L. Luciani’s scientific contributions

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Publications (2)


Advances in the Polymerization of Polyolefins with Coordination Catalysts
  • Article

March 2003

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58 Reads

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87 Citations

Angewandte Makromolekulare Chemie

P. Galli

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L. Luciani

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G. Cecchin

A historical survey about the development of Ziegler-Natta catalysts for polymerization of propylene is given. After having employed catalysts based on titaniumtrichloride for several years, in the 70's catalysts of the so-called second generation were introduced, which are more effective and yield products of higher crystallinity. Catalysts of the so-called third generation and their morphological properties are extensively dealt with. These catalysts give high yields and highly stereoregular polymers and enable simplification of polypropylene technology and energy saving. In the future polypropylene manufacturing will probably consist only of the polymerization steps with no need for centrifuging, extruding or another post-treatment.Es wird ein historischer Überblick der Entwicklung von Ziegler-Natta-Katalysatoren für die Propylenpolymerisation gegeben. Nach dem jahrelangen Einsatz von Titantrichlorid wurden in den 70er Jahren neue Katalysatoren der sogenannten zweiten Generation eingeführt, die schneller wirken und zu kristallineren Produkten führen. Ausführlich wird auf die neuere Entwicklung zu Katalysatoren der „dritten Generation”, speziell auf ihre morphologischen Eigenschaften eingegangen. Diese Katalysatoren ergeben sehr hohe Ausbeuten, sterisch sehr regelmßige Polymeren und eröffnen Möglichkeiten zur Vereinfachung der Polypropylentechnologie und Energieeinsparung. In Zukunft wird die Polypropylenherstellung nur aus der eigentlichen Polymerisationsstufe bestehen, und es wird keinerlei Nachbehandlung wie Zentrifugieren oder Extrudieren erforderlich sein.


Citations (2)


... The reactive end groups present on precursor polymers allow their utilization as platforms from which monomers can be polymerized or as linking groups which may react with other preformed polymer. For example, activated monomer (AM) polymerization91011 was used to produce polymers with terminal functional benzoin groups (Scheme 1.)121314. Such photoactive polymers can be used in the preparation of block copolymers of monomers with different chemical nature. ...

Reference:

Synthesis and Characterization of Block-Graft Copolymers [poly(epichlorohydrin-b-styrene)-g-poly(methyl methacrylate)] by Combination of Activated Monomer Polymerization, NMP and ATRP
Anew. Makromol. Chem.
  • Citing Article

... B9). The result showed that the polymer powders did not possess regular and specific shapes because the catalyst morphology can be considered as a template for polymer powder formation based on the replication phenomenon [56,57]. The changes in the catalyst composition like a higher ratio of CHC, reduction of CHC and decreased TEAl in the first step, and increased content of EDs did not significantly affect the morphology of polymer powder. ...

Advances in the Polymerization of Polyolefins with Coordination Catalysts
  • Citing Article
  • March 2003

Angewandte Makromolekulare Chemie