Studies on functionalizing and grafting to poly(ether-urethanes)

Bamford, C. H.; Middleton, I. P.

doi:10.1016/0014-3057(83)90068-x

Cited by 41 publications

(12 citation statements)

References 7 publications

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“…It was noted that the homopolymer arises partly from thermal degradation of the polyamide substrates. 92,93 An interesting application of the Mn 2 (CO) 10 -based photoinitiating system is the grafting of low molecular weight polytetrafluoroethylene bearing terminal Mn(CO) 5 groups onto polystyrene-co-poly(methyl methacrylate) (Scheme 16). In the case of photoinitiated polymerization of tetrafluoroethylene in the presence of the copolymer, the polymeric radicals undergo both addition and substitution reactions with aromatic nuclei in the copolymer, so that the final graft copolymer carries short polytetrafluoroethylene chains with Mn(CO) 5 end groups.…”

Section: Block and Graft Copolymersmentioning

confidence: 99%

Macromolecular design and application using Mn₂(CO)₁₀‐based visible light photoinitiating systems

Çiftçi

Taşdelen

Yaǧcı

2016

Polymer International

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The environmentally friendly Mn 2 (CO) 10 -based visible light photoinitiating system is a powerful method for the preparation of linear and crosslinked polymeric structures. From a practical point of view, the most important feature of this initiating system is its optical characteristics in the visible range with high quantum yield and good solubility properties. This photoinitiating system is applicable for a variety of monomers that can be polymerized via either radical or cationic mechanisms. Various complex macromolecular structures such as telechelic polymers, block and graft copolymers, polymer networks and surface modifications can be simply prepared by using halogenated precursors. This photoinitiating system is also combined with controlled radical polymerization techniques providing a mild and efficient method for polymer synthesis.

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Section: Block and Graft Copolymersmentioning

confidence: 99%

Macromolecular design and application using Mn₂(CO)₁₀‐based visible light photoinitiating systems

Çiftçi

Taşdelen

Yaǧcı

2016

Polymer International

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“…The membrane was immersed in an aqueous monomer solution with concentrations of 1, 5, and 10 wt% for different periods of time, and placed into a Pyrex glass tube closed with a rubber stopper and replaced with nitrogen. Graft polymerization was carried out under UV irradiation at a distance of 12.5 cm for 1 h at 35 ± C. The grafted membrane was rinsed with hot water (70 ± C) for at least 48 h to remove the homopolymer [17], and then dried in vacuum at 50 ± C for 24 h.…”

Section: Photo-oxidization and Graft Polymerizationmentioning

confidence: 99%

“…To realize the graft polymerization of vinyl monomers onto PU, different methods such as plasma treatment [13],°-ray irradiation [14], ozone oxidization pretreatment [15], cerium(IV) ions, or transition metal activation [16,17] were employed. Among them,°-ray irradiation and plasma treatment were widely used.…”

Section: Introductionmentioning

confidence: 99%

Surface photo-grafting of polyurethane with 2-hydroxyethyl acrylate for promotion of human endothelial cell adhesion and growth

Guan¹,

Gao²,

Feng³

et al. 2000

Journal of Biomaterials Science, Polymer Edition

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Cytocompatible polyurethane (PU) surface was prepared by photo-grafting 2-hydroxyethyl acrylate (HEA) onto the membrane surface. Graft polymerization was conducted by combining the use of the photo-oxidation and irradiation grafting. PU membrane was photo-oxidized to introduce the hydroperoxide groups onto the surface, then the membrane, immersed previously in monomer solution, was irradiated under UV light. The ATR-FTIR spectra, element spectroscopy for chemical analysis (ESCA), scanning electron microscopy (SEM) and water contact angle characterized the grafted copolymers and verified the occurrence of graft polymerization. The results showed that UV irradiation could realize the graft polymerization effectively and the grafting was confined within the surface layer. The grafted membrane showed minimal surface morphology. Human umbilical vein endothelial (HUVE) cells were seeded on the grafted surface. The performance of the surface in cell attachment and growth correlated with the oxygen content and mainly the carbonyl content on the surface. Cells were spread more extensively and grew faster on the surface with a higher oxygen content.

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“…In order to decrease protein adsorption which, in its turn, is related to subsequent bacterial adhesion [6], it is important to enhance the hydrophilicity of polymeric biomaterials. One of the most efficient means for that is incorporating various covalently bound substituents with polar (ionic) functional groups in the polymer chains [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Mössbauer spectroscopic study of sulphonated poly(ether-urethane) linear ionomer doped with iron species

et al. 2009

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Thermoplastic linear poly(ether-urethane) sulphonated ionomer (PEUSI), doped with natural Fe 2+ , was studied by Mössbauer spectroscopy at T = 78 and 290 K in order to monitor the chemical state of Fe species. The Fe 2+ added was found to get only partly oxidised in the course of preparation of a dry polymer film from aqueous suspension. The oxidised part gave a ferric quadrupole doublet (over half of total Fe added) and, at T = 78 K only, a small portion of magnetically split sextet (ca. 3%), whereas Fe II (total over 40%) stabilised in two different forms (represented by quadrupole doublets) corresponding to two types of iron(II) microenvironments, where Fe II could be coordinated involving -CONH-and -NHNH-moieties and sulphonate groups in PEUSI. The results obtained show that Fe 2+ -doping of PEUSIbased materials may be used for probing their structural characteristics by Mössbauer spectroscopy. A.A. Kamnev et al.

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Studies on functionalizing and grafting to poly(ether-urethanes)

Cited by 41 publications

References 7 publications

Macromolecular design and application using Mn₂(CO)₁₀‐based visible light photoinitiating systems

Macromolecular design and application using Mn₂(CO)₁₀‐based visible light photoinitiating systems

Surface photo-grafting of polyurethane with 2-hydroxyethyl acrylate for promotion of human endothelial cell adhesion and growth

Mössbauer spectroscopic study of sulphonated poly(ether-urethane) linear ionomer doped with iron species

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Studies on functionalizing and grafting to poly(ether-urethanes)

Cited by 41 publications

References 7 publications

Macromolecular design and application using Mn2(CO)10‐based visible light photoinitiating systems

Macromolecular design and application using Mn2(CO)10‐based visible light photoinitiating systems

Surface photo-grafting of polyurethane with 2-hydroxyethyl acrylate for promotion of human endothelial cell adhesion and growth

Mössbauer spectroscopic study of sulphonated poly(ether-urethane) linear ionomer doped with iron species

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Macromolecular design and application using Mn₂(CO)₁₀‐based visible light photoinitiating systems

Macromolecular design and application using Mn₂(CO)₁₀‐based visible light photoinitiating systems