Search Results - "Marcius A. Ullmann"

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  1. 1
    Deactivation study of zirconocene immobilization into Lewis acid and dual-shell silicas prepared by a nonhydrolytic sol-gel method

    Deactivation study of zirconocene immobilization into Lewis acid and dual-shell silicas prepared by a nonhydrolytic sol-gel method by Ullmann, Marcius A., dos Santos, João H.Z.

    Published in Journal of catalysis (01-10-2019)
    “…[Display omitted] •A new class of polymerization catalysts was described as a Dual-shell silica structures.•Lewis acid catalysts get improvements at poison…”
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  2. 2
    The use of calcination as a cue for structure characterization of entrapped metallocene catalysts on hybrid organic–inorganic silicas

    The use of calcination as a cue for structure characterization of entrapped metallocene catalysts on hybrid organic–inorganic silicas by Ullmann, Marcius A., dos Santos, João H. Z.

    “…Organic–inorganic hybrid one-layer systems, entrapping Cp 2 ZrCl 2 were calcined to investigate the silica pores after organic portion volatilization. The…”
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  3. 3
    Silica-supported metallocene catalyst poisoning: The effect of surface modification on the efficiency of the catalytic system

    Silica-supported metallocene catalyst poisoning: The effect of surface modification on the efficiency of the catalytic system by Ullmann, Marcius A., Bernardes, Arthur A., dos Santos, João H.Z.

    “…[Display omitted] Cp2ZrCl2 was immobilized on silica by two methods: direct grafting (GS) and via entrapment within silica matrix, produced by the…”
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  4. 4
    Zirconocene immobilization into organic-inorganic dual-shell silicas prepared by the nonhydrolytic sol-gel method for polyethylene production

    Zirconocene immobilization into organic-inorganic dual-shell silicas prepared by the nonhydrolytic sol-gel method for polyethylene production by Ullmann, Marcius A., dos Santos, João H.Z.

    Published in Journal of catalysis (01-05-2020)
    “…[Display omitted] •Dual-shell systems: new class of supported metallocene with higher activity than one-shell ones.•These systems were coated by a…”
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  5. 5
    "PHARAOH'S SNAKES" - HISTORY OF A FUN PYROTECHNICAL EXPERIMENT AND ITS APPLICABILITY IN TEACHING BASIC CHEMICAL PRINCIPLES

    "PHARAOH'S SNAKES" - HISTORY OF A FUN PYROTECHNICAL EXPERIMENT AND ITS APPLICABILITY IN TEACHING BASIC CHEMICAL PRINCIPLES by Ullmann, Marcius A., Wallau, Wilhelm M., Bianchini, Daniela, Schneid, Andressa da C., Montenegro, Lara M. P.

    Published in Química nova (2014)
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  6. 6
    "Serpentes de Faraó": a história de uma brincadeira pirotécnica e sua aplicabilidade no ensino de princípios químicos básicos

    "Serpentes de Faraó": a história de uma brincadeira pirotécnica e sua aplicabilidade no ensino de princípios químicos básicos by Marcius A. Ullmann, Wilhelm M. Wallau, Daniela Bianchini, Andressa da C. Schneid, Lara M. P. Montenegro

    Published in Química Nova (01-01-2014)
    “…Fun methodologies developed with alternative materials for teaching chemical reactions of carbon are interesting activities for discussing concepts of…”
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