Poly Vinyl Chloride
Mostrando 13-24 de 38 artigos, teses e dissertações.
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13. The effects of weathering exposure on the physical, mechanical, and thermal properties of high-density polyethylene and poly (vinyl chloride)
This paper presents results describing the physical, mechanical, and thermal properties (melt flow index - MFI and oxidative induction time - OIT) of high density polyethylene and poly (vinyl chloride) after weathering exposure (6, 12, 18, and 30 months). The materials exposed were geomembranes of two thicknesses: 1.0 and 2.0 mm (PVC) and 0.8 and 2.5 mm (HDP
Mat. Res.. Publicado em: 20/08/2013
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14. Biodeterioration studies of thermoplastics in nature using indigenous bacterial consortium
Thermoplastics, poly vinyl chloride and low-density polyethylene were treated in the presence of indigenously developed bacterial consortium in laboratory and natural conditions. The consortium was developed using four bacteria, selected on the basis of utilization of PVC as primary carbon source, namely P. otitidis, B. aerius, B. cereus and A. pedis isolate
Braz. arch. biol. technol.. Publicado em: 2013-06
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15. The influence of soil and landfill leachate microorganisms in the degradation of PVC/PCL films cast from DMF
While the use of plastics continues to increase in our daily lives in a growing range products, these materials are very persistent in the environment. The blending of aliphatic polyesters with other thermoplastic polymers is a profitable way of producing materials with changed physical properties and biodegradability, which can facilitate microbial adhesion
Polímeros. Publicado em: 05/06/2012
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16. Numerical simulation of anisotropic polymeric foams
This paper shows in detail the modelling of anisotropic polymeric foam under compression and tension loadings, including discussions on isotropic material models and the entire procedure to calibrate the parameters involved. First, specimens of poly(vinyl chloride) (PVC) foam were investigated through experimental analyses in order to understand the mechanic
Lat. Am. j. solids struct.. Publicado em: 2012-04
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17. Study of an anisotropic polymeric cellular material under compression loading
This paper emphasizes the influence of micro mechanisms of failure of a cellular material on its phenomenological response. Most of the applications of cellular materials comprise a compression loading. Thus, the study focuses on the influence of the anisotropy in the mechanical behavior of cellular material under cyclic compression loadings. For this study,
Materials Research. Publicado em: 27/03/2012
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18. Biodegradation of blend films PVA/PVC, PVA/PCL in soil and soil with landfill leachate
This study investigated the biodegradation of blends films of poly(vinyl alcohol)/poly(vinyl chloride) (PVA/PVC) and poly(vinyl alcohol)/poly(caprolactone) (PVA/PCL) blends films prepared with dimethylformamide under a variety of conditions by respirometry, spectrophotometry (FTIR), scanning electron microscopy (SEM), and contact angle. The films were buried
Brazilian Archives of Biology and Technology. Publicado em: 2011-12
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19. Nanocompósitos de PVC, argila organicamente modificada e óxidos metálicos : estudo do processo de preparação e propriedades de combustão e emissão de fumaça / PVC, organically modified montmorillonite and metallic oxides nanocomposites : evaluation of the preparation process and fire and smoke behavior
Poly(vinyl chloride) (PVC), copper (II), molybdenum and zinc oxides, and organically modified montmorillonite nanocomposites were prepared in a melt blending intercalation process. The morphology of the nanocomposites was evaluated using X-ray diffractometry (XRD) and transmission electron microscopy (TEM), and indirectly by the increment of the Young modulu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/08/2010
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20. Estudo proteômico do efeito da atmosfera modificada na estabilidade da cor e na vida útil da carne suína acondicionada em embalagens de transporte tipo masterpack sob refrigeração / Proteomics study of the effect of modified atmosphere on colour estability and shelf life of pork meat wrapped in masterpack transport packages under refrigeration
The aim of this work was to study the effect of modified atmosphere associated to "masterpack" transport packages in the shelf-life of refrigerated pork meat. Microbiological, physical-chemical, biochemical and visual analyses were made. Pork loin (Longissimus dorsi) cuts placed in trays of expanded polystyrene, covered with poly(vinyl chloride) films were u
Publicado em: 2009
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21. Glass fiber reinforced PVC composites: use of conventional processing techniques currently employed in the Brazilian industry. / Compósitos de PVC reforçados com fibra de vidro: uso de técnicas de processamento convencionais da indústria brasileira.
Este trabalho apresenta o estudo da incorporação de fibra de vidro curta em composto rígido de poli(cloreto de vinila) - PVC - por meio de equipamentos e técnicas de processamento convencionais da indústria brasileira. Foram avaliadas as influências de: a) tamanho de fibra de vidro (tipo E), b) dosagem de fibra de vidro, c) dosagem de dióxido de titâ
Publicado em: 2008
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22. Estudo das caracteristicas de inflamabilidade de polimeros utilizados na construção civil e industria de transportes / Study of flammability characteristics of polymers used in buildings and automobile industry
The polymer materials are being used in several applications. The great number of existent monomers, as well as the possibility of copolymers synthesis, polymeric alloys formulation and the composites and nanocomposites show that it is possible to obtain materials with different specific properties and for being used in different application areas. However,
Publicado em: 2008
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23. Performance evaluation of divergent sizing cylinders equipment in several configurations for "Carmen" tomatoes / Avaliação do desempenho de classificadora de cilindros divergentes em varias configurações para toma "Carmen"
Size standards guarantee the same classification for producers, wholesalers and consumers, facilitating trade, enhancing products value and reducing losses. The main goal of this work was to evaluate a grading system of fresh tomatoes by rotating divergent cylinders. The evaluated cylinders were: cylinder with bristles of Polyethylene Terephthalate (PET); sm
Publicado em: 2008
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24. Migração de plastificantes e avaliação de propriedades mecânicas de filmes de poli(cloreto de vinila) para alimentos / Migration of plasticizers and evaluation on mechanical properties in poly(vinyl chloride) film into foods
The migration of packaging compounds can compromise the chemical and mechanical proprieties of the material, as well as causing toxicological problems with the consumer. The purpose of this work was to evaluate migration of plasticizers di-(2-ethylhexyl)phthalate (DEHP), di-(2-ethylhexyl)adipate (DEHA) and acetyl tributyl citrate (ATBC) used to produce poly(
Publicado em: 2007