76
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Mahltig B, Gohy JF, Jérôme R, Buchhammer HM, Stamm M. Analogy in adsorption behavior of homopolyelectrolyte mixtures as compared to analogous diblock polyampholytes. ACTA ACUST UNITED AC 2002. [DOI: 10.1002/polb.10091] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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77
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Detrembleur C, Teyssié P, Jérôme R. Comments on and Updating of the Paper “Controlled Radical Polymerization of Methyl Methacrylate Mediated by 4-Methoxypyridine-N-oxide”. Macromolecules 2001. [DOI: 10.1021/ma010512d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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78
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Lou X, Detrembleur C, Lecomte P, Jérôme R. Living Ring-Opening (Co)polymerization of 6,7-Dihydro-2(5H)-oxepinone into Unsaturated Aliphatic Polyesters. Macromolecules 2001. [DOI: 10.1021/ma0019860] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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79
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Yin Z, Koulic C, Pagnoulle C, Jérôme R. Reactive Blending of Functional PS and PMMA: Interfacial Behavior of in situ Formed Graft Copolymers. Macromolecules 2001. [DOI: 10.1021/ma001798+] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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80
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Carlier V, Sclavons M, Jonas AM, Jérôme R, Legras R. Probing Thermoplastic Matrix−Carbon Fiber Interphases. 1. Preferential Segregation of Low Molar Mass Chains to the Interface. Macromolecules 2001. [DOI: 10.1021/ma000404b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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81
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Zune C, Archambeau C, Dubois P, Jérôme R. Effect of the solvent polarity on the living ligated anionic polymerization oftert-butyl methacrylate and copolymerization with methyl methacrylate. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/pola.1155] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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82
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Leclère P, Rasmont A, Brédas J, Jérôme R, Aimé J, Lazzaroni R. Phase-separated microstructures in “all-acrylic” thermoplastic elastomers. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/1521-3900(200103)167:1<117::aid-masy117>3.0.co;2-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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83
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Pagnoulle C, Jérôme R. Particle-in-particle morphology for the dispersed phase formed in reactive compatibilization of SAN/EPDM blends. POLYMER 2001. [DOI: 10.1016/s0032-3861(00)00437-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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84
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Koulic C, Yin Z, Pagnoulle C, Gilbert B, Jérôme R. Premade versus in situ formed compatibilizer at the PS/PMMA interface: contribution of the Raman confocal microscopy to the fracture analysis. POLYMER 2001. [DOI: 10.1016/s0032-3861(00)00553-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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85
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Rasmont A, Leclère P, Doneux C, Lambin G, Tong JD, Jérôme R, Brédas JL, Lazzaroni R. Microphase separation at the surface of block copolymers, as studied with atomic force microscopy. Colloids Surf B Biointerfaces 2000; 19:381-395. [PMID: 11064260 DOI: 10.1016/s0927-7765(00)00146-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Atomic force microscopy (AFM) is used to study the phase separation process occurring in block copolymers in the solid state. The simultaneous measurement of the amplitude and the phase of the oscillating cantilever in the tapping mode operation provides the surface topography along with the cartography of the microdomains of different mechanical properties. This technique thus allows to characterize the size and shape of those microdomains and their organization at the surface (e.g. cubic lattice spheres, hexagonal lattice of cylinders, or lamellae). In this study, a series of symmetric triblock copolymers made of a inner elastomeric sequence (poly(butadiene) or poly(alkylacrylate)) and two outer thermoplastic sequences (poly(methylmethacrylate)) is analyzed by AFM in the tapping mode. The microphase separation and their morphology are essential factors for the potential of these materials as a new class of thermoplastic elastomers. Special attention is paid to the control of the surface morphology, as observed by AFM, by the molecular structure of the copolymers (volume ratio of the sequences, molecular weight, length of the alkyl side group) and the experimental conditions used for the sample preparation. The molecular structure of the chains is completely controlled by the synthesis, which relies on the sequential living anionic polymerization of the comonomers. The copolymers are analyzed as solvent-cast films, whose characteristics depend on the solvent used and the annealing conditions. The surface arrangement of the phase-separated elastomeric and thermoplastic microdomains observed on the AFM phase images is discussed on the basis of quantitative information provided by the statistical analysis by Fourier transform and grain size distribution calculations.
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86
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Maquet V, Martin D, Malgrange B, Franzen R, Schoenen J, Moonen G, Jérôme R. Peripheral nerve regeneration using bioresorbable macroporous polylactide scaffolds. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 2000; 52:639-51. [PMID: 11033546 DOI: 10.1002/1097-4636(20001215)52:4<639::aid-jbm8>3.0.co;2-g] [Citation(s) in RCA: 111] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The ability of DRG-derived neurons to survive and attach onto macroporous polylactide (PLA) foams was assessed in vitro. The foams were fabricated using a thermally induced polymer-solvent phase separation. Two types of pore structures, namely oriented or interconnected pores, can be produced, depending on the mechanism of phase separation, which in turn can be predicted by the thermodynamics of the polymer-solvent pair. Coating of the porous foams with polyvinylalcohol (PVA) considerably improved the wettability of the foams and allowed for cell culture. The in vitro biocompatibility of the PVA-coated supports was demonstrated by measuring cell viability and neuritogenesis. Microscopic observations of the cells seeded onto the polymer foams showed that the interconnected pore networks were more favorable to cell attachment than the anisotropic ones. The capacity of highly oriented foams to support in vivo peripheral nerve regeneration was studied in rats. A sciatic nerve gap of 5-mm length was bridged with a polymer implant showing macrotubes of 100 microm diameter. At 4 weeks postoperatively, the polymer implant was still present. It was well integrated and had restored an anatomic continuity. An abundant cell migration was observed at the outer surface of the polymer implant, but not within the macrotubes. This dense cellular microenvironment was found to be favorable for axogenesis.
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87
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Detrembleur C, Mazza M, Lou X, Halleux O, Lecomte P, Mecerreyes D, Hedrick JL, Jérôme R. New Functional Aliphatic Polyesters by Chemical Modification of Copolymers of ε-Caprolactone with γ-(2-Bromo-2-methylpropionate)-ε-caprolactone, γ-Bromo-ε-caprolactone, and a Mixture of β- and γ-Ene-ε-caprolactone. Macromolecules 2000. [DOI: 10.1021/ma000488o] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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88
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Tong JD, Leclère P, Rasmont A, Brédas JL, Lazzaroni R, Jérôme R. Morphology and rheology of poly(methyl methacrylate)-block-poly(isooctyl acrylate)-block-poly(methyl methacrylate) triblock copolymers, and potential as thermoplastic elastomers. MACROMOL CHEM PHYS 2000. [DOI: 10.1002/1521-3935(20000801)201:12<1250::aid-macp1250>3.0.co;2-p] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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89
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Abraham T, Giasson S, Gohy JF, Jérôme R, Müller B, Stamm M. Adsorption Kinetics of a Hydrophobic−Hydrophilic Diblock Polyelectrolyte at the Solid−Aqueous Solution Interface: A Slow Birth and Fast Growth Process. Macromolecules 2000. [DOI: 10.1021/ma991207j] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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90
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Lecomte P, Detrembleur C, Lou X, Mazza M, Halleux O, Jérôme R. Novel functionalization routes of poly(ε-caprolactone). ACTA ACUST UNITED AC 2000. [DOI: 10.1002/1521-3900(200007)157:1<47::aid-masy47>3.0.co;2-b] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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91
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Mecerreyes D, Humes J, Miller RD, Hedrick JL, Detrembleur C, Lecomte P, Jérôme R, San Roman J. First example of an unsymmetrical difunctional monomer polymerizable by two living/controlled methods. Macromol Rapid Commun 2000. [DOI: 10.1002/1521-3927(20000701)21:11<779::aid-marc779>3.0.co;2-x] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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92
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Moussaif N, Pagnoulle C, Jérôme R. Reactive compatibilization of PC/PVDF polymer blends by zinc carboxylate containing poly(methylmethacrylate) ionomers. POLYMER 2000. [DOI: 10.1016/s0032-3861(99)00783-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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93
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Mahltig B, Gohy JF, Jérôme R, Bellmann C, Stamm M. Adsorption of block polyampholyte micelles in monolayers at the silicon water interface. Colloid Polym Sci 2000. [DOI: 10.1007/s003960050547] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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94
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Fallais I, Pantoustier N, Devaux J, Zune C, Jérôme R. Anionic synthesis of cyclic anhydride end-capped poly(methyl methacrylate). POLYMER 2000. [DOI: 10.1016/s0032-3861(99)00871-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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95
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Luzinov I, Pagnoulle C, Jérôme R. Dependence of phase morphology and mechanical properties of PS/SBR/PE ternary blends on composition: transition from core–shell to triple-phase continuity structures. POLYMER 2000. [DOI: 10.1016/s0032-3861(99)00514-5] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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96
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Stassin F, Halleux O, Dubois P, Detrembleur C, Lecomte P, Jérôme R. Ring opening copolymerization ofɛ-caprolactone,γ-(triethylsilyloxy)-ɛ-caprolactone andγ-ethylene ketal-ɛ-caprolactone: a route to hetero-graft copolyesters. ACTA ACUST UNITED AC 2000. [DOI: 10.1002/1521-3900(200003)153:1<27::aid-masy27>3.0.co;2-n] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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97
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dos Santos D, Kogej T, Brédas J, Boutton C, Hendrickx E, Houbrechts S, Clays K, Persoons A, Xhang J, Dubois P, Jérôme R. Novel functionalized oligo-vinylthiophene molecules with modulated second-order nonlinear optical response. J Mol Struct 2000. [DOI: 10.1016/s0022-2860(99)00437-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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98
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Martinot L, Leroy D, Zhan H, Licour C, Jérôme C, Chapelle G, Calberg C, Jérôme R. The use of conducting polymers as cathodes for the electrochemical deposition of magnetic transition metal/rare earth alloys. ACTA ACUST UNITED AC 2000. [DOI: 10.1039/a908305g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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99
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Tong JD, Moineau G, Leclère P, Brédas, Lazzaroni R, Jérôme R. Synthesis, Morphology, and Mechanical Properties of Poly(methyl methacrylate)-b-poly(n-butyl acrylate)-b-poly(methyl methacrylate) Triblocks. Ligated Anionic Polymerization vs Atom Transfer Radical Polymerization. Macromolecules 1999. [DOI: 10.1021/ma990886v] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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100
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Detrembleur C, Mazza M, Halleux O, Lecomte P, Mecerreyes D, Hedrick JL, Jérôme R. Ring-Opening Polymerization of γ-Bromo-ε-caprolactone: A Novel Route to Functionalized Aliphatic Polyesters. Macromolecules 1999. [DOI: 10.1021/ma991083a] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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