scholarly journals Acrylamide Homopolymers and Acrylamide–N-Isopropylacrylamide Block Copolymers by Atomic Transfer Radical Polymerization in Water

2012 ◽  
Vol 45 (10) ◽  
pp. 4040-4045 ◽  
Author(s):  
D. A. Z. Wever ◽  
P. Raffa ◽  
F. Picchioni ◽  
A. A. Broekhuis
Keyword(s):  
Block Copolymers ◽  
Radical Polymerization ◽  
Atomic Transfer Radical Polymerization

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).

Photocontrolled iodine-mediated reversible-deactivation radical polymerization with a semifluorinated alternating copolymer as the macroinitiator

2020 ◽  
Vol 11 (47) ◽  
pp. 7497-7505
Author(s):  
Jiannan Cheng ◽  
Kai Tu ◽  
Enjie He ◽  
Jinying Wang ◽  
Lifen Zhang ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Radical Polymerization ◽  
Room Temperature ◽  
Blue Led ◽  
Led Light ◽  
Alternating Copolymers ◽  
Alternating Copolymer ◽  
Reversible Deactivation ◽  
Novel Strategy ◽  
Reversible Deactivation Radical Polymerization

A novel strategy for preparing block copolymers with semifluorinated alternating copolymers as macroinitiators was established by photocontrolled iodine-mediated RDRP under irradiation with blue LED light at room temperature.

Synthesis of Conjugated−Ionic Block Copolymers by Controlled Radical Polymerization

2003 ◽  
Vol 36 (2) ◽  
pp. 304-310 ◽  
Author(s):  
Su Lu ◽  
Qu-Li Fan ◽  
Soo-Jin Chua ◽  
Wei Huang
Keyword(s):  
Block Copolymers ◽  
Radical Polymerization ◽  
Controlled Radical Polymerization

Photoinduced controlled radical polymerization of methacrylates with benzaldehyde derivatives as organic catalysts

2017 ◽  
Vol 8 (23) ◽  
pp. 3574-3585 ◽  
Author(s):  
Wenchao Ma ◽  
Xianhong Zhang ◽  
Yuhong Ma ◽  
Dong Chen ◽  
Li Wang ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Radical Polymerization ◽  
Catalytic System ◽  
Controlled Radical Polymerization ◽  
System P ◽  
Benzaldehyde Derivatives ◽  
Organic Catalysts

Under 23 W CFL irradiation, block copolymers are obtained starting from a Pn-I macroinitiator in the presence of a benzaldehydic molecule-based catalytic system.

scholarly journals Synthesis of Poly(methyl methacrylate)-b-poly(N-isopropylacrylamide) Block Copolymer by Redox Polymerization and Atom Transfer Radical Polymerization

2018 ◽  
Vol 18 (3) ◽  
pp. 537 ◽  
Author(s):  
Melahat Göktaş ◽  
Guodong Deng
Keyword(s):  
Block Copolymers ◽  
Methyl Methacrylate ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Gel Permeation Chromatography ◽  
High Yield ◽  
Resonance Spectroscopy ◽  
Atom Transfer ◽  
Poly Methyl Methacrylate ◽  
Redox Polymerization

Poly(methyl methacrylate)-b-poly(N-isopropylacrylamide) [PMMA-b-PNIPAM] block copolymers were obtained by a combination of redox polymerization and atom transfer radical polymerization (ATRP) methods in two steps. For this purpose, PMMA macroinitator (ATRP-macroinitiator) was synthesized by redox polymerization of methyl methacrylate and 3-bromo-1-propanol using Ce(NH4)2(NO3)6 as a catalyst. The synthesis of PMMA-b-PNIPAM block copolymers was carried out by means of ATRP of ATRP-macroinitiator and NIPAM at 60 °C. The block copolymers were obtained in high yield and high molecular weight. The characterization of products was accomplished by using multi instruments and methods such as nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, gel permeation chromatography, and thermogravimetric analysis.

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