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3.369 Aktuelle Fachpublikationen zum Thema temperature

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Biological evaluation of chitosan‐based in situ‐forming hydrogel with low phase transition temperature

25.10.2014 | Qi Feng Dang, Jing Quan Yan, Hong Lin, Cheng Sheng Liu, Xi Guang Chen, Qiu Xia Ji, Jing Li, Ya Liu, Journal of Applied Polymer Science, 2014

ABSTRACT The aims of current study were to choose a method for preparing sterile chitosan‐α,β‐glycerophosphate (CS‐α,β‐GP) in situ‐forming hydrogel which had potential applications in tissue engineering and evaluated its biocompatibility and degradation characteristics. The results of ...

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Gaseous titanium molybdates and tungstates: Thermodynamic properties and structures

24.10.2014 | Sergey I. Lopatin, Andrej I. Panin, Sergey M. Shugurov, Ksenia A. Emelyanova, Rapid Communications in Mass Spectrometry, 2014

RATIONALE Titanium is a component of various construction materials, which is often used at high temperature and in an oxidizing atmosphere. Thermally stable even at high temperatures, titanium compounds may appear in the condensed phase. To predict the possibility of existence of gaseous ...

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Study on the high‐temperature behavior and rehydration characteristics of hardened cement paste

23.10.2014 | Guiming Wang, Chao Zhang, Bin Zhang, Qiu Li, Zhonghe Shui, Fire and Materials, 2014

SUMMARY The high‐temperature behavior and rehydration characteristics of the hardened cement paste and their mechanisms have been studied in this paper. X‐ray diffraction and thermogravimetry are used to establish the effect of elevated temperatures on the mineralogical changes that occurred ...

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The toughening effect and mechanism of styrene‐butadiene rubber nanoparticles for novolac resin

23.10.2014 | Wei‐Wei Liu, Jing‐Jing Ma, Mao‐Sheng Zhan, Kai Wang, Journal of Applied Polymer Science, 2014

ABSTRACT In this article, phenolic nanocomposites were prepared using styrene–butadiene rubber (SBR) nanoparticles with an average particle size of about 60 nm as the toughening agent. The mechanical and thermal properties of phenolic nanocomposites and the toughening mechanism were studied ...

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Impact of oxygen transport properties on the kinetic modeling of polypropylene thermal oxidation. II. Effect of oxygen diffusivity

23.10.2014 | Alexandre François‐Heude, Emmanuel Richaud, Alain Guinault, Eric Desnoux, Xavier Colin, Journal of Applied Polymer Science, 2014

ABSTRACT The kinetic model, established in a previous article (François‐Heude et al., J. Appl. Polym. Sci., in press) to predict the homogeneous oxidation in iPP films typically thinner than 100 µm, is now extended to simulate the oxidation profiles in thicker plates by coupling the oxygen ...

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An assessment of beeswax as a thickener for environmentally friendly lubricating grease production

23.10.2014 | Raimondas Kreivaitis, Juozas Padgurskas, Milda Gumbytė, Artūras Kupčinskas, Tribotest, 2014

ABSTRACT Environmentally friendly lubricants are preferred in many applications where groundwater or soil pollution is possible. The main purpose of the current study was to evaluate the possibility of beeswax use as a thickener for lubricating greases. European beeswax was used as a ...

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Amphoteric hydrolyzed Poly(acrylamide/dimethyl diallyl ammonium chloride) as a filtration reducer under high temperatures and high salinities

21.10.2014 | Ling Lin, Pingya Luo, Journal of Applied Polymer Science, 2014

ABSTRACT Poly(acrylamide/dimethyl diallyl ammonium chloride) (PAD) samples were synthesized via solution polymerization. Hydrolyzed poly(acrylamide/dimethyl diallyl ammonium chloride) (HPAD) was prepared with NaOH as a hydrolyzation agent. Both PAD and HPAD were characterized by IR and NMR ...

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Synthesis, phase evolution and optical properties of Tb3+‐doped KF–YbF3 system materials

21.10.2014 | Chunyan Cao, Renping Cao, Siling Guo, An. Xie, Hyeon Mi. Noh, Jung Hyun Jeong, Luminescence, 2014

ABSTRACT KF–YbF3 system materials have been synthesized by a hydrothermal method without any surfactant or template. By controlling the reactant ratios of KF:Yb3+, the hydrothermal temperature and the pH of the prepared solutions, the final products can evolve among the orthorhombic phase of ...

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Analytical techniques used for the characterization and authentification of six ancient religious manuscripts (XVIII–XIX centuries)

21.10.2014 | Nicoleta Vornicu, Viorica Deselnicu, Cristina Bibire, Daniela Ivanov, Florica Doroftei, Microscopy Research and Technique, 2014

ABSTRACT This article presents the experimental results of a research on six manuscripts (three of the XVIII century and three of XIX century) belonging collection of old religious books to the Moldovan Metropolitan Church of Romania. Non‐invasive techniques (optical microscopy [OM], scanning ...

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ROMP synthesis of novel thermo‐, pH‐, and salt‐responsive (co)polymers containing the morpholino functional group

21.10.2014 | Johannes A. Hensbergen, Sylvia Ganda, Peter J. Roth, Robert P. Burford, Andrew B. Lowe, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT We report the ring‐opening metathesis polymerization (ROMP) synthesis of novel (co)polymers containing the multiresponsive morpholino functional group [(3aR,7aS)−2‐(2‐morpholinoethyl)−3a,4,7,7a‐tetrahydro‐1H−4,7‐epoxyisoindole‐1,3(2H)‐dione (M1)]. All (co)polymers were prepared with ...

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