Results 201 to 210 of about 9,059 (236)
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Crystallization of poly(ethylene terephthalate) (PET) from the oriented mesomorphic form
Journal of Applied Polymer Science, 1994AbstractYarns of different inherent viscosities, in the range 0.6–1.1 dL/g, spun in industrial plants, and drawn at room temperature to obtain mesomorphic samples, have been characterized. The evolution from the mesomorphic form toward the triclinic crystalline form has also been studied by combined differential scanning calorimetry (DSC), dynamic ...
L. PARRAVICINI +7 more
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Molar mass of poly (ethylene terephthalate) (PET) during ultimate uniaxial drawing
Polymer Engineering & Science, 2000AbstractThe changes of the average molar mass Mw, Mn, Mz, and molar mass distributions during multistep uniaxial drawing of poly(ethylene terephthalate) (PET) to achieve ultimate mechanical properties have been studied in detail by means of size exclusion chromatography (SEC) with triple detection: concentration, viscosimetry, and light scattering ...
Göschel, U., Cools, P.J.C.H.
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Glycolytic recycle of poly(ethylene terephthalate) (PET)
Makromolekulare Chemie. Macromolecular Symposia, 1992AbstractIn a comparison of PET waste recovery methods, glycolysis to monomer (DHET + low MW oligomers) represents a compromise between regeneration of starting ingredients by methanolysis or hydrolysis and direct remelt extrusion. It is less costly than the former and more versatile than the latter.
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Characterization of virgin and recycled poly(ethylene terephthalate) (PET) fibers
The Journal of The Textile Institute, 2014In this study, we compared the properties of recycled poly(ethylene terephthalate) (PET) fibers and virgin PET fibers. All these experiments present the differences or similarities between them on surface morphology, mechanical properties, and internal fiber structure.
Shan-Shan He +3 more
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Kinetic model for the pyrolysis and combustion of poly-(ethylene terephthalate) (PET)
Journal of Analytical and Applied Pyrolysis, 2001Abstract The kinetics of the global primary thermal decomposition of poly-(ethylene terephthalate) (PET) waste was studied in strict pyrolysis conditions and with different proportions of oxygen by TGA, between temperatures of 25 and 800°C. Prior to the decomposition, the polymer first melts at around 250°C.
I. Martı́n-Gullón +2 more
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Polymer Bulletin, 2018
The esterification step during poly(ethylene terephthalate) (PET) polymerization was studied using ethylene glycol (EG) and terephthalic acid (TPA), together with microwave radiation in a closed system. First, the effects of temperature and molar ratio EG/TPA on the number-average molecular weight (
Ana Christy Espinosa-López +7 more
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The esterification step during poly(ethylene terephthalate) (PET) polymerization was studied using ethylene glycol (EG) and terephthalic acid (TPA), together with microwave radiation in a closed system. First, the effects of temperature and molar ratio EG/TPA on the number-average molecular weight (
Ana Christy Espinosa-López +7 more
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How to Make Colorless Poly(ethylene terephthalate)(PET)
International Journal of Polymeric Materials, 2001Abstract The methods and flow charts used for the industrial preparation of PET are shown and briefly discussed. Then, the three classes of contaminants usually appearing in PET are described and their causes elucidated. The organic contaminants impart to the produced PET an undesired yellow-amber tinge while those containing metal ions or elemental ...
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Environmental Science and Pollution Research, 2018
In the present study, the recycled post-consumption polyethylene terephthalate (PET) flakes were investigated as possible raw materials for the production of food packaging. After heating at 220 °C for 1 h, a steaming stage was conducted as a control test to assess the quality of the product.
Fatma Masmoudi +4 more
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In the present study, the recycled post-consumption polyethylene terephthalate (PET) flakes were investigated as possible raw materials for the production of food packaging. After heating at 220 °C for 1 h, a steaming stage was conducted as a control test to assess the quality of the product.
Fatma Masmoudi +4 more
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Polymer Degradation and Stability, 2015
The alkali resistance of poly(ethylene terephthalate) (PET) and a series of poly(ethylene glycol-co-1,4-cyclohexanedimethanol terephthalate) (PETG) copolyesters with different molar ratios of ethylene glycol (EG) to 1,4-cyclohexanedimethanol (CHDM) was systematically investigated. Differential scanning calorimetry (DSC) and wide-angle X-ray diffraction
Tingting Chen, Weikai Zhang, Jun Zhang
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The alkali resistance of poly(ethylene terephthalate) (PET) and a series of poly(ethylene glycol-co-1,4-cyclohexanedimethanol terephthalate) (PETG) copolyesters with different molar ratios of ethylene glycol (EG) to 1,4-cyclohexanedimethanol (CHDM) was systematically investigated. Differential scanning calorimetry (DSC) and wide-angle X-ray diffraction
Tingting Chen, Weikai Zhang, Jun Zhang
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Biological Valorization of Poly(ethylene terephthalate) Monomers for Upcycling Waste PET
ACS Sustainable Chemistry and Engineering, 2019Poly(ethylene terephthalate) (PET), composed of terephthalic acid (TPA) and ethylene glycol (EG), is the most commonly produced polyester.
Hee Taek Kim, Jae Kyun Kim, Hyun Gil Cha
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