References of "Lecomte, Philippe"
     in
Bookmark and Share    
See detailγ-bromo-ε-caprolactone, a versatile lactone for the synthesis of new functional aliphatic polyesters
D'Aloia, Violetta; Gautier, Sandrine; Halleux, Olivier et al

Poster (2000, May 02)

Detailed reference viewed: 28 (2 ULg)
Full Text
Peer Reviewed
See detailRing opening copolymerization of ε-caprolactone, γ-(triethylsilyloxy)-ε-caprolactone and γ-ethylene ketal-ε-caprolactonelactone: a route to hetero-graft copolyesters
Stassin, Fabrice; Halleux, Olivier; Dubois, Philippe ULg et al

in Macromolecular Symposia (2000), 153

ε-Caprolactone (ε-CL) has been copolymerized with two precursors of γ-hydroxy-ε-CL, i.e., γ-ethylene ketal-ε-caprolactone (TOSUO) and γ-(triethylsilyloxy)-ε-caprolactone (TeSCL). The triethylsilyloxy ... [more ▼]

ε-Caprolactone (ε-CL) has been copolymerized with two precursors of γ-hydroxy-ε-CL, i.e., γ-ethylene ketal-ε-caprolactone (TOSUO) and γ-(triethylsilyloxy)-ε-caprolactone (TeSCL). The triethylsilyloxy pendant groups can be selectively deprotected into hydroxyl groups followed by the deprotection of the acetal substituents. Each series of hydroxyl groups can be used to initiate the polymerization of cyclic monomers so leading to hetero-graft copolyesters with, for instance, poly-ε-CL and polylactide grafts. [less ▲]

Detailed reference viewed: 37 (4 ULg)
Full Text
Peer Reviewed
See detailRing-Opening Polymerization of γ-bromo-ε-caprolactone : A novel route to functionalized aliphatic polyesters
Detrembleur, Christophe ULg; Mazza, Michaël; Halleux, Olivier et al

in Macromolecules (2000), 33(1), 14-18

The synthesis, characterization, and polymerization of a new cyclic ester, gamma-bromo-epsilon-caprolactone (gamma-BrCL), are reported. The ring-opening polymerization (ROP) of this new monomer initiated ... [more ▼]

The synthesis, characterization, and polymerization of a new cyclic ester, gamma-bromo-epsilon-caprolactone (gamma-BrCL), are reported. The ring-opening polymerization (ROP) of this new monomer initiated from Al((OPr)-Pr-i)(3) as initiator in toluene at 0 degrees C was found to be living and proceeds by a coordination-insertion mechanism. Random and block copolymerizations of this gamma-BrCL with epsilon-caprolactone (epsilon-CL) were also found to be living as evidenced by the experimental molecular weight which is consistent with that expected from the monomer to initiator molar ratio, the narrow polydispersity, and the good agreement between the comonomers molar fraction in the comonomer feed and the copolymer. The thermal transitions (Tg and Tm) in the epsilon-CL/gamma-Br-CL random copolymers depend strongly on the gamma-BrCL content. Increasing the gamma BrCL content in the copolymer [F(BrCL)] increased the Tg of the copolymer from -61 degrees C for poly(epsilon-caprolactone) to -16.5 degrees C for the poly( gamma-BrCL) homopolymer but decreased the Tm of the PCL to contents of similar to 30 mol % of gamma BrCL [F(BrCL) =0.3]Beyond this value, the copolymers were found to be amorphous and exist as viscous liquids. [less ▲]

Detailed reference viewed: 68 (8 ULg)
Full Text
See detailSynthesis of new hydrophilic γ-substituted poly(ε-caprolactone)s
Lecomte, Philippe ULg; D'aloia, Violetta; Mazza, Michaël et al

in Polymer Preprints (2000), 41(2), 1534-1535

Detailed reference viewed: 14 (1 ULg)
Full Text
Peer Reviewed
See detailNovel functionalization routes of poly(ε-caprolactone)
Lecomte, Philippe ULg; Detrembleur, Christophe ULg; Lou, Xudong et al

in Macromolecular Symposia (2000), 157

The aluminum alkoxide mediated ring opening polymerization of functional lactones, such as γ-ethylene ketal-ε-caprolactone (TOSUO), γ-(triethylsilyloxy)-ε-caprolactone (SCL) and γ-bromo-ε-caprolactone ... [more ▼]

The aluminum alkoxide mediated ring opening polymerization of functional lactones, such as γ-ethylene ketal-ε-caprolactone (TOSUO), γ-(triethylsilyloxy)-ε-caprolactone (SCL) and γ-bromo-ε-caprolactone (γBrCL), is a versatile route to polyesters containing ketal, ketone, alcohol and bromide groups. As result of living polyaddition mechanism, random and block copolymerization of εCL and γBrCL has been successfully carried out. The reactivity ratios are quite similar (1.08 for ε-CL, and 1.12 for γBrCL). These random copolymers are semicrystalline when they contain less than 30 mol% of γBrCL, otherwise they are amorphous. No transesterification reaction occurs during the sequential polymerization of ε-CL and γBrCL leading to block copolymers. Reaction of poly(εCL-co-γBrCL) with pyridine provides quantitatively a polycationic polyester. Furthermore, the reaction of this random copolymer with l,8-diazabicyclo[5.4.0] undec-7-ene (DBU) is a route to unsaturated polyesters, whose the non conjugated double bonds can be quantitatively converted into epoxides by reaction with m-chloroperbenzoic acid (mCPBA). No chain degradation is detected during these derivatization reactions of poly (εCL-co-γBrCL). [less ▲]

Detailed reference viewed: 60 (10 ULg)
Full Text
Peer Reviewed
See detailRing-opening metathesis polymerization of new alpha-norbornenyl poly(epsilon-caprolactone) macromonomers
Mecerreyes, David; Dahan, Dahan; Lecomte, Philippe ULg et al

in Journal of Polymer Science. Part A, Polymer Chemistry (1999), 37(14), 2447-2455

Poly(epsilon-caprolactone) (PCL) macromonomers capped by a polymerizable norbornene end-group have been synthesized and (co)polymerized by ring-opening metathesis with formation of graft copolymers and ... [more ▼]

Poly(epsilon-caprolactone) (PCL) macromonomers capped by a polymerizable norbornene end-group have been synthesized and (co)polymerized by ring-opening metathesis with formation of graft copolymers and polymacromonomers. -Norbornenyl PCL macromonomers have been synthesized by ring opening polymerization (ROP) of epsilon-caprolactone (CL) initiated by 2-diethylaluminoxymethyl-5-norbornene. Copolymerization of these PCL macromonomers with norbornene and polymerizable derivatives has been catalyzed by the [RuCl2(p-cymene)]2 PCy3/(trimethylsilyl)diazomethane complex yielding a series of poly(norbornene)-graft-poly(epsilon-caprolactone) copolymers. These new graft copolymers have been characterized by a set of analytical methods, i.e., SEC, 1H-NMR, FTIR, DSC, and TGA. Furthermore, PCL macromonomers have been polymerized into high molecular weight comb chains of narrow molecular weight distribution (Mw/Mn = 1.10) within high yields (90%). [less ▲]

Detailed reference viewed: 34 (5 ULg)
Full Text
See detailSynthesis of polynorbornene grafted with poly(ε-caprolactone) by sequential controlled ring opening polymerization
Lecomte, Philippe ULg; Mecerreyes, David; Dubois, Philippe et al

Poster (1999, April 12)

Detailed reference viewed: 9 (0 ULg)
Full Text
Peer Reviewed
See detail4-Methoxypyridine N-Oxide: a new regulator for the controlled free radical polymerization of methyl methacrylate
Detrembleur, Christophe ULg; Lecomte, Philippe ULg; Caille, Jean-Raphaël et al

in Macromolecules (1998), 31(20), 7115-7117

Detailed reference viewed: 42 (11 ULg)
Full Text
See detailProcess for radical controlled polymerization or copolymerization of (meth)acryl and vinyl monomers and thus prepared (co)polymers
Lecomte, Philippe ULg; Dubois, Philippe; Jérôme, Robert ULg et al

Patent (1998)

This process is characterized by the fact that at least one of the said monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension, at a temperature that can be as low as 0 DEG C ... [more ▼]

This process is characterized by the fact that at least one of the said monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension, at a temperature that can be as low as 0 DEG C., in the presence of an initiation system including: at least one compound generating radicals, other than bromofluorene, and at least one catalyst consisting of a complex of palladium in the 0 oxidation state, denoted by the following formula (I): Pd(0)L1L2L3L4 in which each of L1, L2, L3 and L4, which are identical or different, denotes a ligand which may be a chiral ligand, which is chosen from PRR'R'', P(OR)(OR')(OR''), NRR'R'', ORR', SRR', SeRR', AsRR'R'', SbRR'R'', where each of R, R' and R'' independently denotes a C1-C14 alkyl group, optionally substituted, or an optionally substituted aromatic group, it being possible for at least two of these ligands to be joined to one another by one or more divalent radicals. [less ▲]

Detailed reference viewed: 6 (1 ULg)
See detailMethod for controlled radical polymerisation
Jérôme, Robert ULg; Creutz, Serge; Dubois, Philippe et al

Patent (1998)

The invention concerns a method for making a polymer or a copolymer by radical polymerisation of at least one unsaturate monomer in the presence of a stabiliser whereby a stabiliser complying with general ... [more ▼]

The invention concerns a method for making a polymer or a copolymer by radical polymerisation of at least one unsaturate monomer in the presence of a stabiliser whereby a stabiliser complying with general formula (I) is used in which the substituents (Z)m, (R)n and Y can have different values. [less ▲]

Detailed reference viewed: 5 (2 ULg)
Full Text
See detailMethod of free radical polymerization of copolymerization of (meth)acrylic and vinyl monomers under control and (co)polymer produced thereby
Lecomte, Philippe ULg; Dubois, Philippe; Jérôme, Robert ULg et al

Patent (1998)

PROBLEM TO BE SOLVED: To obtain a (co)polymer excellent in resistance to thermal decomposition by polymerizing or copolymerizing a monomer or monomers in the presence of an initiation system contg. a free ... [more ▼]

PROBLEM TO BE SOLVED: To obtain a (co)polymer excellent in resistance to thermal decomposition by polymerizing or copolymerizing a monomer or monomers in the presence of an initiation system contg. a free-radical generator other than a bromoolefin and a catalyst comprising a Pd complex having an oxidation number of 0 and represented by a specific formula. SOLUTION: A Pd salt (e.g. Pd acetate), a ligand (e.g. triphenylphosphine), and a solvent (e.g. toluene) are charged into a reactor to form a Pd complex having an oxidation number of 0 and represented by the formula: Pd(0)L<1> L<2> L<3> L<4> [wherein L<1> to L<4> are each a ligand such as PRR'R'' (wherein R, R', and R'' are each 1-14C alkyl, etc.)]. Then, a monomer (e.g. methyl methacrylate) is added to the reactor followed by the addition of a free-radical generator (e.g. CCl4 ) in a molar ratio of Pd to the generator of 0.01-100.; The contents in the reactor are heated to 40-90 deg.C and stirred for a certain time to conduct the polymn. The reaction mixture is diluted with toluene, etc., filtered, and condensed under a reduced pressure. The resultant polymer soln. is poured into methanol, etc., and the resultant precipitate is filtered, washed, and dried to give a polymer having a number average mol.wt. of 400-10,000,000g/mol and a polydispersity lower than 2. [less ▲]

Detailed reference viewed: 47 (2 ULg)
Full Text
See detailMethod for controlled radical polymerization
Jérôme, Robert ULg; Creutz, Serge; Dubois, Philippe et al

Patent (1998)

The invention concerns a method for making a polymer or a copolymer by radical polymerisation of at least one unsaturate monomer in the presence of a stabiliser whereby a stabiliser complying with general ... [more ▼]

The invention concerns a method for making a polymer or a copolymer by radical polymerisation of at least one unsaturate monomer in the presence of a stabiliser whereby a stabiliser complying with general formula (I) is used in which the substituents (Z)m, (R)n and Y can have different values. [less ▲]

Detailed reference viewed: 21 (7 ULg)
Full Text
See detailProcess for radical controlled polymerization or copolymerization of (meth)acryl and vinyl monomers and thus prepared (co)polymers
Lecomte, Philippe ULg; Dubois, Philippe; Jérôme, Robert ULg et al

Patent (1998)

A process for a radical-controlled polymerisation or co-polymerisation of (meth)acrylic and/or vinylic monomers is effected en masse, solution, emulsion or suspension at a temperature which may be as low ... [more ▼]

A process for a radical-controlled polymerisation or co-polymerisation of (meth)acrylic and/or vinylic monomers is effected en masse, solution, emulsion or suspension at a temperature which may be as low as 0 degrees C, in the presence of a system comprising (i) a radical generator compound other than bromofluorene; and (ii) a catalyst consisting of a Pd complex of degree of oxidation zero, corresponding to formula Pd(0)L<1>L<2>L<3>L<4> (I), where L<1>-L<4> = ligand (possibly chiral) chosen from PRR<1>R<2>, P(OR)(OR<1>)(OR<2>), NRR<1>R<2>, ORR<1>, SRR<1>, SeRR<1>, AsRR<1>R<2> and SbRR<1>R<2>; and R, R<1>, R<2> = 1-14C alkyl (optionally substituted) or aromatic (optionally substituted), at least two of the ligands being capable of interconnecting with one or more bivalent radicals. [less ▲]

Detailed reference viewed: 16 (2 ULg)
Full Text
See detailProcess for radical controlled polymerization or copolymerization of (meth)acryl and vinyl monomers and thus prepared (co)polymers
Lecomte, Philippe ULg; Dubois, Philippe; Jérôme, Robert ULg

Patent (1998)

A process for a radical-controlled polymerisation or co-polymerisation of (meth)acrylic and/or vinylic monomers is effected en masse, solution, emulsion or suspension at a temperature which may be as low ... [more ▼]

A process for a radical-controlled polymerisation or co-polymerisation of (meth)acrylic and/or vinylic monomers is effected en masse, solution, emulsion or suspension at a temperature which may be as low as 0 degrees C, in the presence of a system comprising (i) a radical generator compound other than bromofluorene; and (ii) a catalyst consisting of a Pd complex of degree of oxidation zero, corresponding to formula Pd(0)L<1>L<2>L<3>L<4> (I), where L<1>-L<4> = ligand (possibly chiral) chosen from PRR<1>R<2>, P(OR)(OR<1>)(OR<2>), NRR<1>R<2>, ORR<1>, SRR<1>, SeRR<1>, AsRR<1>R<2> and SbRR<1>R<2>; and R, R<1>, R<2> = 1-14C alkyl (optionally substituted) or aromatic (optionally substituted), at least two of the ligands being capable of interconnecting with one or more bivalent radicals. [less ▲]

Detailed reference viewed: 12 (2 ULg)
Full Text
See detailProcess for radical controlled polymerization or copolymerization of (meth)acryl and vinyl monomers and thus prepared (co)polymers
Lecomte, Philippe ULg; Dubois, Philippe; Jérôme, Robert ULg et al

Patent (1998)

A process for a radical-controlled polymerisation or co-polymerisation of (meth)acrylic and/or vinylic monomers is effected en masse, solution, emulsion or suspension at a temperature which may be as low ... [more ▼]

A process for a radical-controlled polymerisation or co-polymerisation of (meth)acrylic and/or vinylic monomers is effected en masse, solution, emulsion or suspension at a temperature which may be as low as 0 degrees C, in the presence of a system comprising (i) a radical generator compound other than bromofluorene; and (ii) a catalyst consisting of a Pd complex of degree of oxidation zero, corresponding to formula Pd(0)L<1>L<2>L<3>L<4> (I), where L<1>-L<4> = ligand (possibly chiral) chosen from PRR<1>R<2>, P(OR)(OR<1>)(OR<2>), NRR<1>R<2>, ORR<1>, SRR<1>, SeRR<1>, AsRR<1>R<2> and SbRR<1>R<2>; and R, R<1>, R<2> = 1-14C alkyl (optionally substituted) or aromatic (optionally substituted), at least two of the ligands being capable of interconnecting with one or more bivalent radicals. [less ▲]

Detailed reference viewed: 14 (3 ULg)
Full Text
Peer Reviewed
See detailSynthesis of poly(norbornene-g-ε-caprolactone) copolymers by sequential controlled ring opening polymerization
Lecomte, Philippe ULg; Mecerreyes, David; Dubois, Philippe ULg et al

in Polymer Bulletin (1998), 40(6), 631-638

Poly(norbornene-g-ε-caprolactone) copolymers have been prepared by the "grafting from" technique. Well controlled polynorbornene containing 5% acetate pendant groups has been firstly synthesized by ... [more ▼]

Poly(norbornene-g-ε-caprolactone) copolymers have been prepared by the "grafting from" technique. Well controlled polynorbornene containing 5% acetate pendant groups has been firstly synthesized by ruthenium complex-mediated ring opening metathesis polymerization. The acetate groups have been derivatized into aluminum alkoxides by hydrolysis into alcohol followed by reaction of the alcohol with triethylaluminum. The two polymerization steps are under complete control, so that graft copolymers have been synthesized with a narrow molecular weight distribution and are free from any detectable traces of the parent homopolymers as stated by selective fractionation experiments. These original copolymers have been characterized by SEC, FTIR, 1H NMR, DSC, TGA. [less ▲]

Detailed reference viewed: 41 (2 ULg)
Full Text
See detail(Meth)acrylates pseudo-living radical polymerization in the presence of transition metal complexes: the Kharasch reaction revisited
Granel, Claude; Moineau, George; Lecomte, Philippe ULg et al

in Polymer Preprints (1997), 38(1), 450-451

Detailed reference viewed: 15 (1 ULg)