Amphiphilic polymers from macromonomers and telechelics

Velichkova, R.; Christova, Darinka

doi:10.1016/0079-6700(95)00004-y

Cited by 96 publications

(26 citation statements)

References 169 publications

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“…They have been explored for many applications in material science and biomedicine areas [1][2][3][4]. Among them, amphiphilic block copolymers with either linear [5][6][7] or nonlinear (comb or star-shaped and dendritic) [8,9] architectures have been intensively studied due to their abilities to self-assemble into versatile superstructures in solution, in bulk or on interface. These polymers were conventionally synthesized via living (controlled) polymerization techniques, such as ionic polymerization, reversible addition-fragmentation chain transfer (RAFT) polymerization or atom transfer radical polymerization (ATRP), and therefore, strict experimental conditions are required.…”

Section: Introductionmentioning

confidence: 99%

“…Differently, syntheses of homopolymers are much robust and conventional free radical polymerization could be applied, but little attention has been drawn for the synthesis of homopolymers with amphiphilic characteristics. Different from the conventional amphiphilic copolymers consisting of covalently linked blocks or segments (large scale) with either hydrophilic or hydrophobic philicity [10], amphiphilic homopolymers are a novel class of homopolymers constituted in each repeat unit (on monomer level) with both hydrophilic and hydrophobic moieties. These moieties are located oppositely along the polymer main chain at small scale, possibly rendering novel assembles.…”

Section: Introductionmentioning

confidence: 99%

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Amphiphilic dendronized homopolymers

Zhang

2010

Sci. China Chem.

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A series of second generation of amphiphilic dendronized homopolymers are efficiently synthesized, and their thermoresponsiveness in aqueous solutions and secondary structures in methanol solutions are described. These polymers are constructed in each repeat unit with various generations of hydrophobic 4-aminoproline and hydrophilic oligoethylene glycol (OEG)-based dendrons, and their over-all hydrophilicity is tuned by varying these dendron generations. Polymers with or without the first generation of proline dendron show good water solubility at room temperature, but exhibit typical thermoresponsive behaviors at elevated temperatures as characterized by turbidity measurements using UV-vis spectroscopy, while the polymer with the secondary generation of proline dendron is not soluble in water. All polymers show ordered secondary structures as evidenced by the optical rotation and circular dichroism experiments. Finally, assembly of these amphiphilic homopolymers into porous films via breath figure (BF) technique is described, and polymer structures are found to show significant influence on the morphology of porous film. amphiphilic polymer, dendronized polymer, dendritic macromolecule, supramolecular structure

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Amphiphilic dendronized homopolymers

Zhang

2010

Sci. China Chem.

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“…Graft copolymers can be obtained by three general methods: (i) grafting-to, in which side chains are preformed and then attached to the backbone; (ii) grafting-from, in which the monomer is grafted from the backbone; and (iii) grafting-through, in which the macromonomers are copolymerized. [2,3] Photoinduced processes have been recognized as a useful synthetic methodology applied to macromolecular chem-istry offering molecules ranging from cross-linked networks to the block and graft copolymer. As such, they are particularly important in preparative methods, in which low-temperature, low energy consumption, and high conversions are desirable.…”

Section: Introductionmentioning

confidence: 99%

Polymers with Side Chain N‐Alkoxy Pyridinium Ions as Precursors for Photoinduced Grafting and Modification Processes

Durmaz

Yılmaz

Yaǧcı

2007

Macro Chemistry & Physics

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A combination of NMP and photoinitiated polymerization is suggested as a new strategy for the synthesis of graft copolymers. First, P(S‐co‐CMS) copolymer backbones with different chloromethyl content are prepared by NMP. The chloro functions are then converted into photosensitive 4‐phenyl pyridinium‐N‐oxide ion functions. Finally, these photoactive polymers are irradiated in the presence of MMA to obtain the graft copolymers. They and their precursors at various stages are characterized by spectroscopy and GPC. It is demonstrated that the irradiation of photoactive polymers in the presence of a hydrogen donors such as THF facilitates the conversion of pyridinium ions to hydroxyl groups.

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“…Likewise, various polymer architectures can be developed, such as block and graft copolymers, star polymers, etc. [10,11] Some polyoxazolines, as polymethyloxazoline, have hydrophilic character while others, as for example polynonyloxazoline, have hydrophobic character. In recent years, our research group has developed, based on NiPAAm and 2-oxazolines, different polymer structures soluble in water and sensitive to temperature and pH, [20][21][22][23] which formed stable and reversible micelles, and the formation of double-responsive nanogels by irradiation with electrons was demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of new pH- and thermo-responsive hydrogels based on N-isopropylacrylamide and 2-oxazolines

Rueda

Campos

Komber

et al. 2013

Designed Monomers and Polymers

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Voit (2014) Synthesis and characterization of new pH-and thermoresponsive hydrogels based on N-isopropylacrylamide and 2-oxazolines, Designed Monomers and Polymers, 17:3, 208-216, DOI: 10.1080/15685551.2013 New pH-and thermo-responsive hydrogels (HG) were synthesized by free radical polymerization of N-isopropylacrylamide and a macromonomer, which was a hydrolyzed random copolymer of 2-carboxyethyl-and 2-methyl-2-oxazoline, using a bisacrylamide as crosslinker. The polymerization was carried out in a mixture of water and ethanol at room temperature and was initiated by ammonium peroxodisulfate. The HG showed conformational transitions with variation of temperature and/or pH-value and as a function of hydrogel composition. This property was shown macroscopically as hydrogel contraction or expansion. The HG structures were characterized by high-resolution magic angle spinning (HRMAS) NMR spectroscopy. The thermal properties, in particular the lower critical solution temperatures, were determined by temperature-dependent HRMAS NMR measurements and differential scanning calorimetry. The pH responsibility was determined by swelling experiments in water at different pH values.

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Amphiphilic polymers from macromonomers and telechelics

Cited by 96 publications

References 169 publications

Amphiphilic dendronized homopolymers

Amphiphilic dendronized homopolymers

Polymers with Side Chain N‐Alkoxy Pyridinium Ions as Precursors for Photoinduced Grafting and Modification Processes

Synthesis and characterization of new pH- and thermo-responsive hydrogels based on N-isopropylacrylamide and 2-oxazolines

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