultados
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Resumo IPEN-doc 18742 Biodegradability of PP/HMSPP and natural and synthetic polymers blends in function of gamma irradiation degradation2012 - CARDOSO, ELISABETH C.L.; SCAGLIUSI, SANDRA R.; LIMA, LUIS F.C.P.; BUENO, NELSON R.; BRANT, ANTONIO J.C.; PARRA, DUCLERC F.; LUGAO, ADEMAR B.Artigo IPEN-doc 19250 Biodegradability and mechanical properties of PP/HMSPP and natural polymers bio-composites in function of gamma-irradiations2013 - CARDOSO, ELISABETH C.L.; SCAGLIUSI, SANDRA R.; LIMA, LUIS F.C.P.; BUENO, NELSON R.; PARRA, DUCLERC F.; LUGAO, ADEMAR B.Artigo IPEN-doc 14224 A influencia do metodo de preparacao de especimes na avaliacao da morfologia celular de espumas de polipropileno2009 - CARDOSO, ELISABETH C.L.; LIMA, LUIS F.C.P.; PARRA, DUCLERC F.; LUGAO, ADEMAR B.; BUENO, N.R.; GASPARIN, ELEOSMARArtigo IPEN-doc 16890 Estudo da processabilidade de polietileno de baixa densidade (LDPE) gama irradiado para a produção de espumas2011 - CARDOSO, ELISABETH C.L.; SCAGLIUSI, SANDRA R.; BUENO, NELSON R.; GASPARIN, ELIOSMAR S.; ONO, LILIAN S.; MORAIS, GUILHERME F.; PARRA, D.F.; LUGAO, ADEMAR B.Artigo IPEN-doc 15193 Sterilized PP/HMSPP cushion foams for medical and food packaging applications2009 - CARDOSO, ELISABETH C.L.; LIMA, LUIS F.C.P.; PARRA, DUCLERC F.; LUGAO, ADEMAR B.; BUENO, N.R.; GASPARIN, ELEOSMARArtigo IPEN-doc 19109 Biodegradability of PP/HMSPP and natural and synthetic polymers blends in function of gamma irradiation degradation2014 - CARDOSO, ELISABETH C.L.; SCAGLIUSI, SANDRA R.; LIMA, LUIS F.C.P.; BUENO, NELSON R.; BRANT, ANTONIO J.C.; PARRA, DUCLERC F.; LUGAO, ADEMAR B.Polymers are used for numerous applications in different industrial segments, generating enormous quantities of discarding in the environment. Polymeric materials composites account for an estimated from 20-30% total volume of solid waste. Polypropylene (PP) undergoes crosslinking and extensive main chain scissions when submitted to ionizing irradiation; as one of the most widely used linear hydrocarbon polymers, PP, made from cheap petrochemical feed stocks, shows easy processing leading it to a comprehensive list of finished products. Consequently, there is accumulation in the environment, at 25 million tons per year rate, since polymeric products are not easily consumed by microorganisms. PP polymers are very bioresistant due to involvement of only carbon atoms in main chain with no hydrolysable functional group. Several possibilities have been considered to minimize the environmental impact caused by non-degradable plastics, subjecting them to: physical, chemical and biological degradation or combination of all these due to the presence of moisture, air, temperature, light, high energy radiation or microorganisms. There are three main classes of biodegradable polymers: synthetic polymers, natural polymers and blends of polymers in which one or more components are readily consumed by microorganisms. This work aims to biodegradability investigation of a PP/HMSPP (High Melt Strength Polypropylene) blended with sugarcane bagasse, PHB (Polyhydroxy-butyrate) and PLA (Poly-Lactic Acid), both synthetic polymers, at a 10% level, subjected to gamma radiation at 50, 100, 150 and 200 kGy doses. Characterization will comprise IR, DSC, TGA, OIT and Laboratory Soil Burial Test (LSBT).