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Polymer Chemistry 2018
Polymer Sciences
ISSN: 2471-9935
Page 70
March 26-28, 2018
Vienna, Austria
3
rd
Edition of International Conference and Exhibition on
Polymer Chemistry
M
any useful polymers as polynorbornene (PNb) or
polydicyclopentadiene(PDCPD),havinginterestingapplications
as optical components, high impact thermosets or shock absorbers,
are prepared by ring-opening metathesis polymerization (ROMP).
However,theairsensitivityandthelackofprocessabilityofthemetal-
based catalysts used for ROMP is a drag for their implementation at
industrial scale. Nevertheless,
in situ
generation/activation of ROMP
catalysts employing stimuli like temperature, pH or UV irradiation
can palliate this drawback. Among them, photoactivable ROMP
catalysts are certainly the most interesting and have often relied on
a ligand dissociation/rearrangement under UV light. In this project,
we propose an alternative pathway to generate active ruthenium
complexes under UV light. The latter employs photosensitive
imidazolium salts to generate N-heterocyclic carbene (NHC) under
irradiation that can be subsequently employed as ligands. As
such, when associated with the inactive [RuCl
2
(p-cymene)]
2
dimer,
the system allows the formation of the Noels’ catalyst RuCl
2
(p-
cymene)(NHC)
in situ
under UV light. Polymer latexes, commonly
synthesized by emulsion polymerization, have high industrial
interest. However, few contributions have been reported regarding
polymer latexes obtained by ROMP, first due to the high sensitivity
of the active species involved and also because of difficulties to
mix ROMP initiators and monomers without causing a premature
polymerization. The use of photolatent catalytic systems permit to
let go off these drawbacks and can afford a new range of polymer
latex by ROMP which cannot be prepared by other routes. In this
contribution, the synthesis of PNb by ROMP with two photolatent
catalytic systems will be first presented. Then this strategy will be
transferred in miniemulsion conditions to prove the ability of this
system to form PNb latexes.
Recent Publications
1. Pichavant, L., López-González, M.J., Favereaux, A., Héroguez, V.
(2018) Thermosensitive polynorbornene poly(ethylene oxide)
nanoparticles loaded with oligoDNAs: An innovative approach for
acting on cancer-associated pain. Polymer Chemistry 9(3): 362-371
2. Pinaud J., Trinh T.K.H., Sauvanier D., Placet E., Songsee S.,
Lacroix-Desmazes P., Becht J.M., Tarablsi B., Lalevée J., Pichavant
L., Héroguez V., Chemtob A. (2018)
In Situ
Generated Ruthenium-
Arene Catalyst for Photoactivated Ring-Opening Metathesis
Polymerization Through Photolatent N-Heterocyclic Carbene
Ligand. Chemistry A European Journal 24(2): 337-341
3. Pichavant, L., Carrié, H., Durrieu, M.C., Héroguez, V. (2016)
Nanoparticles highly loaded with gentamicin sulfate by a
combination of polyhydroxylated macromonomers and ROMP for
the synthesis of bioactive biomaterials. Polymer Chemistry 7(45):
7019-7028
4. Cao, E., Pichavant, L., Prouzet, E., Héroguez, V. (2016) The
formation and study of poly(ethylene oxide)-poly(norbornene)
block-copolymers on the surface of titanium-dioxide particles: A
novel approach towards application of si-ROMP to larger surface
modification. Polymer Chemistry 7(15):2751-2758
5. Pichavant, L., Carrié, H., Nguyen, M.N., Plawinski, L., Durrieu, M.C.,
Héroguez, V. (2016) Vancomycin Functionalized Nanoparticles for
Bactericidal Biomaterial Surfaces. Biomacromolecules 17(4):1339-
1346
Biography
Loïc Pichavant is a Post-doctoral Researcher at the Laboratoire de Chimie
des Polymères Organiques (LCPO) at the University of Bordeaux (France)
since 2010. His research interests deal with the formation of nano-objects
by ring-opening metathesis polymerization in dispersed media (dispersion;
miniemulsion) of cyclo-olefins and their use in biomedical applications (na-
no-carriers; drug delivery systems). He obtained a PhD Degree in 2009 from
the University of Reims Champagnes-Ardennes, working on the synthesis of
new biosourced monomers and their polymerization by photoinitiated free
radical polymerization.
Loic.pichavant@enscbp.frNovel polymer latexes by photoactivated ring-opening
metathesis polymerization in miniemulsion via the in situ
generation of ruthenium-arene catalyst through photolatent
N-heterocyclic carbene ligand
Loïc Pichavant
1
, Thi Kim Hoang Trinh
2
, David Sauvanier
3
, Emeline Placet
3
,
Sriprapai Songsee
3
, Patrick Lacroix-Desmazes
3
, Jean-Michel Becht
2
, Bassam
Tarablsi
2
, Jacques Lalevée
2
, Abraham Chemtob
2
, Julien Pinaud
1
and
Valérie
Héroguez
3
1
Université de Bordeaux, France
2
Université de Haute-Alsace, France
3
ICGM Université de Montpellier, France
Loïc Pichavant et al., Polym Sci, Volume 4
DOI: 10.4172/2471-9935-C1-008