C2P2 - Research LCPP


C2P2

CPE Lyon
43 Bd du 11 Nov. 1918
69616 Villeurbanne cedex
FRANCE

  Chemistry, Catalysis, Polymers and Processes (UMR 5265)


RESEARCH > LCPP


POLYMERIZATION CHEMISTRIES

The specificity of the team LCPP is to develop researches on large-volume polymers as for instance polyolefins, polybutadiene, polyamides, silicones or PET. In order to perform these works, the laboratory has accumulated skills and knowledge in all polymerization chemistries and in particular in coordination catalysis since the 70’s. These chemistries are not only used as a tool for the design of polymers. New polymerization systems have been discovered in the laboratory allowing the emergence of original catalysts, polymers, polymerization processes or the preparation of high performance materials.

The major topics are:

A) Olefin polymerization by coordination catalysis

Homogeneous catalysts for diene-olefin copolymerization

Supported single site catalysts for olefin homo- and copolymerization

Heterogeneous multi-site Ziegler-Natta catalysts for olefin homo- and copolymerization

Polymerization kinetics – active site formation - catalyst particle fragmentation during the first instants of polymerization (stopped flow reactors)

B) Free radical polymerization of ethylene under mild conditions

Free radical polymerization of ethylene is studied under mild conditions of temperature (T < 100°C) and pressure (P < 250 bar). Polymerizations under slurry process conditions in organic solvents are envisaged as under emulsion process conditions in aqueous dispersed media yielding polyethylene latex. Homo- and copolymerizations of ethylene with polar vinyl monomers are investigated.

C) Innovative polymerization chemistries

In order to improve surface properties of polyolefins by incorporation of polar functions in their apolar backbone different strategies are envisaged combining free radical and coordination catalysis. This comes in various polymerization systems from successive polymerizations (see Macromolecular Architectures) to simultaneous hybrid free radical/catalytic polymerizations.

D) Polycondensation

Industrial polymers produced by polycondensation such as polyamide-66 or PET are obtained under harsh condition of pressure and temperature. At the opposite silicones elastomers are generated under very mild conditions. The laboratory in collaboration with the laboratory IMP (Ingénierie des Matériaux Polymères – UMR 5223) has developed specific devices (pilot reactors). Researches are focused on innovative catalysts for polyamides synthesis and non toxic catalysts for PET and silicon synthesis together with the development of high performance polyamides.

 

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