Results 211 to 220 of about 14,492 (257)
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Polycondensation kinetics of poly(ethylene terephthalate) and poly(butylene terephthalate)
Polymer, 1986Abstract The polycondensation kinetics of poly(ethylene terephthalate) (PET) and poly(butylene terephthalate) (PBT) in the absence of catalyst are found to be of different nature. By means of a set of multiparameter kinetic equations, the kinetic behaviour of PET polycondensation can be simulated numerically; the cause of the disparity is found to be
Tong-yin Yu +4 more
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Enzymes for the Biofunctionalization of Poly(Ethylene Terephthalate)
2010The functionalization of synthetic polymers such as poly(ethylene terephthalate) to improve their hydrophilicity can be achieved biocatalytically using hydrolytic enzymes. A number of cutinases, lipases, and esterases active on polyethylene terephthalate have been identified and characterized.
Wolfgang, Zimmermann, Susan, Billig
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Polymer, 2005
Abstract Uniaxial and plane strain compression experiments are conducted on amorphous poly(ethylene terephthalate) (PET) and poly(ethylene terephthalate)-glycol (PETG) over a wide range of temperatures (25–110 °C) and strain rates (.005–1.0 s −1 ).
Rebecca B Dupaix, Mary C Boyce
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Abstract Uniaxial and plane strain compression experiments are conducted on amorphous poly(ethylene terephthalate) (PET) and poly(ethylene terephthalate)-glycol (PETG) over a wide range of temperatures (25–110 °C) and strain rates (.005–1.0 s −1 ).
Rebecca B Dupaix, Mary C Boyce
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Structure of poly(ethylene terephthalate)
Journal of Macromolecular Science, Part B, 1967Abstract This article summarizes electron microscopy, X-ray diffraction, and infrared spectroscopy examinations of poly(ethylene terephthalate) which have been published in recent issues of the Journal of Macromolecular Science—Physics [1-3]. The structure of glassy poly(ethylene terephthalate) and the effect of crystallization from the glass by ...
P. H. Geil +3 more
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The aminolysis of poly(ethylene terephthalate)
Journal of Applied Polymer Science, 1987Influence de recuit ou de traitement par DMF sur les pertes de poids apres aminolyse ce qui jette le doute sur la selectivite de l'aminolyse et la mesure de cristallinite par extrapolation des ...
Y. W. Awodi +3 more
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Annealing of poly (ethylene terephthalate)
European Polymer Journal, 2014Abstract Poly (ethylene terephthalate), PET, crystallized isothermally at 234 °C has been annealed above the crystallization temperature in regimes II, below the onset of melting, and in regime III, in the range of observable melting [1] , [2] . The mechanism has been analyzed by differential scanning calorimetry and FTIR spectroscopy and shown to ...
Ziyu Chen, M.J. Jenkins, J.N. Hay
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Powdered poly(ethylene terephthalate)
Die Angewandte Makromolekulare Chemie, 1980AbstractThe influence of the conditions of preparation on the properties of powdered poly(ethylene terephthalate) was followed from the point of view of its specific surface. The powdered poly(ethylene terephthalate) prepared by reprecipitation from the melt of 6‐caprolactam has a porous and structured surface, and consequently, also a large specific ...
Jiří Budín, Vladimír Kubánek
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The glycolysis of poly(ethylene terephthalate)
Journal of Applied Polymer Science, 1999The experiments were carried out in excess ethylene glycol (EG) and poly(ethylene terephthalate) (PET) oligomer in the presence of zinc acetate as catalyst at 190°C. It was found that during the glycolysis reaction, the monomer and dimer were contained in the liquid phase.
Jong-Wu Chen, Leo-Wang Chen
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Nucleation in poly(ethylene terephthalate)
Acta Polymerica, 1982AbstractMeasurements of isothermal crystallization kinetics of poly(ethylene terephthalate) including defined solid nucleating agents have been performed by DSC method in broad temperature range. Based on the results and knowledge of growth rate of spherulities in PETP the nucleation rates were calculated.
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Hydrolyzable poly(ethylene terephthalate)
Journal of Environmental Polymer Degradation, 1994Due to the enormous annual increase in the volume of municipal solid waste, society's attention is focused on how to manage the solid waste problem. Plastic materials not only contribute a great deal to the litter problem but also create serious danger to the ecology. Every year, countless birds, sea turtles, and other marine mammals die from eating or
Sherry Heidary, Bernard Gordon
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