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E u r o S c i C o n C o n f e r e n c e o n
Chemistry
2018
Chemistry 2018
Journal of Organic & Inorganic Chemistry
ISSN 2472-1123
F e b r u a r y 1 9 - 2 0 , 2 0 1 8
P a r i s , F r a n c e
Page 17
In the present work, the synthesis of iPS is realized by homogeneous catalytic
styrene polymerization on a MAO-activated titanium bisphenolate catalyst, in
the presence of a non-conjugated diene acting as chain transfer agent (CTA)
leading to vinyl-terminated iPS (vinyl-iPS). The polymerization of styrene, with
the same catalyst, was also achieved in a cascade of two parallel reactors.
Whereas ultra-high-molecular-weight (UHMW) iPS is formed in the absence of
the diene, the molar mass Mw decreases with increasing diene/styrene molar
ratio. Hence, the contents of iPS and UHMWiPS are varied without affecting
the average molar mass of both blend components. The same catalytic
system was tested for the coordination polymerization of p-methyl styrene.
Vinyl-iPS revealed also a highly efficient CTA for the ring-opening metathesis
polymerization (ROMP) of cis-cyclooctene, producing polycyclooctene-block-
isotactic polystyrene (PCO-b-iPS) as amorphous and semi-crystalline rubber
diblock copolymers. Furthermore, crystalline nanostructured inorganic-
organic hybrid materials containing isotactic iPS were prepared by means
of hydrosilylation coupling of vinyl-iPS with octakis(dimethylsilyloxy)
silsesquioxane (Q8M8H). As a function of the iPS/Q 8M8H molar ratio, the
formation of linear or star-shaped hybrid architectures is achieved.
Biography
Pierre-J Lutz is a Professor (Directeur de Recherche Emerite,
CNRS) of Polymer Chemistry in Strasbourg. He completed his
PhD in Macromolecular Engineering in 1981 from University
Strasbourg, France. (supervision P. Rempp). Chargé de Recher-
che (1981), ICS, (CNRS) postdoc (Prof. H. J. Cantow, Freiburg
(Germany). In 1988, he spent a sabbatical year at the Institute
of Macromolecular Chemistry, in Freiburgwith Prof. WBurchard
as Humboldt Visiting Scientist. In 1996, he was nominated as
Directeur de Recherche at the ICS (CNRS-University of Stras-
bourg). His recent scientific interests are concerned with vari-
ous polymerization processes structural characterization. From
2012-2015, University of Jena (Germany) (Prof. U. S. Schubert),
University of Freiburg (Prof. R. Mülhaupt). Since 2017 Directeur
de Recherche Emérite (CNRSHe); has authored more than 170
publications and book chapters and 3 patents. He is a member
of the French Polymer Group and the French Chemical Society.
He was amember of the American Chemical Society until 2014.
His research interests include polymer chemistry- polymers of
controlled molecular and structural parameters via ionic po-
lymerization and their characterization; functional homo (or
co) polymers including macromonomers, branched polymers,
cross-linked polymers, and cyclic polymers (via coordination,
living anionic polymerization); complex macromolecular archi-
tectures; grafting reactions; self-assembly of block copolymers
and; hydrogels designed for biomedical applications. In partic-
ular his interests lies in poly(ethylene oxide) (PEO) and related
materials designed for biomedical applications; synthesis and
characterization of polyethylenes of various molecular architec-
tures and; more recently hybrid polymeric materials.
From isotactic polystyrene (iPS) or poly(p-methyl styrene) to
semicrystalline iPS / POSS hybrid materials
Pierre-J Lutz1, 2, MaximilianVielhauer1, 2, Felix Kirschvink1,
Luis Valencia1, 2, Christian Friedrich1, Günter Reiter1 and Rolf
Mülhaupt 1
1University of Freiburg, Germany
2University of Strasbourg, CNRS, France
Pierre-J Lutz, J Org Inorg Chem 2018, Volume: 4
DOI: 10.21767/2472-1123-C1-002