Synthesis and study of poly(ethylene oxide) membranes obtained from homopolymerization of peo macromonomers

Schmitt, Bertrand; Alexandre, Eliane; Boudjema, K.; Lutz, P.

doi:10.1002/masy.19950930116

Cited by 8 publications

(9 citation statements)

References 8 publications

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“… g) Hydrogels prepared by polymerization of bifunctional PEO macromonomers in water (molar mass of macromonomer precursors 3 000, 6 500 and 11 500 g · mol −1 (source ref. 28). …”

Section: Resultsmentioning

confidence: 99%

“…They call for following comments: Glucose diffuses also through PEO‐star hydrogels obtained by irradiation. The values of the diffusion coefficients can be related directly to the structural parameters of the networks (preparation conditions, irradiation dose). For pure POE hydrogels, diffusion is more affected by the initial PEO concentration than the irradiation dose. The data were compared to values obtained for PEO macromonomer based hydrogels 18,28. For PEO‐star hydrogels, the highest relative diffusion coefficient is close to 0.55 better than for macromonomer based hydrogels.…”

Section: Resultsmentioning

confidence: 99%

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Hydrogel Networks of Poly(ethylene oxide) Star‐Molecules Supported by Expanded Polytetrafluoroethylene Membranes: Characterization, Biocompatibility Evaluation and Glucose Diffusion Characteristics

Alexandre¹,

Schmitt

Boudjéma

et al. 2004

Macromolecular Bioscience

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The present work discusses the grafting by electron beam irradiation of poly(ethylene oxide) (PEO) star-shaped polymers onto porous expanded polytetrafluoroethylene (EXPTFE) surfaces. The resulting materials are intended to combine the good biocompatible properties of PEO with the outstanding mechanical properties of PTFE. The star-shaped PEOs were synthesized via anionic polymerization. 3 Mev electron beam irradiation was applied to graft these PEO stars onto porous EXPTFE surfaces. The hydrophobic EXPTFE surface had to be pre-modified with N-vinylpyrrolidone. ESCA was used to quantify the amount of grafted star-shaped PEO. Unmodified EXPTFE surfaces are well known, when implanted in a body, to be rapidly covered by a layer of cells and fibrin. The EXPTFE coated with PEO were implanted in the peritoneal cavity of rats (or under the back skin). This implantation did not induce any inflammation reactions and SEM analysis had attested the absence of adsorbed cells and fibrin. The glucose diffusion properties of these membranes were studied by a lag time analysis method and compared to those of pure PEO hydrogels. As expected, glucose diffuses through the hydrogel coated membrane and diffusion is not affected by the presence of the EXPTFE membrane.

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“… g) Hydrogels prepared by polymerization of bifunctional PEO macromonomers in water (molar mass of macromonomer precursors 3 000, 6 500 and 11 500 g · mol −1 (source ref. 28). …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Hydrogel Networks of Poly(ethylene oxide) Star‐Molecules Supported by Expanded Polytetrafluoroethylene Membranes: Characterization, Biocompatibility Evaluation and Glucose Diffusion Characteristics

Alexandre¹,

Schmitt

Boudjéma

et al. 2004

Macromolecular Bioscience

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“…Extending this work, hydrogels were also prepared by the homopolymerization of PEO-b-PDXL-b-PEO macromonomers. [108] Networks with functional hydroxyl groups were prepared by copolymerizing a,o-difunctional PEO macromonomers with small amounts of PEO star polymers, in which the outer ends of the arms are partially functionalized with polymerizable groups, and the rest of them are functionalized with hydroxyl groups, [109,110] These networks are illustrated in Scheme 20.…”

Section: Complex Architectures Using Homopolymerizable Macromonomersmentioning

confidence: 99%

The Strength of the Macromonomer Strategy for Complex Macromolecular Architecture: Molecular Characterization, Properties and Applications of Polymacromonomers

Hadjichristidis

Pitsikalis

Iatrou

et al. 2003

Macromol. Rapid Commun.

219

209

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The efficiency of the macromonomer (MM) synthetic strategy for the creation of nonlinear complex macromolecular architectures (miktoarm stars, α,ω‐branched polymers, random/exact comb and graft copolymers, dendritic polymers, molecular brushes) is reviewed. In addition, the solution/bulk properties and the potential applications of polymacromonomers (PMM), as well as new synthetic ideas are presented. The synthesis of macromonomers and living polymacromonomers in situ leads to many novel linear and nonlinear structures, as for example PMM‐b‐PS‐b‐PMM, (PS)2PMM. The use of multichlorosilylstyrenes as monomer/linking agents opens new ways for structures with multichain macromonomeric building blocks.The use of multichlorosilylstyrenes as monomer/linking agents opens new ways for structures having multichain macromonomeric building blocks.magnified imageThe use of multichlorosilylstyrenes as monomer/linking agents opens new ways for structures having multichain macromonomeric building blocks.

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“…The reaction cannot be conducted in water. A third approach to design PEO hydrogels has been developed over the years: free radical homopolymerization or photopolymerization of bifunctional PEO macromonomers [5,6]. The reaction is easy to perform and gives direct access to hydrogels in water [7] or even in physiological medium [8].…”

Section: Introductionmentioning

confidence: 99%

From free radical to atom transfer radical polymerization of poly(ethylene oxide) macromonomers in nanostructured media

Buathong¹,

Peruch²,

Isel³

et al. 2004

Designed Monomers and Polymers

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Abstract-Polymerization of bifunctional α,ω-methacryloyloxypoly(ethylene oxide) (PEO) macromonomers was performed in water (or in organic solvents) via free radical or Atom Transfer Radical Polymerization (ATRP). Rapid cross-linking was observed when the reaction was conducted at 60 • C via classical free radical polymerization with potassium peroxodisulfate as initiator. ATRP also yielded hydrogels, but the system was much more complex. In both cases, the characteristics of the resulting hydrogels (amount of extractable material, equilibrium swelling degree and uniaxial compression modulus) were studied. They depend on several parameters (precursor molar mass, macromonomer concentration, polymerization time and nature of the initiating system). The hydrogels obtained by ATRP are characterized by higher amounts of extractable materials and exhibit rather poor mechanical properties. Regardless of the polymerization process (free radical or ATRP), far better results were obtained when the reaction was conducted in water. In fact, in aqueous media, the hydrophobic end-standing polymerizable methacrylic units of the macromonomers self-organize, after which gel formation takes place much more rapidly.

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Synthesis and study of poly(ethylene oxide) membranes obtained from homopolymerization of peo macromonomers

Cited by 8 publications

References 8 publications

Hydrogel Networks of Poly(ethylene oxide) Star‐Molecules Supported by Expanded Polytetrafluoroethylene Membranes: Characterization, Biocompatibility Evaluation and Glucose Diffusion Characteristics

Hydrogel Networks of Poly(ethylene oxide) Star‐Molecules Supported by Expanded Polytetrafluoroethylene Membranes: Characterization, Biocompatibility Evaluation and Glucose Diffusion Characteristics

The Strength of the Macromonomer Strategy for Complex Macromolecular Architecture: Molecular Characterization, Properties and Applications of Polymacromonomers

From free radical to atom transfer radical polymerization of poly(ethylene oxide) macromonomers in nanostructured media

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