Synthesis of Poly(β-cyclodextrin-maleic anhydride) Conjugated Magnetic Nanoparticles via RAFT Polymerization for Adsorption of Organic Compound

2014 ◽  
Vol 955-959 ◽  
pp. 149-153 ◽  
Author(s):  
Ming Ni ◽  
Yi Ming Cheng ◽  
Dong Jian Shi ◽  
Peng Yun Li ◽  
Ming Qing Chen
Keyword(s):  
Magnetic Nanoparticles ◽  
Water Treatment ◽  
Organic Compound ◽  
Maleic Anhydride ◽  
Methyl Methacrylate ◽  
Acid Chloride ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Adsorption Property ◽  
Xrd And Tem

In this paper, novel magnetic nanoparticles by initiating maleic anhydride-β-cyclodextrin (MAHCD) polymerization onto the surface of Fe3O4 nanoparticles were prepared. Firstly, MNPs were modified by silane couple agent, and then the modified MNPs reacted with 3-benzylsulfanyl thiocarbonyl sulfanyl propionic acid chloride to obtain RAFT chain transfer modified Fe3O4 nanoparticles. Then, maleic anhydride-β-cyclodextrin (MAHCD) was prepared by the reaction of maleic anhydride with β-cyclodextrin. Finally, MNP@P(MAHCD-co-MMA) nanoparticles were prepared using MAHCD and methyl methacrylate (MMA) as monomers and modified Fe3O4 nanoparticles as chain transfer agent by RAFT in the presence of initiator AIBN. The structure and size of the MNP@P(MAHCD-co-MMA) nanoparticles were confirmed by FTIR, TGA, XRD and TEM. The results showed that the MNP@P(MAHCD-co-MMA) nanoparticles about 200 nm were successfully prepared. Moreover, the MNP@P(MAHCD-co-MMA) nanoparticles showed well adsorption property using hydroxylbenzoic acid as the guest compound. Therefore, the MNP@P(MAHCD-co-MMA) nanoparticles have the capability to adsorb suitable guest compounds, and could be used for water treatment.

Preparation of azobenzene-terminated polymers via reversible addition-fragmentation chain transfer (RAFT) polymerization

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Xiaoming Wan ◽  
Zhengbiao Zhang ◽  
Xiulin Zhu ◽  
Jian Zhu ◽  
Zhenping Cheng
Keyword(s):  
Methyl Methacrylate ◽  
Fluorescence Spectra ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Reversible Addition ◽  
Azobenzene Moiety

AbstractThree azobenzene-based dithiocarbamates, 2-(phenylazo-phenoxycarbonyl) prop-2-yl 9H-carbazole-9-carbodithioate (APCDT), 2-(4-nitro-phenylazophenoxy- carbonyl)prop-2-yl 9H-carbazole-9-carbodithioate (ANPCDT), 2-(4-cyanophenylazo- phenoxy-carbonyl)pro-2-yl 9H-carbazole-9-carbodithioate (ACPCDT), were synthesized and used as RAFT agents in the polymerizations of styrene (St) and methyl methacrylate (MMA). The results showed that APCDT, ACPCDT and ANPCDT were effective RAFT agents for the polymerization of St. In the case of MMA, the polymerization showed hybrid behavior. The different substitutes on azobenzene moiety in dithiocarbamates did not show obvious influence on the controllability of the polymerizations. The UV and fluorescence spectra of RAFT agents and obtained azobenzene-terminated polymers were investigated

A surfactant-free emulsion RAFT polymerization of methyl methacrylate in a continuous tubular reactor

2015 ◽  
Vol 6 (11) ◽  
pp. 1937-1943 ◽  
Author(s):  
Zhen Li ◽  
Weijie Chen ◽  
Zhengbiao Zhang ◽  
Lifen Zhang ◽  
Zhenping Cheng ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Chain Transfer ◽  
Mixed Solvent ◽  
Raft Polymerization ◽  
Tubular Reactor ◽  
Chain Transfer Agent ◽  
Dimethyl Formamide

A surfactant-free emulsion RAFT polymerization of methyl methacrylate was successfully conducted in a continuous tubular reactor with a mixed solvent of water and dimethyl formamide in the presence of air, using CTBCOOH as the chain transfer agent and emulsion stabilizer.

High Temperature Initiator-Free RAFT Polymerization of Methyl Methacrylate in a Microwave Reactor

2009 ◽  
Vol 62 (3) ◽  
pp. 254 ◽  
Author(s):  
Renzo M. Paulus ◽  
C. Remzi Becer ◽  
Richard Hoogenboom ◽  
Ulrich S. Schubert
Keyword(s):  
High Temperature ◽  
Methyl Methacrylate ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Linear Increase ◽  
Thermal Heating ◽  
Controlled Polymerization ◽  
Microwave Reactor ◽  
Reversible Addition ◽  
Raft Agent

The reversible addition–fragmentation chain transfer (RAFT) polymerization of methyl methacrylate (MMA) was investigated under microwave irradiation. At first, a comparison was made between microwave and thermal heating for the RAFT polymerization of MMA with azobis(isobutyronitrile) (AIBN) as initiator and 2-cyano-2-butyldithiobenzoate (CBDB) as RAFT agent, revealing comparable polymerization kinetics indicating the absence of non-thermal microwave effects. Second, the CBDB-mediated RAFT polymerization of MMA was investigated at high temperatures (120°C, 150°C, and 180°C, respectively) in the absence of a radical initiator, showing a linear increase of the molar masses with conversion. The polydispersity indices remained below 1.5 up to 25% MMA conversion at 120°C and 150°C, indicating a controlled polymerization. This control over the polymerization was confirmed by the ability to control the molar masses by the concentration of RAFT agent.

Reversible Addition-Fragmentation Chain Transfer (RAFT) Polymerization of Vinyl Monomers Initiated by Poly(methyl methacrylate) Peroxide

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Zhengbiao Zhang ◽  
Xiulin Zhu ◽  
Jian Zhu ◽  
Zhenping Cheng
Keyword(s):  
Methyl Methacrylate ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Controlled Radical Polymerization ◽  
Polymer Chains ◽  
Poly Methyl Methacrylate ◽  
Molecular Weights ◽  
H Nmr ◽  
Reversible Addition ◽  
Living Controlled Radical Polymerization

AbstractPoly(methyl methacrylate) peroxide (PMMAP) was synthesized and used as the initiator in the reversible addition-fragmentation chain transfer (RAFT) polymerization. Methyl methacrylate (MMA) as the monomer and 2-cyanoprop-2-yl 1-dithionaphthalate (CPDN) as the chain transfer agent was used in the polymerization system. The polymerization was successfully initiated by PMMAP while maintaining features of “living”/controlled radical polymerization such as the number-average molecular weights (Mn) increasing linearly with the monomer conversions and low polydispersity index (PDI) values. The results of 1H NMR and IR spectra confirmed that a small quantity of polymer chains were derived from the PMMAP moieties. The PMMAP can also initiate the RAFT polymerization of styrene (St) and methyl acrylate (MA), and the polymerization proceeded in a “living”/controlled fashion.

Chain Length Dependent Termination Rate Coefficients of Methyl Methacrylate (MMA) in the Gel Regime:  Accessingkti,iUsing Reversible Addition-Fragmentation Chain Transfer (RAFT) Polymerization

2007 ◽  
Vol 40 (8) ◽  
pp. 2730-2736 ◽  
Author(s):  
Geoffrey Johnston-Hall ◽  
Martina H. Stenzel ◽  
Thomas P. Davis ◽  
Christopher Barner-Kowollik ◽  
Michael J. Monteiro
Keyword(s):  
Methyl Methacrylate ◽  
Chain Length ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Rate Coefficients ◽  
Termination Rate ◽  
Reversible Addition

Facile prepared bis(carbazyl thiocarbonyl) disulfide as chain transfer agent for RAFT polymerization of methyl methacrylate

2012 ◽  
Vol 126 (2) ◽  
pp. 740-748 ◽  
Author(s):  
Bin Liu ◽  
Liandong Deng ◽  
Chungang Guo ◽  
Ruiwei Guo ◽  
Anjie Dong ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Chain Transfer Agent
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