Macro-RAFT agent mediated dispersion polymerization: the monomer concentration effect on the morphology of the in situ synthesized block copolymer nano-objects

2015 ◽  
Vol 6 (46) ◽  
pp. 8003-8011 ◽  
Author(s):  
Zhonglin Ding ◽  
Chengqiang Gao ◽  
Shuang Wang ◽  
Hui Liu ◽  
Wangqing Zhang
Keyword(s):  
Block Copolymer ◽  
Dispersion Polymerization ◽  
Raft Polymerization ◽  
Monomer Concentration ◽  
Concentration Effect ◽  
Raft Agent

The great effect of the monomer concentration on the block copolymer morphology under dispersion RAFT polymerization is found and demonstrated.

Aqueous Dispersion Polymerization: A New Paradigm for in Situ Block Copolymer Self-Assembly in Concentrated Solution

2011 ◽  
Vol 133 (39) ◽  
pp. 15707-15713 ◽  
Author(s):  
Shinji Sugihara ◽  
Adam Blanazs ◽  
Steven P. Armes ◽  
Anthony J. Ryan ◽  
Andrew L. Lewis
Keyword(s):  
Block Copolymer ◽  
Self Assembly ◽  
Dispersion Polymerization ◽  
Aqueous Dispersion ◽  
New Paradigm ◽  
Concentrated Solution

Fluorinated amphiphilic block copolymers via RAFT polymerization and their application as surf-RAFT agent in miniemulsion polymerization

RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15461-15468 ◽  
Author(s):  
Bishnu P. Koiry ◽  
Arindam Chakrabarty ◽  
Nikhil K. Singha
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Ethylene Glycol ◽  
Raft Polymerization ◽  
Miniemulsion Polymerization ◽  
Amphiphilic Block Copolymers ◽  
Poly Ethylene Glycol ◽  
Raft Agent ◽  
Poly Ethylene ◽  
Glycol Methyl Ether

Preparation of an amphiphilic block copolymer (Am-BCP) based on poly(ethylene glycol) methyl ether methacrylate (PEGMA) and heptafluorobutyl acrylate (HFBA) via RAFT polymerization and application of this Am-BCP as surf-RAFT agent for polymerization of styrene.

Living free radical polymerization of styrene with 2-cyanoprop-2-yl dithionaphthalate as RAFT agent

e-Polymers ◽  
2003 ◽  
Vol 3 (1) ◽  
Author(s):  
Zhu Jian ◽  
Zhu Xiulin ◽  
Zhou Di ◽  
Chen Jianying
Keyword(s):  
Molecular Weight ◽  
Reaction Temperature ◽  
Raft Polymerization ◽  
Monomer Concentration ◽  
Gel Permeation Chromatography ◽  
Monomer Conversion ◽  
Bulk Polymerization ◽  
Polymerization Rate ◽  
Chain Extension ◽  
Raft Agent

Abstract The reversible addition-fragmentation chain transfer (RAFT) bulk polymerization of styrene was studied using 2-cyanoprop-2-yl dithionaphthalate (CPDN) as RAFT agent in the presence or absence of 2,2’-azoisobutyronitrile (AIBN). The results of both thermally and AIBN-initiated styrene (St) polymerizations show that St can be polymerized in a controlled way using CPDN as RAFT agent; i.e., the polymerization rate is first order with respect to monomer concentration, and molecular weight increases linearly with monomer conversion. The molecular weights obtained from gel permeation chromatography are close to the theoretical values and molecular weight distributions are relatively narrow (Mw/Mn < 1.2). It is confirmed by chain extension reaction that the polymer prepared via RAFT polymerization can be used as a macroRAFT agent. The effects of reaction temperature and mole ratios [St]0/[CPDN]0/[AIBN]0 on the polymerization were investigated. The results indicate that the reaction temperature has a positive effect on the polymerization rate, but little effect on molecular weight and molecular weight distribution, and the optimum mole ratios were found to be [CPDN]0/[AIBN]0 > 4/3 and [St]0/[CPDN]0 < 800.

Optimization of the RAFT polymerization conditions for the in situ formation of nano-objects via dispersion polymerization in alcoholic medium

2014 ◽  
Vol 5 (24) ◽  
pp. 6990-7003 ◽  
Author(s):  
Wei Zhao ◽  
Guillaume Gody ◽  
Siming Dong ◽  
Per B. Zetterlund ◽  
Sébastien Perrier
Keyword(s):  
Dispersion Polymerization ◽  
Raft Polymerization ◽  
Alcoholic Medium ◽  
In Situ Formation ◽  
Polymerization Conditions

Reversible Addition–Fragmentation Chain Transfer (RAFT) Polymerization in Miniemulsion Based on In Situ Surfactant Generation

2011 ◽  
Vol 64 (8) ◽  
pp. 1033 ◽  
Author(s):  
S. R. Simon Ting ◽  
Eun Hee Min ◽  
Per B. Zetterlund
Keyword(s):  
Potassium Hydroxide ◽  
Colloidal Stability ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Miniemulsion Polymerization ◽  
High Energy ◽  
Reversible Addition ◽  
Raft Agent ◽  
Surface Active

Reversible addition–fragmentation chain transfer (RAFT) polymerization of styrene has been implemented in aqueous miniemulsion based on the in situ surfactant generation approach using oleic acid and potassium hydroxide in the absence of high energy mixing. The best results were obtained using the RAFT agent 3-benzylsulfanyl thiocarbonyl sufanylpropionic acid (BSPAC), most likely as a result of the presence of a carboxylic acid functionality in the RAFT agent that renders it surface active and thus imparts increased colloidal stability. Stable final miniemulsions were obtained with no coagulum with particle diameters less than 200 nm. The results demonstrate that the RAFT miniemulsion polymerization of styrene employing the low energy in situ surfactant method is challenging, but that a system that proceeds predominantly by a miniemulsion mechanism can be achieved under carefully selected conditions.

In situ synthesis of the Ag/poly(4-vinylpyridine)-block-polystyrene composite nanoparticles by dispersion RAFT polymerization

2017 ◽  
Vol 8 (20) ◽  
pp. 3203-3210 ◽  
Author(s):  
Hui Liu ◽  
Mingdu Ding ◽  
Zhonglin Ding ◽  
Chengqiang Gao ◽  
Wangqing Zhang
Keyword(s):  
Block Copolymer ◽  
Ag Nanoparticles ◽  
Raft Polymerization ◽  
In Situ Synthesis ◽  
New Method ◽  
Composite Nanoparticles ◽  
Metal Block

A new method for the synthesis of metal/block-copolymer nanocomposites of poly(4-vinylpyridine)-b-polystyrene (P4VP-b-PS) and Ag nanoparticles by dispersion RAFT polymerization is proposed.

One-pot preparation of BAB triblock copolymer nano-objects through bifunctional macromolecular RAFT agent mediated dispersion polymerization

2016 ◽  
Vol 7 (10) ◽  
pp. 1953-1962 ◽  
Author(s):  
Yaqing Qu ◽  
Shuang Wang ◽  
Habib Khan ◽  
Chengqiang Gao ◽  
Heng Zhou ◽  
...  
Keyword(s):  
Triblock Copolymer ◽  
Dispersion Polymerization ◽  
Raft Polymerization ◽  
One Pot ◽  
Raft Agent ◽  
Macromolecular Raft Agent

Nano-assemblies of a BAB triblock copolymer containing a solvophilic A block and two solvophobic B blocks were prepared through dispersion RAFT polymerization.

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