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  1. Article ; Online: Poly (1-butene-

    Marega, Carla / Malizia, Federica / Spataro, Stefano

    Polymers

    2019  Volume 11, Issue 7

    Abstract: Samples of random poly(butene- ...

    Abstract Samples of random poly(butene-
    Language English
    Publishing date 2019-07-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym11071133
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Crystal structures of Ziegler-Natta catalyst supports.

    Malizia, Federica / Fait, Anna / Cruciani, Giuseppe

    Chemistry (Weinheim an der Bergstrasse, Germany)

    2011  Volume 17, Issue 49, Page(s) 13892–13897

    Abstract: The crystal structures of three MgCl(2)·nEtOH complexes with n=1.5, 2.8, and 3.3 have been fully determined. Such complexes are the fundamental precursors for Ziegler-Natta polymerization catalysts used to produce polyolefins on a multimillion-ton scale ... ...

    Abstract The crystal structures of three MgCl(2)·nEtOH complexes with n=1.5, 2.8, and 3.3 have been fully determined. Such complexes are the fundamental precursors for Ziegler-Natta polymerization catalysts used to produce polyolefins on a multimillion-ton scale worldwide. The ab initio structure solution showed that the structure of MgCl(2)·nEtOH complexes with n=1.5 and 2.8 are based on ribbons of metal-centered octahedra, whereas for n=3.3 this chainlike arrangement breaks into a threadlike structure of isolated octahedra linked by hydrogen bonds. A clear correlation between catalyst performance and the crystal structure of precursors has been found, and reveals the fundamental role of the latter in determining catalyst properties. The direct knowledge of building blocks in the precursor structures will help to develop more accurate models for activated catalysts. These models will not require the arbitrary and oversimplified assumption of locating the catalyst active sites on selected cut surfaces of the α-MgCl(2) crystal lattice.
    Language English
    Publishing date 2011-12-02
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1478547-x
    ISSN 1521-3765 ; 0947-6539
    ISSN (online) 1521-3765
    ISSN 0947-6539
    DOI 10.1002/chem.201101900
    Database MEDical Literature Analysis and Retrieval System OnLINE

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