Poly Ethylene Terephthalate
Mostrando 13-24 de 39 artigos, teses e dissertações.
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13. Solid state polymerization of pet/pc extruded blend: effect of reaction temperature on thermal, morphological and viscosity properties
A systematic study of solid state polymerization (SSP), concerning the melt extruded blend of poly(ethylene terephthalate)/polycarbonate (catalyzed PET/PC, 80/20 wt %), as a function of temperature range (180-190°C) for a fixed time (6 h) is presented. The materials obtained were evaluated by differential scanning calorimetry (DSC), thermogravimetry/derivat
Polímeros. Publicado em: 2014-08
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14. Chain extension of poly (ethylene terephthalate) by reactive extrusion with secondary stabilizer
Poly(ethylene tereftalate) (PET) is a polymer highly susceptible to the hydrolytic reactions that occur during applications and mainly in thermomechanical processing. These reactions lead to the decrease of molecular weight of the polymer, limiting the recycling number of the material. The reactive extrusion of the PET in presence of chain extenders is an al
Materials Research. Publicado em: 07/06/2012
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15. Análise técnica do uso de resíduos de poli (tereftalato de etileno) (PET) na indústria têxtil / Analysis technique of using residues polyethylene terephthalate (PET) in the textile industry
O aumento no volume de rejeitos industriais e a contínua produção de resíduos de naturezas diversas causam muitas preocupações no âmbito ambiental. Neste contexto, o descarte de embalagens e garrafas de poli(tereftalato de etileno) (PET) tem se tornado um grande problema por conta da pequena atenção que se dá à sua destinação final. Assim sendo,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2011
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16. Alternativas para o Reaproveitamento de Rejeitos Industriais de Poli(tereftalato de etileno) Reciclado / Alternatives for recycling of industrial wastes of recycled poly (ethylene terephthalate)
The production of nonwoven fabrics (NWF) by extrusion process from recycled poly(ethylene terephthalate) (PET) is an interesting way for polymer recycling used by industry which to allow conciliate economic viability with environmental benefits. However, during extrusion step, a fraction of material is lost due to equipment clogging or others factors, leadin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/07/2010
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17. Miscibility influence in the thermal stability and kinetic parameters of poly (3-hydroxybutyrate)/poly (ethylene terephthalate) sulphonated blends
The thermal degradation of miscible and immiscible poly (3-hidroxy butyrate) PHB/ poly (ethylene terephthalate) sulphonated (PETs) blends was investigated using thermogravimetric analyses. Model-free kinetic analysis, Vyazovkin and Flynn-Wall-Ozawa's methods, were used to determine the apparent activation energy in the whole interval of degradation of the pu
Polímeros. Publicado em: 11/06/2010
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18. Nanocompósitos poliméricos de poli (tereftalato de butileno) - PBT. / Polymer nanocomposites of poly (butylene terephthalate) - PBT.
In this work, nanocomposites of PBT, poly (butylene terephthalate) and Brazilian clay montmorillonite (MMT) organically modified were obtained with and without further addition of toughening agent. Quaternary ammonium and phosphonium salts with different chemical structures were used to organically modify the clays. PBT nanocomposites with commercial organoc
Publicado em: 2010
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19. Wear, friction, and microhardness of a thermal sprayed PET: poly (ethylene terephthalate) coating
The effects of combustion thermal spraying parameters namely combustion pressure, feeding rate, and carrier gas on the wear resistance, friction coefficient, and Knoop hardness of poly (ethylene terephthalate) (PET) films were investigated. The PET coatings were characterized by measuring the wear coefficients by calowear-type testing, the friction coefficie
Materials Research. Publicado em: 2009-06
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20. Methodology to detect the presence of recyled PET in PET food package / Metodologia para detectar a presença do PET reciclado em embalagens PET para alimentos
Recently, Brazil recorded mechanical recycling of the poly (ethylene terepththalate), PET, the highest in the world, corresponding to about 53 wt %. This success in the recycling industry is due to the wide range of its applications, from textiles to packaging for the food industry. The recycled food-grade packaging could be mixed with virgin resin and repro
Publicado em: 2009
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21. Resíduos de poli (tereftalato de etileno) e de pneu na confecção de pisos flutuantes para o isolamento do ruído de impacto / Poly (ethylene-terephthalate) and tyre residues in floating floors for impact sound insulation
O crescimento demográfico mundial tem criado um aumento na geração de resíduos sólidos urbanos e deteriorado a qualidade de vida dos cidadãos. As edificações altas se apresentam como a principal forma de acomodação da crescente população nas cidades, no entanto, o conforto sonoro em relação ao ruído de impacto tem se mostrado precário. Com o
Publicado em: 2009
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22. Resíduos de poli (tereftalato de etileno) e de pneu na confecção de pisos flutuantes para o isolamento do ruído de impacto / Poly (ethylene-terephthalate) and tyre residues in floating floors for impact sound insulation
O crescimento demográfico mundial tem criado um aumento na geração de resíduos sólidos urbanos e deteriorado a qualidade de vida dos cidadãos. As edificações altas se apresentam como a principal forma de acomodação da crescente população nas cidades, no entanto, o conforto sonoro em relação ao ruído de impacto tem se mostrado precário. Com o
Publicado em: 2009
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23. Multilayer radar absorbing material processing by using polymeric nonwoven and conducting polymer
This study shows the processing of radar absorbing multilayer structures based on nonwoven substrates of polyacrylonitrile and poly (ethylene terephthalate) impregnated with a polyaniline and polyurethane mixture. Processed materials with different parameters - layer stacking and impregnated faces - were evaluated considering the incident radiation attenuati
Materials Research. Publicado em: 2008-09
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24. Estudo da viabilidade da aplicação de PET reciclado como agente de contenção de areia em poços de petróleo / Study of the viability of the application of recycled PET as sand control agent in oil wells
This work analyses the viability of applying recycled poly(ethylene terephthalate), PET, as sand control agent, using virgin PET and poly(methylene oxide), POM, for comparison means. The polymer samples were characterized by carbon-13 magnetic nuclear resonance (13C-NMR), differential scanning calorimetry (DSC), thermal gravimetric analysis (TG), scanning el
Publicado em: 2008