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1.393 Aktuelle Fachpublikationen zum Thema temperature

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Measurements of slip velocity and frictional heating in the capillary extrusion of linear‐low density polyethylene with a fluoropolymer processing aid

30.04.2016 | H.S. Zamora‐López, J. Pérez‐González, B.M. Marín‐Santibáñez, J.F. Ortega‐Avila, Polymer Engineering and Science, 2016

The slip velocity and frictional or slip heating of linear‐low density polyethylene with a fluoropolymer processing aid in capillary flow were measured by rheo‐particle image velocimetry and thermal imaging. The pure polymer did not show slip before the stick‐slip regime but exhibited strong ...


Simplified flare combustion model for flare plume rise calculations

29.04.2016 | Kamran Rahnama, Alex De Visscher, The Canadian Journal of Chemical Engineering, 2016

Abstract The dispersion of plumes released from stacks depends on wind speed, plume emission rate, stack height, and other meteorological and stack variables. Plume rise is an important aspect of plume dispersion because it increases the apparent release height, which leads to lower ...


Mechanical, thermal, and dielectric properties of poly(lactic acid)/chitosan nanocomposites

28.04.2016 | Moataz A. Elsawy, Gamal R. Saad, Aisha M. Sayed, Polymer Engineering and Science, 2016

Poly(lactic acid) (PLA) loaded with various levels of chitosan nanoparticles (CsNP) (0–5.0%) were prepared by twin‐screw extrusion. The nanocomposites were investigated based on their morphology, thermal, mechanical and dielectric properties. The SEM morphology showed that CsNP was dispersed ...


Multi‐scale simulation of falling film short‐path distillation

19.04.2016 | Dong Zhu, Feng‐Xia Huang, Song‐Lin Xu, Yang Li, The Canadian Journal of Chemical Engineering, 2016

Abstract This study investigated issues relating to the multi‐scale simulation of falling film short‐path distillation. Both hydrodynamic conditions and gas phase kinetics have a considerable effect on the distillation process. At the micro‐scale, the DSMC (direct simulation Monte Carlo) ...


UV‐Enhanced Gas‐Solid Chlorination of Polyvinyl Chloride for Cleaner Production of Chlorinated Polyvinyl Chloride

19.04.2016 | Ding Mao, Qianli Yang, Xiong Zhang, Yi Cheng, Chemical Engineering & Technology, 2016

Abstract A vibrated‐bed reactor with an online UV‐Vis measuring system was established in order to reveal the dynamic process of UV‐enhanced chlorination of polyvinyl chloride (PVC). Influences of temperature, radiation time, and interval time of intermittent initiation on chlorination process ...


Catalytic oxidation removal of gaseous elemental mercury in flue gas over niobium‐loaded catalyst

19.04.2016 | Honghu Li, Jiangjun Hu, He Wang, The Canadian Journal of Chemical Engineering, 2016

Abstract Nb‐Co‐Ce/Al2O3 catalysts prepared by impregnation, sol‐gel method, and co‐precipitation were examined for elemental mercury (Hg0) oxidation in a simulated coal combustion flue gas. The catalysts were characterized by SEM‐EDS, BET, XRD, FTIR, and XPS techniques. The performances of ...


Isothermal and nonisothermal crystallization kinetics of fully bio‐based polyamides

15.04.2016 | Miaomiao He, Tao Wei, Liqun Zhang, Qingxiu Jia, Polymer Engineering and Science, 2016

We studied the crystallization behaviors of bio‐based BDIS polyamides synthesized from the following biomass monomers: 1,4‐butanediamine (BD), 1,10‐decanediamine (DD), itaconic acid (IA), and sebacic acid (SA). Isothermal crystallization, melting behavior, and nonisothermal crystallization of ...


Increased production of nanofibrous materials by electroblowing from blends of hyaluronic acid and polyethylene oxide

15.04.2016 | Marek Pokorny, Vladimir Rassushin, Lucie Wolfova, Vladimir Velebny, Polymer Engineering and Science, 2016

Natural and synthetic nanostructured polymers in the form of fibers are used in medical and cosmetic applications. One of the main advantages of the electrospinning method is its flexibility, which allows to use airflow in the vicinity of a spinneret to increase production. The acceleration of ...


Critical role of depressurization and effects of saturation conditions in the formation of β‐Crystal during isotactic polypropylene foaming with supercritical CO2

15.04.2016 | XianWu Cao, YaHui Qiao, YiXin Chen, GuangJian He, Hong Lin, Polymer Engineering and Science, 2016

The melting behavior and crystalline forms of isotactic polypropylene (iPP) samples crystallized under different conditions of pressure and temperature were investigated using differential scanning calorimeter (DSC) and wide‐angle X‐ray diffraction (WAXD), respectively. When treated with dynamic ...


Preparation and characterization of nicotine‐selective hydrogels

15.04.2016 | Yasemin Işikver, Tuğba Ecevit, Polymer Engineering and Science, 2016

In this study, P(NIPAAm‐MAm)/A, which is a new smart polymer on which the temperature sensitivity of N‐isopropyl acrylamide monomer and pH sensitivities of methacrylic acid (MA) and itaconic acid (IA) monomers unite, were prepared by free radical polymerization. The influence of crosslinkers on ...


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