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5.189 Aktuelle Fachpublikationen aus der Branche Verfahrenstechnik

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Synthesis and characterization of isocyanate‐functionalized hyperbranched polyurethane and its cocuring with benzoxazine

11.04.2014 | Yuhong Liu, Xiying Zhang, Ning Gao, Polymer Engineering and Science, 2014

In the study, isocyanate‐functionalized hyperbranched polyurethane (HPUNCO) with a degree of branch of 35.2% was synthesized via an A2 + B3 method. This novel HPUNCO was used to fabricate a blend system with hydroxyl groups bearing benzoxazine precursor (BZOH) to investigate its effective on ...

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Preparation of polypropylene and polystyrene with NCO and NH2 functional groups and their applications in polypropylene/polystyrene blends

11.04.2014 | Hao Li, Xian‐Ming Zhang, Shi‐Yang Zhu, Wen‐Xing Chen, Lian‐Fang Feng, Polymer Engineering and Science, 2014

Isocyanate‐ and amine‐functionalized polypropylene (PP) and polystyrene (PS) were prepared through grafting and copolymerization method. These compounds are used as precursors for PP‐graft‐PS (PP‐g‐PS) copolymers and reacted at the matrix interface of PP/PS blends. Functionalized polymer ...

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Comparison of combustion behaviors and pollutant emissions using bituminous coal and corncob in a fluidized bed combustor

10.04.2014 | Feng Duan, Chien‐Song Chyang, Jim Tso, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT The combustion behaviors and pollutant emissions of corncob and bituminous coal in a pilot scale vortexing fluidized bed combustor was compared. The flue gas recirculation combustion mode was used in this study. The effects of operating parameters, such as stoichiometric oxygen ratio, ...

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Surface decoration of electrospun scaffolds by microcontact printing

10.04.2014 | Sara M. Giannitelli, Franca Abbruzzese, Pamela Mozetic, Adele De Ninno, Luca Businaro, Annamaria Gerardino, Alberto ..., Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT Microcontact printing has emerged as one of the most straightforward methods of surface patterning and has been successfully employed to obtain biologically instructive substrates for a wide range of tissue engineering applications. However, although a consolidated success has been ...

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Effects of acid treatments on bamboo cellulose nanocrystals

10.04.2014 | Peng Peng Zhang, Dong Shen Tong, Chun Xiang Lin, Hui Min Yang, Zhe Ke Zhong, Wei Hua Yu, Hao Wang, Chun Hui Zhou, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT The production of nanocellulose with controlled structure from plant sources with easy availability and good sustainability is very important in science and engineering. In this work, the isolation of cellulose from bamboo and the effects of the hydrolysis of different acids on the ...

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Evaluation of Impact Velocity and Compression Force of Moist Zeolite 4A Granules at Breakage using an Equivalence Function

07.04.2014 | Peter Mueller, Sergej Aman, Juergen Tomas, Chemical Engineering & Technology, 2014

Abstract Moist, spherical zeolite 4A granules were tested by compression at a constant loading velocity until primary breakage, and were also rectilinearly accelerated and impacted to achieve breakage using a pneumatic canon. The compressive breakage force and the impact breakage velocity ...

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CFD‐Discrete Element Method Simulations Combined with Compression Experiments to Characterize Stirred‐Media Mills

07.04.2014 | Stefan Beinert, Carsten Schilde, Greta Gronau, Arno Kwade, Chemical Engineering & Technology, 2014

Abstract Micromechanical aggregate properties are correlated with stress conditions during the dispersion process in a stirred‐media mill. The fracture energy distribution of the aggregates measured via micro‐compression tests is compared with the stress energy distribution in a stirred‐media ...

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Ultrafine Grinding of Limestone with Sodium Polyacrylates as Additives in Ordinary Portland Cement Mortar

07.04.2014 | Katja Ohenoja, Sandra Breitung‐Faes, Päivö Kinnunen, Mirja Illikainen, Juha Saari, Arno Kwade, Jouko Niinimäki, Chemical Engineering & Technology, 2014

Abstract Sodium polyacrylates permit a higher solids concentration during grinding, reducing the resulting particle size and/or specific energy consumption. Their impact on fine and ultrafine grinding of limestone was studied. Sodium polyacrylate with a low polydispersity index was found to be ...

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Mechanochemistry in Technology: From Minerals to Nanomaterials and Drugs

07.04.2014 | Peter Baláž, Matej Baláž, Zdenka Bujňáková, Chemical Engineering & Technology, 2014

Abstract Mechanochemistry, a branch of solid‐state chemistry, analyzes processes which can occur in solids due to the application of mechanical energy. This energy is supplied by high‐energy milling. The mechanochemical approach belongs to the group of procedures that intensify the course of ...

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Progress and Challenges in Electrical Comminution by High‐Voltage Pulses

07.04.2014 | Fengnian Shi, Emmy Manlapig, Weiran Zuo, Chemical Engineering & Technology, 2014

Abstract The recent progress in electrical comminution using high‐voltage pulses and the technical challenges in order to bring this technology to the mining industry are outlined. Pre‐weakening ore particles and preferential liberation of minerals at coarse sizes are the two major research ...

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