Addressing the role of triphenylphosphine in copper catalyzed ATRP

2018 ◽  
Vol 9 (44) ◽  
pp. 5348-5358 ◽  
Author(s):  
João R. C. Costa ◽  
Joana R. Góis ◽  
Francesco De Bon ◽  
Arménio C. Serra ◽  
Tamaz Guliashvili ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Catalyst System ◽  
Atom Transfer

A new Atom Transfer Radical Polymerization (ATRP) process with triphenylphosphine (PPh3) and [CuIIMe6TREN]2+ as the catalyst system is reported.

The Role of Cu0in Surface-Initiated Atom Transfer Radical Polymerization: Tuning Catalyst Dissolution for Tailoring Polymer Interfaces

2018 ◽  
Vol 51 (17) ◽  
pp. 6825-6835 ◽  
Author(s):  
Marco Fantin ◽  
Shivaprakash N. Ramakrishna ◽  
Jiajun Yan ◽  
Wenqing Yan ◽  
Mohammad Divandari ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Polymer Interfaces ◽  
Atom Transfer

ATRP Synthesis of PS-b-PtBMA and Preparation of Porous Film

2013 ◽  
Vol 364 ◽  
pp. 679-683
Author(s):  
Chang Hao Yan ◽  
Zhi Jiao Zhang ◽  
Hai Yan Chen ◽  
Zhong Yi Xie ◽  
Ting Zhu ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Catalyst System ◽  
Porous Film ◽  
Atom Transfer ◽  
H Nmr ◽  
Breath Figure ◽  
Breath Figure Method ◽  
End Group

The polystyrene with end group of Br was synthesized by using MBrP as the initiator, CuBr/ PMDETA as the catalyst system according to atom transfer radical polymerization (ATRP). The effect of reaction temperature was studied and the system was confirmed as the active polymerization. Then PS-Br and CuBr/ PMDETA were respectively used as macroinitiator and catalyst to polymerize tBMA according to atom transfer radical polymerization (ATRP). The structure of the product was characterized by GPCFTIR1H-NMR. The amphiphilic block copolymer was obtained after hydrolysis. And the honeycomb porous film was prepared by PS-b-PMAA through using breath figure method.

Synthesis of Novel Amphiphilic Block Copolymers of Poly-N-vinylpyrrolidone and Poly (D, L-lactide) by Atom Transfer Radical Polymerization

2006 ◽  
Vol 11-12 ◽  
pp. 461-464 ◽  
Author(s):  
Shu Xian Shi ◽  
Jian Liu ◽  
Yu Zheng Xia ◽  
Shu Ke Jiao ◽  
Xiao Yu Li
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Triblock Copolymers ◽  
Analytical Techniques ◽  
Catalyst System ◽  
Amphiphilic Polymer ◽  
Amphiphilic Block Copolymers ◽  
Atom Transfer ◽  
Polymer Micelle ◽  
Core Shell Structure

In order to improve the hydrophilicity of poly (D,L-latide) (PDLLA), a novel amphiphilic ABA-type triblock copolymers of poly-N-vinylpyrrolidone (A) and poly (D, L-lactide) (B), were successfully synthesized by atom transfer radical polymerization (ATRP) using N-vinylpyrrolidone (VP) as monomer, bromide-terminated poly (D,L-latide) oligomer (Br-PDLLA-Br) as functional macromolecular initiator which was prepared when hydroxy-terminated poly(D,L-latide) oligomer (HO-PDLLA-OH) reacted with 2-bromopropanoyl bromide, CuBr/2,2’-bipyridine complex as the catalyst system. The resulting copolymers were characterized by various analytical techniques. The results showed that the introduction of poly (N-vinylpyrrolidone) (PVP) segments into polylactide enhanced the surface hydrophilicity of the copolymers remarkably and amphiphilic polymer can self-assemble into core-shell structure (polymer micelle) in water by the balance of the hydrophilic and hydrophobic interaction.

The active role of excited states of phenothiazines in photoinduced metal free atom transfer radical polymerization: singlet or triplet excited states?

2016 ◽  
Vol 7 (39) ◽  
pp. 6039-6043 ◽  
Author(s):  
Steffen Jockusch ◽  
Yusuf Yagci
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Excited States ◽  
Flash Photolysis ◽  
Active Role ◽  
Free Atom ◽  
Resonance Spectroscopy ◽  
Atom Transfer ◽  
Metal Free

The active role of phenothiazine excited states in photoinduced metal-free atom transfer radical polymerization (ATRP) was investigated by using laser flash photolysis, fluorescence, phosphorescence and electron spin resonance spectroscopy.

Atom transfer radical polymerization of styrene initiated by the novel initiator 2-bromo-2-nitropropane

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Gang Wang ◽  
Xiulin Zhu ◽  
Cheng Zhengping ◽  
Jian Zhu
Keyword(s):  
Molecular Weight ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Average Molecular Weight ◽  
Monomer Conversion ◽  
Catalyst System ◽  
Chain Extension ◽  
Atom Transfer ◽  
The Novel ◽  
H Nmr

AbstractHeterogeneous atom transfer radical polymerization (ATRP) of styrene initiated by 2-bromo-2-nitropropane in bulk was carried out with CuCl/2,2′-bipyridine as the catalyst. The kinetics was first order in monomer and the numberaverage molecular weight of the polymer increased linearly with monomer conversion, indicating the ‘living’/controlled nature of the polymerization. However, the number-average molecular weight was usually higher than the theoretical one. The nitro group might react with the Cu complex, resulting in insufficient initiation. The amount of catalyst has no effect on the controllability of this catalyst system for the ATRP of styrene. The presence of a halide end group in the obtained polymer was confirmed by both 1H NMR and chain-extension reaction.

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