Controlled Polymerization of Functional Monomers and Synthesis of Block Copolymers Using a β-Phosphonylated Nitroxide

2003 ◽  
Vol 36 (7) ◽  
pp. 2235-2241 ◽  
Author(s):  
T. Diaz ◽  
A. Fischer ◽  
A. Jonquières ◽  
A. Brembilla ◽  
P. Lochon
Keyword(s):  
Block Copolymers ◽  
Controlled Polymerization ◽  
Functional Monomers

Synthesis of Rod-Coil Block Copolymers using Two Controlled Polymerization Techniques

2007 ◽  
Vol 248 (1) ◽  
pp. 199-206 ◽  
Author(s):  
Simone Steig ◽  
Frauke Cornelius ◽  
Andreas Heise ◽  
Rutger J. I. Knoop ◽  
Gijs J. M. Habraken ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Controlled Polymerization

Putting the fizz into chemistry: applications of supercritical carbon dioxide in tissue engineering, drug delivery and synthesis of novel block copolymers

2007 ◽  
Vol 35 (3) ◽  
pp. 516-521 ◽  
Author(s):  
H. Tai ◽  
V.K. Popov ◽  
K.M. Shakesheff ◽  
S.M. Howdle
Keyword(s):  
Carbon Dioxide ◽  
Drug Delivery ◽  
Tissue Engineering ◽  
Block Copolymers ◽  
Supercritical Carbon Dioxide ◽  
Drug Carriers ◽  
Controlled Polymerization ◽  
Polymeric Scaffolds ◽  
Potential Use ◽  
Supercritical Carbon

This paper describes the recent progress at Nottingham towards the exploitation of the unique properties of scCO2 (supercritical carbon dioxide) for the preparation of polymeric scaffolds for tissue engineering applications and new devices for controlled drug delivery, as well as the synthesis of novel block copolymers by the combination of eROP (enzymatic ring opening polymerization) and controlled polymerization methods for the potential use as drug carriers.

Polymerization of long chain alkyl glycidyl ethers: a platform for micellar gels with tailor-made melting points

2018 ◽  
Vol 9 (44) ◽  
pp. 5327-5338 ◽  
Author(s):  
Patrick Verkoyen ◽  
Tobias Johann ◽  
Jan Blankenburg ◽  
Christian Czysch ◽  
Holger Frey
Keyword(s):  
Block Copolymers ◽  
Ring Opening ◽  
Amphiphilic Block Copolymers ◽  
Melting Points ◽  
Controlled Polymerization ◽  
Glycidyl Ethers ◽  
Anionic Ring ◽  
Long Chain

Controlled polymerization of long-chain alkyl glycidyl ethers (AlkGE) under anionic ring opening conditions is enabled by the addition of 18-crown-6. Capitalizing on this strategy, highly amphiphilic block copolymers are prepared that form hydrogels with adjustable melting points.

Synthesis of Rod-Coil Block Copolymers using Two Controlled Polymerization Techniques

2007 ◽  
pp. 199-206
Author(s):  
Simone Steig ◽  
Frauke Cornelius ◽  
Andreas Heise ◽  
Rutger J. I. Knoop ◽  
Gijs J. M. Habraken ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Controlled Polymerization

Pd-initiated controlled polymerization of diazoacetates with a bulky substituent: synthesis of well-defined homopolymers and block copolymers with narrow molecular weight distribution from cyclophosphazene-containing diazoacetates

2015 ◽  
Vol 6 (26) ◽  
pp. 4709-4714 ◽  
Author(s):  
Hiroaki Shimomoto ◽  
Hironori Asano ◽  
Tomomichi Itoh ◽  
Eiji Ihara
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Bulky Substituent ◽  
Narrow Molecular Weight Distribution ◽  
Controlled Polymerization

Pd-initiated polymerization of cyclophosphazene-containing diazoacetates proceeded in a controlled manner.

scholarly journals Polystyrene-b-Poly(2-(Methoxyethoxy)ethyl Methacrylate) Polymerization by Different Controlled Polymerization Mechanisms

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3505
Author(s):  
Dragutin Nedeljkovic
Keyword(s):  
Block Copolymers ◽  
Radical Polymerization ◽  
Anionic Polymerization ◽  
Average Molecular Weight ◽  
Side Reactions ◽  
Controlled Polymerization ◽  
Ethyl Methacrylate ◽  
Structures And Properties ◽  
Important Field ◽  
Atomic Transfer Radical Polymerization

Functional polymers have been an important field of research in recent years. With the development of the controlled polymerization methods, block-copolymers of defined structures and properties could be obtained. In this paper, the possibility of the synthesis of the functional block-copolymer polystyrene-b-poly(2-(methoxyethoxy)ethyl methacrylate) was tested. The target was to prepare the polymer of the number average molecular weight (Mn) of approximately 120 that would contain 20–40% of poly(2-(methoxyethoxy)ethyl methacrylate) by mass and in which the polymer phases would be separated. The polymerization reactions were performed by three different mechanisms for the controlled polymerization—sequential anionic polymerization, atomic transfer radical polymerization and the combination of those two methods. In sequential anionic polymerization and in atomic transfer radical polymerization block-copolymers of the desired composition were obtained but with the Mn significantly lower than desired (up to 30). The polymerization of the block-copolymers of the higher Mn was unsuccessful, and the possible mechanisms for the unwanted side reactions are discussed. It is also concluded that combination of sequential anionic polymerization and atomic transfer radical polymerization is not suitable for this system as polystyrene macroinitiator cannot initiate the polymerization of poly(2-(methoxyethoxy)ethyl methacrylate).

scholarly journals Iron Catalysts in Atom Transfer Radical Polymerization

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1648 ◽  
Author(s):  
Sajjad Dadashi-Silab ◽  
Krzysztof Matyjaszewski
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
High Efficiency ◽  
Catalyst Design ◽  
Iron Catalysts ◽  
Atom Transfer ◽  
Controlled Polymerization ◽  
Catalytic Systems ◽  
Functional Monomers ◽  
Styrene Atrp

Catalysts are essential for mediating a controlled polymerization in atom transfer radical polymerization (ATRP). Copper-based catalysts are widely explored in ATRP and are highly efficient, leading to well-controlled polymerization of a variety of functional monomers. In addition to copper, iron-based complexes offer new opportunities in ATRP catalysis to develop environmentally friendly, less toxic, inexpensive, and abundant catalytic systems. Despite the high efficiency of iron catalysts in controlling polymerization of various monomers including methacrylates and styrene, ATRP of acrylate-based monomers by iron catalysts still remains a challenge. In this paper, we review the fundamentals and recent advances of iron-catalyzed ATRP focusing on development of ligands, catalyst design, and techniques used for iron catalysis in ATRP.

scholarly journals The Controlled Polymerization of Poly(cyclopentadithiophene)s and Their All-Conjugated Block Copolymers

2013 ◽  
Vol 46 (22) ◽  
pp. 8888-8895 ◽  
Author(s):  
Pieter Willot ◽  
Sanne Govaerts ◽  
Guy Koeckelberghs
Keyword(s):  
Block Copolymers ◽  
Controlled Polymerization

Self-Assembly of Hydrogels From Elastin-Mimetic Block Copolymers

2002 ◽  
Vol 724 ◽  
Author(s):  
Elizabeth R. Wright ◽  
R. Andrew McMillan ◽  
Alan Cooper ◽  
Robert P. Apkarian ◽  
Vincent P. Conticello
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Variable Temperature ◽  
Inverse Temperature ◽  
Temperature Transition ◽  
Scanning Calorimetry ◽  
Design Synthesis ◽  
Inverse Temperature Transition ◽  
Functional Biomaterials

AbstractTriblock copolymers have traditionally been synthesized with conventional organic components. However, triblock copolymers could be synthesized by the incorporation of two incompatible protein-based polymers. The polypeptides would differ in their hydrophobicity and confer unique physiochemical properties to the resultant materials. One protein-based polymer, based on a sequence of native elastin, that has been utilized in the synthesis of biomaterials is poly (Valine-Proline-Glycine-ValineGlycine) or poly(VPGVG) [1]. This polypeptide has been shown to have an inverse temperature transition that can be adjusted by non-conservative amino acid substitutions in the fourth position [2]. By combining polypeptide blocks with different inverse temperature transition values due to hydrophobicity differences, we expect to produce amphiphilic polypeptides capable of self-assembly into hydrogels. Our research examines the design, synthesis and characterization of elastin-mimetic block copolymers as functional biomaterials. The methods that are used for the characterization include variable temperature 1D and 2D High-Resolution-NMR, cryo-High Resolutions Scanning Electron Microscopy and Differential Scanning Calorimetry.

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