Hdpe
Mostrando 1-12 de 94 artigos, teses e dissertações.
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1. Antimicrobial High-Density Polyethylene (HDPE)/ZnO Nanocomposites Obtained by in situ Polymerization
Nanostructured zinc oxide (ZnO) prepared by combustion in solution was used to obtain nanocomposites. The ZnO particles were characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), and scanning electron microscopy (SEM), showing crystallite size of 32 nm and a superficial area of 32.6 m2 g-1. Nanocomposites with 1, 3, and 5 wt.% of ZnO in the
J. Braz. Chem. Soc.. Publicado em: 2020-08
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2. DURABILITY OF HDPE GEOMEMBRANES: AN OVERVIEW
The polymer demand for geotechnical applications has been growing. The geomembrane is a geosynthetic, manufactured, polymeric product and is often specified in environmental projects. Geomembranes started to be used in the 1930s but became more widespread in the 1940s. In the 1970s, geomembranes began to be specified for landfills. Over the past forty years,
Quím. Nova. Publicado em: 2020-05
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3. Preparation of Syntactic Foams made from Green Polyethylene and Glass Microspheres: Morphological and Mechanical Characterization
Polymeric syntactic foams are composites made from the mixture of Hollow Glass Microspheres (HGM) and polymer matrices. One of their main characteristics is their low density and the production of these composites using a matrix derived from renewable sources potentiates their development without neglecting sustainability. In this paper , the properties of H
Mat. Res.. Publicado em: 11/11/2019
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4. Analysis of methodologies for determination of the economic pipe diameter
RESUMO O dimensionamento de sistemas adutores passa, sobretudo, pela determinação de um diâmetro que atenda às necessidades do sistema e acarrete em menores custos anuais de instalação e operação. Dentre as metodologias existentes para determinação do diâmetro econômico, a Fórmula de Bresse ainda é comum entre projetistas. Este trabalho teve co
RBRH. Publicado em: 08/08/2019
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5. Predicting LDPE/HDPE blend composition by CARS-PLS regression and confocal Raman spectroscopy
Abstract Industries and the scientific community currently focus on creating new ways to recycle and to reuse polymer waste that leads to serious socio-environmental risks. However, the quality of recycled polyethylenes depends strongly on their purity degree, but the distinction between Low Density Polyethylene (LDPE) and High Density Polyethylene (HDPE) b
Polímeros. Publicado em: 18/03/2019
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6. Post-harvest conservation of Passiflora alata fruits under ambient and refrigerated condition
Abstract Brazil is the world's largest producer of passion fruit, a perishable fruit with reduced post-harvest shelf life, which limits its commercialization. For sweet passion fruit, Passiflora alata, there is little information about its postharvest conservation and shelf life under different storage conditions. Thus, the objective of the present study wa
Food Sci. Technol. Publicado em: 07/02/2019
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7. USE OF PROTECTION SCREEN IN CONVENTIONAL AVIARIES (CALIFORNIAN TYPE) FOR LAYING HENS
ABSTRACT The objective of this work was to evaluate the thermal environment inside conventional cages for laying hens, with and without the use of protective screens. This research was conducted in two conventional cages (open cage), where each cage had half of its area surrounded by high density polyethylene mesh (HDPE) with a diameter of 2.0 cm, and the ot
Eng. Agríc.. Publicado em: 2019-02
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8. Efecto de la adición de bentonita sobre las propiedades ópticas de diferentes materiales compuestos poliméricos
ABSTRACT In this work, composite materials were obtained by the incorporation of bentonite to biodegradable and synthetic polymeric matrices. Commercial (BE) and natural (BM) bentonite samples were employed, as well as three different polymeric matrices: thermoplastic corn starch (TPS), high density polyethylene (HDPE) and a poly(styrene-b-butadiene-b-styren
Matéria (Rio J.). Publicado em: 19/07/2018
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9. INFLUÊNCIA DA ADIÇÃO DE CASCA DE COCO NAS PROPRIEDADES FÍSICO-MECÂNICAS DE COMPÓSITOS POLÍMERO/MADEIRA
RESUMO Neste estudo, foram produzidos compósitos com três tipos de matriz termoplástica e material celulósico em uma proporção de 40%. As três matrizes termoplásticas foram polietileno de alta densidade (HDPE), polipropileno (PP) e polietileno de baixa densidade (LDPE), e os materiais celulósicos foram farinha de madeira pura (Pinus taeda L) ou uma
Rev. Árvore. Publicado em: 19/04/2018
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10. Effects of Multiple Extrusions on Structure-property Performance of Natural Fiber High-density Polyethylene Biocomposites
Detailed analysis of the effects of multiple extrusions on physical, mechanical, micro-structural as well as dynamic mechanical thermal properties of natural fiber high-density polyethylene (HDPE) composites is reported. Composite materials containing HDPE, wood flour, and Maleic Anhydride polyethylene (MAPE) were manufactured and subjected to a recycling pr
Mat. Res.. Publicado em: 01/02/2018
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11. Effect of PANI on Thermal, Mechanical and Electromagnetic Properties of HDPE/LLDPE/PANI Composites
In this work, polyaniline (PANI) in emeraldine-base form, synthesized by chemical oxidation polymerization, was protonated with hydrochloric acid (HCl). Composites based on high-density polyethylene (HDPE) and linear-low density polyethylene (LLDPE) blends with PANI were prepared in molten condition using a torque rheometer. The effect of compatibilizer agen
Mat. Res.. Publicado em: 11/12/2017
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12. Influence of mixing methods on the properties of high density polyethylene nanocomposites with different carbon nanoparticles
ABSTRACT In this paper, nanocomposites with multiwalled carbon nanotubes (MWCNT) or graphene nanosheets were prepared using a high density polyethylene (HDPE) matrix. Two different processes were employed: a solution method and a melt mixing method. The crystallinity index of the HDPE showed similar levels in nanocomposites after the addition of carbon nanot
Matéria (Rio J.). Publicado em: 02/10/2017