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3.537 Aktuelle Fachpublikationen zum Thema temperature

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Nonisothermal curing kinetics of epoxy resin composite utilizing Ga (III) xanthate as a latent catalyst

21.03.2015 | Tarun Chand Vagvala, Gaurav Kapil, Shyam S. Pandey, Yuhei Ogomi, Shuzi Hayase, Journal of Applied Polymer Science, 2015

ABSTRACT Cure kinetics and curing mechanism of epoxy resin composite utilizing gallium (III) xanthate as a latent catalyst was investigated and compared with the commercial latent catalyst UCAT3512T formulation. Nonisothermal differential scanning calorimetric technique at different heating ...

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Iron oxide superparamagnetic nanocarriers bearing amphiphilic N‐heterocyclic choline analogues as potential antimicrobial agents

21.03.2015 | Alla Zablotskaya, Izolda Segal, Yuris Popelis, Anatoly Mishnev, Mikhail Maiorov, Dmitry Zablotsky, Elmars Blums, Viz ..., Applied Organometallic Chemistry, 2015

Magnetic nanoparticles represent an advanced tool in biomedicine because they can be simultaneously functionalized and guided using a magnetic field. Iron oxide magnetic nanoparticles precoated with oleic acid and bearing novel antimicrobial N‐heterocyclic choline analogues, namely O‐, N‐ and ...

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New formula for calculating time to ignition of semi‐infinite solids

18.03.2015 | Ulf Wickström, Fire and Materials, 2015

Summary An analytical closed form formula is presented for explicitly calculating time to reach ignition temperature of semi‐infinite solids exposed to constant incident radiation and gas temperature as for example in the cone calorimeter. The non‐linear boundary condition due to the emitted ...

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Understanding and tailoring the degradation of PVA‐tyramine hydrogels

16.03.2015 | Khoon S. Lim, Justine J. Roberts, Marie‐Helene Alves, Laura A. Poole‐Warren, Penny J. Martens, Journal of Applied Polymer Science, 2015

ABSTRACT We have previously reported on a hydrogel system fabricated from poly(vinyl alcohol) (PVA) functionalized with tyramine groups (PVA‐Tyr) that has the ability to co‐polymerize with proteins in their native state. These gels were also shown to be hydrolytically degradable through the ...

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Adjustable amine–epoxy composition in a stratified thin film with a spin‐coating process: A useful tool for establishing relationships between the local glass‐transition temperature at the interface and the network structure

16.03.2015 | Pascal Carriere, Sandra Onard, Isabelle Martin, Jean‐François Chailan, Journal of Applied Polymer Science, 2015

ABSTRACT An easy method for preparing supported homogeneous epoxy–amine thin films on a silica surface consisting of two distinct layers was developed via spin coating from epoxy–amine solutions. Because of these two layers had the controlled properties of the upper layer, we showed that it ...

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Effect of N2 pretreatment on the basicity, structural change, and isomerization activity of MgO and MgO/Mg(OH)2 catalysts

16.03.2015 | Prinyanee Suttibut, Kongkiat Suriye, Sirachaya Kunjara Na Ayudhya, Piyasan Praserthdam, Joongjai Panpranot, Asia-Pacific Journal of Chemical Engineering, 2015

Abstract As revealed by the X‐ray diffraction, basicity titration, and Fourier transform infrared spectroscopy results, changes in the structural properties, basicity, and isomerization activities were observed on the MgO catalysts upon N2 pretreatment at 325 °C followed by isomerization ...

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Viscosity model for choline chloride‐based deep eutectic solvents

16.03.2015 | Farouq S. Mjalli, Jamil Naser, Asia-Pacific Journal of Chemical Engineering, 2015

ABSTRACT In this work, a viscosity model for choline chloride‐based deep eutectic solvents (DESs) was developed. In addition to temperature, the new model presented here considers the composition of the salt in the DES, which was not the case for all previously reported viscosity models. Two ...

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Electrospinning of gelatin fibers using solutions with low acetic acid concentration: Effect of solvent composition on both diameter of electrospun fibers and cytotoxicity

13.03.2015 | Marisa Erencia, Francisco Cano, Jose A. Tornero, Margarida M. Fernandes, Tzanko Tzanov, Jorge Macanás, Fernando Carrillo, Journal of Applied Polymer Science, 2015

ABSTRACT Gelatin fibers were prepared by electrospinning of gelatin/acetic acid/water ternary mixtures with the aim of studying the feasibility of fabricating gelatin nanofiber mats at room temperature using an alternative benign solvent by significantly reducing the acetic acid concentration. ...

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Synthesis and swelling properties of a pH‐ and temperature‐dual responsive hydrogel by inverse microemulsion polymerization

13.03.2015 | Tao Wan, Qiaohe Chen, Qihua Zhao, Runqiu Huang, Ling Liao, Jing Xiong, Li Tang, Journal of Applied Polymer Science, 2015

ABSTRACT A novel pH‐ and temperature‐dual responsive hydrogel was synthesized by inverse microemulsion polymerization, using itonic acid (IA) as pH‐responsive monomer, N‐isopropylacrylamide (NPAM) as thermo‐responsive monomer and acrylamide (AM) as the nonionic hydrophilic monomer. Factors ...

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Rheology and crystallization behavior of PLLA/TiO2‐g‐PDLA composites

13.03.2015 | Zhanxin Jing, Xuetao Shi, Guangcheng Zhang, Jiang Li, Polymers for Advanced Technologies, 2015

Poly(L‐lactide) (PLLA) composites with TiO2‐g‐poly(D‐lactide) (PDLA), which was synthesized by surface‐initiated opening ring polymerization with TiO2 as initiator and Sn(Oct)2 as catalyst, were prepared by solution casting. The synthesized TiO2‐g‐PDLA was characterized by transmission electron ...

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