MARIANA DO NASCIMENTO SARTORI
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Artigo IPEN-doc 26657 Effects of gamma radiation on the properties of the thermoplastic starch/poly (butylene adipate-co-terephthalate) blends2019 - CASTRO, DIONE P. de; SARTORI, MARIANA do N.; SILVA, LEONARDO G. de A. eThe development of blends made from matrices of synthetic biodegradable polymers, and natural additives, are considered less environmentally aggressive materials. This work aimed to study the effects of gamma radiation on the properties of the thermoplastic starch (TPS)/poly(butylene adipateco- terephthalate) (PBAT). In this work, blends of TPS/PBAT were prepared with glycerol, castor oil and TWEEN® 80, which were prepared by extrusion and then subjected to the radiation process and characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results demonstrated increased thermal degradation for the F2 (composed by OM) and F3 (composed by OM and TWEEN® 80) regarding F0 (composed by glycerol) e F1 (composed by glycerol and TWEEN® 80) blends. A good blend component chemical interaction and partial miscibility for the blends F0 and F1 was observed and compared to the others. However, F2 and F3 blends did not present co-continuous phases; being that the XRD curve patterns were not altered by the gamma radiation. The tests performed demonstrated that the irradiated and non-irradiated samples did not have their properties significantly altered. Thus, it was concluded that it is feasible to replace castor oi l with glycerol in TPS/PBAT blends.Artigo IPEN-doc 23863 Preparation and characterization of PBT/clay nanocomposite2012 - SARTORI, MARIANA N.; OLIVEIRA, RENE R.; DIAZ, FRANCISCO R.V.; ORTIZ, ANGEL V.; RANGARI, VIJAYA K.; MOURA, ESPERIDIANA A.B.This work presents the preparation and characterization of a nanocomposite based on Poly(butylene terephthalate) PBT and Brazilian smectitic clay (bentonite chocolate clay). Before being incorporated as clay nanoparticles in PBT resin, the clay was organically modified by the addition of a quaternary salt and sodium carbonate. PBT/Clay nanocomposite (96.3:3.70 wt %) was obtained by using a twin-screw extruder machine. After extrusion process, the nanocomposite was characterized by tensile, flexural and impact tests, SEM, Vicat, HDT, DSC, TGA and XRD tests. The results showed that the properties of the nanocomposite obtained were superior to those of neat PBT. Concerning the temperature of thermal distortion (HDT) an expressive gain of around 45 % was presented to PBT/Clay nanocomposite compared to PBT evidencing the interaction of nanofiller with the polymeric matrix.Artigo IPEN-doc 20804 PBT/Brazilian clay nanocomposites prepared by melt intercalation: effects of organophilic clay content and ionizing radiation treatment2014 - SARTORI, MARIANA N.; FERREIRA, MAIARA S.; VALENZUELA-DIAZ, FRANCISCO R.; RANGARI, VIJAYA K.; JEELANI, SHAIK; MOURA, ESPERIDIANA A.B.Artigo IPEN-doc 19497 Effects of electron-beam irradiation on HDPE/Brazil nut shell fiber composite2013 - FERREIRA, MAIARA S.; SARTORI, MARIANA N.; OLIVEIRA, RENE R.; MOURA, ESPERIDIANA A.B.Artigo IPEN-doc 16849 Studies of thermo-mechanical properties of PBT/clay nanocomposite treated by electron-beam radiation2011 - SARTORI, MARIANA N.; NOGUEIRA, BEATRIZ R.; DIAZ, FRANCISCO R.V.; MOURA, ESPERIDIANA A.Artigo IPEN-doc 20108 Short vegetal-fiber reinforced HDPE - A study of electron-beam radiation treatment effects on mechanical and morphological properties2014 - FERREIRA, MAIARA S.; SARTORI, MARIANA N.; OLIVEIRA, RENE R.; GOUVEN, OLGUN; MOURA, ESPERIDIANA A.B.