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2.024 Aktuelle Fachpublikationen zum Thema temperature

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Experimental and theoretical study of the peculiarities of the thermo‐mechanical behavior of semicrystalline polymers

11.04.2015 | Irina O. Glot, Lyudmila A. Golotina, Igor N. Shardakov, Polymer Composites, 2015

A mathematical model for semicrystalline polymers is proposed to predict the specific features of thermal and deformation phenomena, which are realized in the processes of phase (crystallization) and relaxation (glassy‐type) transitions. To describe deformation phenomena, constitutive equations ...


Phthalonitrile end‐capped polyarylene ether nitrile: crystals embedded in matrix through crosslinking reaction

07.04.2015 | Lifen Tong, Kun Jia, Xiaobo Liu, Polymer International, 2015

Abstract A novel single‐component composite based on phthalonitrile end‐capped polyarylene ether nitrile (PEN‐Ph) which possesses crosslinking reaction combined with crystallization behavior had been prepared successfully by hot‐compressing. The project focuses on studying the influence of the ...


Fast Surface Diffusion of Amorphous o-Terphenyl and Its Competition with Viscous Flow in Surface Evolution

06.04.2015 | Wei Zhang; Caleb W. Brian; Lian Yu, Journal of Physical Chemistry B, 2015

Surface self-diffusion coefficients have been measured for the model molecular glass o-terphenyl (OTP) through surface-grating decay driven by capillarity. The decay mechanism transitions from viscous flow at high temperatures to surface diffusion at low temperatures; for 1000 nm wavelength ...


Temperature Dependence of Structural Properties and Chain Configurational Study: A Molecular Dynamics Simulation of Polyethylene Chains

03.04.2015 | Haifeng Lu, Zhiping Zhou, Tongfan Hao, Xubo Ye, Yijing Ne, Macromolecular Theory and Simulations, 2015

Micro‐structural evolution of polyethylene (PE) across the glass transition temperature (Tg) is investigated by full atom molecular dynamic (MD) simulation. The specific volume as a function of temperature for PE is obtained, through which the volumetric glass transition temperature was ...


Thermoluminescence properties of lithium magnesium borate glasses system doped with dysprosium oxide

01.04.2015 | M. H. A. Mhareb, S. Hashim, S. K. Ghoshal, Y. S. M. Alajerami, M. A. Saleh, N. A. B. Razak, S. A. B. Azizan, Luminescence, 2015

Abstract We report the impact of dysprosium (Dy3+) dopant and magnesium oxide (MgO) modifier on the thermoluminescent properties of lithium borate (LB) glass via two procedures. The thermoluminescence (TL) glow curves reveal a single prominent peak at 190 °C for 0.5 mol% of Dy3+. An increase ...


Effect of Electric Field/Current on Liquid Phase Sintering

30.03.2015 | Jesus Gonzalez‐Julian, Olivier Guillon, Journal of the American Ceramic Society, 2015

The sintering behavior of alumina containing different amounts of calcium–aluminum–silicate glass as sintering aid was analyzed under AC electric fields between 0 and 150V/cm. Liquid phase sintering was enhanced by the electric field, and “flash sintering” behavior depending on the current ...


The linear rheological responses of wedge‐type polymers

28.03.2015 | Miao Hu, Yan Xia, Christopher S. Daeffler, Jinhua Wang, Gregory B. McKenna, Julia A. Kornfield, Robert H. Grubbs, Journal of Polymer Science Part B: Polymer Physics, 2015

ABSTRACT The linear rheological responses of a series of specially designed wedge‐type polymers synthesized by the polymerization of large molecular weight monomers have been measured. These wedge polymers contained large side groups which contained three flexible branch chains per polymer ...


Microfluidic Two-Dimensional Separation of Proteins Combining Temperature Gradient Focusing and Sodium Dodecyl Sulfate-Polyacrylamide Gel Electrophoresis

26.03.2015 | Seyed Mostafa Shameli; Carolyn L. Ren, Analytical Chemistry, 2015

A two-dimensional separation system is presented combining scanning temperature gradient focusing (TGF) and sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis (PAGE) in a PDMS/glass microfluidic chip. Denatured proteins are first focused and separated in a 15 mm long channel via TGF ...


Effect of deposition temperature on transparent conductive properties of γ‐CuI film prepared by vacuum thermal evaporation

24.03.2015 | Min Zi, Juan Li, Zichao Zhang, Xuesong Wang, Jun Han, Xiaopeng Yang, Zhiwen Qiu, Haibo Gong, Ziwu Ji, Bingqiang Cao, physica status solidi (a), 2015

Copper (I) iodide (CuI) films are grown on glass substrates with a direct vacuum thermal evaporation method, and the effect of substrate temperature on their photoluminescence and transparent conductive properties is discussed. The X‐ray diffraction (XRD) measurement identifies the ...


Temperature Controlled Sequential Gelation in Composite Microgel Suspensions

24.03.2015 | Jeroen Appel, Niek de Lange, Hanne M. van der Kooij, Ties van de Laar, Jan Bart ten Hove, Thomas E. Kodger, Joris Sp ..., Particle & Particle Systems Characterization, 2015

Depending on the volume fraction and interparticle interactions, colloidal suspensions can exhibit a variety of physical states, ranging from fluids, crystals, and glasses to gels. For microgel particles made of thermoresponsive polymers, both parameters can be tuned using environmental ...


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