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3.404 Aktuelle Fachpublikationen zum Thema temperature

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Investigation of the Enantioselectivity of Tetramethylammonium L‐hydroxyproline Ionic Liquid as a Novel Chiral Ligand in Ligand‐Exchange CE and Ligand‐Exchange MEKC

14.11.2014 | Ruijuan Liu, Yingxiang Du, Jiaquan Chen, Qi Zhang, Shuaijing Du, Zijie Feng, Chirality, 2014

ABSTRACT Chiral ionic liquids (ILs) have drawn more and more attention in separation science; however, only a few papers focused on the application of chiral ILs as chiral ligands in LE‐CE. In this article, a novel amino acid ionic liquid (AAIL), tetramethylammonium L‐hydroxyproline ...

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Microwave assisted glycolysis of poly(ethylene terephthalate) catalyzed by 1‐butyl‐3‐methylimidazolium bromide ionic liquid

14.11.2014 | Mohamed A. Alnaqbi, Mahmoud A. Mohsin, Reneesh M. Busheer, Yousef Haik, Journal of Applied Polymer Science, 2014

ABSTRACT The combination of ionic liquid (IL) associated with microwave energy may have some potential application in the chemical recycling of poly (ethylene terephthalate). In this processes, glycolysis of waste poly (ethylene terephthalate) recovered from bottled water containers were ...

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Decomposition mechanisms of cured epoxy resins in near‐critical water

13.11.2014 | Xianyun Gong, Yuyan Liu, Songquan Wu, Daowei Ding, Huige Wei, Zhanhu Guo, Journal of Applied Polymer Science, 2014

ABSTRACT A reaction mechanism based on the near‐critical water homolysis of bonds in the cured epoxy followed by the saturation of the resulting radicals by hydrogen abstraction from the donor was discussed. The compounds evolved during degradation were identified by gas chromatography and ...

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Synthesis of nanostructure hydroxy sodalite composite membranes via hydrothermal method: support surface modification and synthesis method effects

13.11.2014 | Neda Kalantari, Mohammad Javad Vaezi, Mostafa Yadollahi, Ali Akbar Babaluo, Behruz Bayati, Akram Kazemzadeh, Asia-Pacific Journal of Chemical Engineering, 2014

ABSTRACT Multilayer hydroxy sodalite zeolite membranes were synthesized on the outer surface of support with and without modification via in situ and secondary growth hydrothermal synthesis methods. The synthesized zeolite membranes were characterized by X‐ray diffraction, scanning electron ...

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Combustion properties of Brazilian natural wood species

13.11.2014 | Monique Amaro Rocha, Alexandre Landesmann, Fire and Materials, 2014

SUMMARY This paper investigates the combustion characteristics of 12 wood species natural to Brazil. A mass loss cone calorimeter was used to obtain the properties associated with (i) heat release rate (HRR), peak HRR, and total heat released; (ii) total mass loss and mass loss rate; (iii) ...

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Simplified correlations of gypsum board thermal properties for simulation tools

12.11.2014 | Georgios K. Semitelos, Ioannis D. Mandilaras, Dimos A. Kontogeorgos, Maria A. Founti, Fire and Materials, 2014

SUMMARY The current work proposes for the first time an integrated set of simplified correlations for the thermal properties, i.e. effective thermal conductivity, effective specific heat and effective density, of commercial gypsum boards as a function of temperature that can be easily ...

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Synthesis of comb‐type copolymers with various pendants and their effect on the complex rheological behaviors of waxy oils

11.11.2014 | Tongshuai Wang, Jun Xu, Minglei Wang, Xiaoming Wei, Muxian Shen, Jing Huang, Rui Zhang, Li Li, Xuhong Guo, Journal of Applied Polymer Science, 2014

ABSTRACT To improve the flowability of waxy crude oil containing a high concentration of asphaltenes (AS), novel comb‐type copolymers of poly(maleic acid polyethylene glycol ester‐co‐α‐octadecene) (PMAC) and poly(maleic acid aniline amide‐co‐α‐octadecene) (AMAC) with various grafting ratios ...

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A conductive foam: Based on novel poly(styrene‐b‐butadiene‐co‐styrene‐b‐styrene) tri‐block copolymer filled by carbon black

11.11.2014 | Jihai Zhang, Tao Zhou, Jing Zhao, Canyao Yuan, Liping Xia, Ningfeng Sun, Weidong Zhang, Aimin Zhang, Journal of Applied Polymer Science, 2014

ABSTRACT In this article, a conductive foam based on a novel styrene‐based thermoplastic elastomer called poly(styrene‐b‐butadiene‐co‐styrene‐b‐styrene) tri‐block copolymer S(BS)S was prepared and introduced. S(BS)S was particularly designed for chemical foaming with uniform fine cells, which ...

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Design, polymerization, and properties of polyurethane elastomers from miscible, immiscible, and hybridized seed‐oil derived soft segment blends

11.11.2014 | Mark F. Sonnenschein, Valeriy V. Ginzburg, Adam L. Grzesiak, Klaus Schiller, Benjamin L. Wendt, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT Polyester seed‐oil derived polyols have been prepared and blended with conventional polyols for making polyurethane elastomers. Miscibility was complete for polypropylene oxide/polyethylene oxide and polytetramethylene oxide (PTMEG). Blends of polyester seed‐oil derived polyols with ...

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Distinguishing co‐existing unimolecular and bimolecular structural forms using joint analysis of Raman and UV absorption data

11.11.2014 | Pavla Pečínková, Jiří Bok, Kateřina Hofbauerová, Josef Štěpánek, Journal of Raman Spectroscopy, 2014

Standard Raman measurements of solutions require relatively high concentration of dissolved species, which supports formation of intermolecular complexes. In case of simultaneous presence of unimolecular and bimolecular structural forms, it is often difficult or even impossible to discriminate ...

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