Antimicrobial activity of polystyrene particles coated by photo-crosslinked block copolymers containing a biocidal polymethacrylate block

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Sandrine Lenoir ◽  
Christophe Pagnoulle ◽  
Christophe Detrembleur ◽  
Moreno Galleni ◽  
Robert Jérôme
Keyword(s):  
Antimicrobial Activity ◽  
Block Copolymers ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Triblock Copolymers ◽  
Hydroxyl Group ◽  
Cross Linking ◽  
Biocidal Activity ◽  
Poly Ethylene ◽  
End Group

AbstractA commercially available poly(ethylene-co-butylene) copolymer, endcapped by a short polyisoprene block and a hydroxyl group (PI-b-PEB-OH), has been derivatized into a macroinitiator for atom transfer radical polymerization (ATRP) by esterification of the hydroxyl end-group by an activated bromidecontaining acyl bromide. Two types of triblock copolymers, PI-b-PEB-b-poly- (dimethylaminoethyl methacrylate) (PDMAEMA) and PI-b-PEB-b-poly[2-(tert-butylamino) ethyl methacrylate] (PTBAEMA), have been synthesized and used to coat polystyrene particles. These coatings have been permanently immobilized by UV cross-linking of the isoprene units. They exhibit a biocidal activity against Gramnegative bacteria either intrinsically in case of the PTBAEMA block or upon quaternization of the PDMAEMA block by octyl bromide. The antimicrobial activity is directly related to the concentration of coated PS particles in the medium.

pH sensitive amphiphilic conetworks based on end-group cross-linking of polydimethylsiloxane pentablock copolymer and polymethylhydrosiloxane

RSC Advances ◽  
2015 ◽  
Vol 5 (23) ◽  
pp. 17851-17861 ◽  
Author(s):  
Ming Qiu ◽  
Xin-Zheng Zhao ◽  
Da-Peng Liu ◽  
Chun-Ju He
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Ph Sensitive ◽  
Cross Linking ◽  
Atom Transfer ◽  
Ph Responsive ◽  
Pentablock Copolymers ◽  
Pentablock Copolymer ◽  
End Group

A series of pH-responsive amphiphilic conetworks were synthesized through cross-linking of well-defined amphiphilic pentablock copolymers via atom transfer radical polymerization.

scholarly journals Diblock, Triblock and Cyclic Amphiphilic Copolymers with CO2 Switchability: Effects of Topology

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 984
Author(s):  
Yuting Jiang ◽  
Tong Zhang ◽  
Zheng Yi ◽  
Yixiu Han ◽  
Xin Su ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ethylene Oxide ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Hydrodynamic Size ◽  
Amphiphilic Copolymers ◽  
Ethyl Methacrylate ◽  
Cyclic Molecules ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

The combination of topology and CO2 switchability could provide new options for amphiphilic copolymers. Cyclic molecules supply novel topologies, and CO2 switching provides stimulus responsiveness. Cyclic poly(2–(diethylamino)ethyl methacrylate)–b–poly(ethylene oxide) and their corresponding block copolymers were prepared from poly(ethylene oxide) and 2–(diethylamino)ethyl methacrylate via atom transfer radical polymerization and Keck allylation with a Hoveyda–Grubbs catalyst. Changes in conductivity, surface activity, and hydrodynamic size were examined to illustrate the switchability of the produced amphiphilic copolymers upon contact with CO2 in the presence of water. The reversible emulsification and switchable viscosity behaviors of the copolymers were also demonstrated.

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