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

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

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Low-temperature reversible addition-fragmentation chain transfer (RAFT) polymerization of methyl methacrylate

Russian Journal of Applied Chemistry ◽

10.1134/s1070427214090171 ◽

2014 ◽

Vol 87 (9) ◽

pp. 1294-1299 ◽

Cited By ~ 1

Author(s):

E. Yu. Polozov ◽

S. D. Zaitsev ◽

Yu. D. Semchikov

Keyword(s):

Low Temperature ◽

Methyl Methacrylate ◽

Chain Transfer ◽

Raft Polymerization ◽

Reversible Addition

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Homopolymerizations of Methyl Methacrylate and Styrene: Chain Transfer Constants from the Mayo Equation and Number Distributions for Catalytic Chain Transfer, and the Chain Length Dependence of the Average Termination Rate Coefficient

Macromolecules ◽

10.1021/ma9612642 ◽

1997 ◽

Vol 30 (4) ◽

pp. 702-713 ◽

Cited By ~ 42

Author(s):

K. G. Suddaby ◽

D. R. Maloney ◽

D. M. Haddleton

Keyword(s):

Methyl Methacrylate ◽

Chain Length ◽

Chain Transfer ◽

Rate Coefficient ◽

Length Dependence ◽

Termination Rate ◽

Catalytic Chain Transfer

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Fundamentals of reversible addition–fragmentation chain transfer (RAFT)

Chemistry Teacher International ◽

10.1515/cti-2020-0026 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Catherine L. Moad ◽

Graeme Moad

Keyword(s):

Radical Polymerization ◽

Chain Length ◽

Molar Mass ◽

Chain Transfer ◽

Raft Polymerization ◽

Length Distribution ◽

Chain Length Distribution ◽

Reversible Addition ◽

Raft Agent ◽

End Group

Abstract Radical polymerization is transformed into what is known as reversible addition–fragmentation chain transfer (RAFT) polymerization by the addition of a RAFT agent. RAFT polymerization enables the preparation of polymers with predictable molar mass, narrow chain length distribution, high end-group integrity and provides the ability to construct macromolecules with the intricate architectures and composition demanded by modern applications in medicine, electronics and nanotechnology. This paper provides a background to understanding the mechanism of RAFT polymerization and how this technique has evolved.

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

Australian Journal of Chemistry ◽

10.1071/ch09064 ◽

2009 ◽

Vol 62 (3) ◽

pp. 254 ◽

Cited By ~ 29

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.

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

e-Polymers ◽

10.1515/epoly.2007.7.1.470 ◽

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.

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