Blending of biodegradable polymers in combination with low-price organic fillers has proven to be a suitable approach produce cost-effective composites order address pollution issues and develop products superior mechanical properties. In the present research work PBAT/PHB/Babassu 25, 50, 75% each polymer 20% Babassu were produced by melting extrusion. Their thermal, mechanical, morphological behavior was investigated differential scanning calorimetry (DSC), tensile testing, electron...

Photodegradation of PCL was performed exposing injected specimens to ultraviolet radiation (UV-B) up 9 weeks. Photodegradated were tested by Differential Scanning Calorimetry (DSC), Infrared Spectroscopy (FTIR), mechanical properties, Optical Microscopy (MO) and Electron (SEM).Upon exposure decrease in elongation at break increase elastic modulus verified, higher degree crystallinity observed for longer what can be due the chemi-crystallization mechanism. From IR spectra new carbonyl group...

Poly(Ɛ-caprolactone)/montmorillonite (PCL/MMT) and Poly(Ɛ-caprolactone)/organo-modified montmorillonite (PCL/OMMT) compounds at 3% w/w clay content were prepared by melting mixing. The effect of MMT OMMT on the degradability PCL injected specimens was investigated in vacuum 40oC for up to 45 days aqueous medium days. Selected collected after 15, 30 exposure. Microstructural changes monitored during degradation experiment means melt flow rate (MFR), weight loss, X ray diffraction (XRD),...

The vulcanized rubber waste from the shoe industry causes environmental damage when it is incinerated or inappropriately discarded, turning this into a problem of major concern. Therefore, study had as main objective Polystyrene (PS) toughening using different contents white styrene-butadiene (SBRr) produced in industry. mixtures were initially prepared co-rotational double screw extruder and, thereafter, extruded granules injection molded. Analyzed rheological, mechanical, thermomechanical...

In this work, blends based on environmentally friend polymers such as Biopolyethylene (Bio-PE), Polycaprolactone (PCL) and Polyethylene graft maleic anhydride (PEgMA) added compatibilizer agent were produced by conventional extrusion, aiming to produce bio-blends with synergic properties at low processing cost, being same time non-polluting therefore contributing the environment preservation. Differential scanning calorimetry (DSC) showed that blending does not significantly interfere...

Abstract Low‐density biopolyethylene (BioLDPE) ecocomposites added with particles of eggshell (ES) residue were produced using linear low‐density polyethylene grafted maleic anhydride (LDPE‐g‐MA) as a compatibilizing agent. BioLDPE/ES and BioLDPE/ES/LDPE‐g‐MA compounds processed in twin‐screw extruder, the specimens injection molded. Torque rheometry increased melt flow index reduced more prominently for BioLDPE/LDPE‐g‐MA biocomposite 20 phr ES, suggesting higher viscosity. Consequently,...

The impact of adding 1%, 3%, and 5% by mass kaolin residue (KR) was investigated regarding the mechanical, thermomechanical, morphological properties, as well non-isothermal crystallization melting kinetics poly(ε-caprolactone) (PCL). processing to obtain PCL/KR composites carried out through extrusion in a twin-screw extruder, followed injection molding. This study events first melting, fusion crystallization, second using differential scanning calorimetry (DSC), with heating rates ranging...

Maleic anhydride grafted poly(ε-caprolactone) (PCL-g-MA) was prepared by grafting MA on PCL using an internal mixer and reactive extrusion dycumil peroxide (DCP) as initiator. Experimental design 23 used with the purpose of evaluating most efficient reaction condition at higher reliability for grafting. degradation assessed intrinsic viscosity size exclusion chromatography (SEC), percentage reacted maleic (%g-MA) measured titration. Results PCL-g-MA were also characterized Fourier Transform...

Biodegradable compounds of poly(ε-caprolactone) (PCL)/ cotton linter were melting mixed with filling content ranging from 1% to 5% w/w. Cotton is an important byproduct textile industry; in this work it was used raw state and after acid hydrolysis. According the results torque rheometry no decaying viscosity took place during compounding, evidencing absence breaking down molecular weight. The thermal stability increased by 20% as observed HDT for PCL/cotton nanolinter compounds. Adding PCL...

Researches of polymer blends based on biological and biodegradable polymers appear as a viable alternative to develop environmentally friendly materials. Therefore, the aim this research was produce compounds made with polyethylene, i.e., Biopolyethylene, Bio-PE, added Polycaprolactone (PCL) functionalized by copolymer polyethylene grafted acrylic acid (PEgAA), obtain better mechanical properties toughen Bio-PE. Compounds were processed in co-rotating twin screw extruder sample tests...

Resumo: A mistura de polímeros diferentes possibilita a obtenção novos materiais com propriedades, na maioria das vezes superiores às dos componentes puros.Essa vem sendo utilizada e aplicada membranas intuito melhorar as propriedades barreira para que se possa separar duas fases restringindo total ou parcialmente o transporte uma várias espécies químicas presentes.Neste trabalho, poliméricas foram obtidas partir blendas poliamida 6 (PA6), polipropileno (PP) compatibilizantes pelo método...

Abstract Blends of poly(lactic acid) (PLA)/poly(butylene adipate‐ co ‐terephthalate) grafted with glycidyl methacrylate (PBAT‐ g ‐GMA) were developed to produce flat and flexible biofilms through extrusion. The PLA/PBAT‐ ‐GMA (90%/10%, 80%/20%, 70%/30%, 60%/40% by mass) blends processed in the internal mixer, injection molded, manufactured into films. optimal composition was (60/40%), as it demonstrated a decrease elastic modulus 53.2% significant gain elongation at break 4923% about pure...

RESUMO O reômetro de torque é um equipamento que reproduz em escala laboratorial o processamento polímeros. Neste equipamento, a velocidade rotação dos rotores, temperatura e tempo são parâmetros predeterminados impostos ao sistema investigado; avalia-se necessário para fusão, mistura homogeneização da amostra. Através do gráfico função processamento, cujos valores estão relacionados com as propriedades reológicas, estrutura massa molar das amostras, possível obter informações sobre...

In this work, compounds based on two grades of polypropylene (PP), i.e., PP H503 or H103 with residues Big bag fabrics (RBB) were processed in a corrotational twin screw extruder RBB content ranging from 10% to 50% the weight. Then, their thermal properties investigated through Differential Scanning Calorimetry (DSC) and Thermogravimetry (TG); mechanical by tensile impact; thermomechanic heat deflection temperature (HDT); morphology Electron Microscopy (SEM). With aim add maximum without...

In this work, the copolymers ethylene-glycidyl methacrylate (E-GMA), ethylene methyl methacrylate-glycidyl (EMA-GMA), and styrene-(ethylene-butylene)-styrene grafted with maleic anhydride (SEBS-g-MA) were used to compatibilize polystyrene (PS)/poly(caprolactone) (PCL) blends. The blends processed in a co-rotating twin-screw extruder injection molded. Samples investigated by torque rheometry, capillary impact strength, tensile heat deflection temperature (HDT), dynamic-mechanical thermal...

Poly(lactic acid) (PLA) is one of the most important ecological thermoplastics due to its good mechanical properties. In light this, investigations related effects PLA processing parameters are as they affect final product performance. This work aimed determine viscosity-temperature coefficient (β) and pseudoplastic index (n) estimate degradation rate during using an internal mixer. The viscosity was determined applying different temperatures at same rotors rotation rate, which allowed...

This work investigated the effect of hydrolytic degradation on mechanical properties in tension and impact strength poly (Ɛ-caprolactone) (PCL). PCL specimens produced by injection processing were submersed water exposed at 40°C into a vacuum heater. The collected from heater after periods 15, 30 45 days, respectively, followed tests. According to data acquired for Elastic Modulus, 15 days presented decrease 9.65% 13.65%; Yield Stress 9.08% 10.38% was observed same period time compared with...

Polymer blend is the name for physical mixture of two or more polymers and/or copolymers, and this allows obtention new materials with superior properties to those pure components. The blends have been used in obtaining membranes order improve barrier so that it can separate phases totally partially, restricting transport one chemical species. In work, polymer were obtained from PA6/PPgAA PA6/PP/PPgAA by phase inversion method studied scanning electron microscopy (SEM) X-ray diffraction...

Abstract Blends of polyamide 6 (PA6) and polyethylene‐grafted acrylic acid (PE‐g‐AA) in contents 90/10, 80/20, 70/30 were processed a torque rheometer. Fourier transform infrared spectroscopy spectra showed secondary hydrogen bond interactions between COOH NCOH groups. Addition PE‐g‐AA did not promote significant changes the thermal stability blends, as evidenced curves thermogravimetric plots, which weight loss single stage for PA6 PE‐g‐AA, with T 0.01 343 409°C, predominant release CO 2 ,...

Styrene–butadiene rubber (SBR) waste from the shoe industry was repurposed to produce polypropylene (PP)-based compounds, with aim of evaluating their antistatic potential. Styrene–ethylene–propylene (SEP) added as a compatibilizing agent, while carbon nanotubes (MWCNT) were incorporated conductive nanofiller. The polymer compounds processed in an internal mixer, and injection molded. properties evaluated included torque rheometry, melt flow index (MFI), impact strength, tensile Shore D...

A educação à distância (EaD) assume um papel transformador na esfera educacional, possibilitando a disseminação de oportunidades aprendizado alta qualidade para público diversificado e global. Este artigo revisão se concentra crescente relevância da tecnologia assistiva EaD, com enfoque específico área técnica profissionalizante, realçando sua capacidade promover inclusão acessibilidade no ensino aprendizagem. compreende ferramentas dispositivos desenvolvidos apoiar indivíduos deficiências,...

Abstract This work aimed analyzing the chemical and thermal aspects of Polylactic Acid (PLA) composites with Coconut Fiber (CF) irradiated (CFI), upon castor oil (CO) addition. Influence treated untreated CF, at 10 20 wt.%, on crystallization kinetics PLA/CO is also investigated. At first, CF chemically through mercerization under NaOH solution subsequent gamma irradiation. Chemical changes include absence bands ≈3300 cm −1 presence vibrations 3000–2851 in fibers, as evidenced by fourier...