This Perspective summarizes the features and limitations of reversible addition–fragmentation chain transfer (RAFT) polymerization, highlighting its strengths weaknesses, as our understanding process, from both a mechanistic an application point view, has matured over past 20 years. It is aimed at experts in field newcomers, including undergraduate postgraduate students, well nonexperts polymerization who are interested developing their own polymeric structures by exploiting simple setup...

Abstract Among the living radical polymerization techniques, reversible addition–fragmentation chain transfer (RAFT) and macromolecular design via interchange of xanthates (MADIX) polymerizations appear to be most versatile processes in terms reaction conditions, variety monomers for which can controlled, tolerance functionalities, range polymeric architectures that produced. This review highlights progress made RAFT/MADIX since first report 1998. It addresses, turn, mechanism kinetics...

ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication the EditorNEXTReversible Addition−Fragmentation Chain Transfer Polymerization: End Group Modification for Functionalized Polymers and Agent RecoverySébastien Perrier, Pittaya Takolpuckdee, Craig A. MarsView Author Information Department of Colour Polymer Chemistry, University Leeds, Leeds LS2 9JT, U.K. Cite this: Macromolecules 2005, 38, 6, 2033–2036Publication Date (Web):February 15, 2005Publication History Received19...

2-(Dimethylamino)ethyl methacrylate (DMAEMA) was polymerized from cellulosic filter paper via reversible addition−fragmentation chain transfer (RAFT) polymerization. The tertiary amino groups of the grafted PDMAEMA chains were subsequently quaternized with alkyl bromides different lengths (C8−C16) to provide a large concentration quaternary ammonium on cellulose surface. antibacterial activity and nonquaternized PDMAEMA-grafted fibers tested against Escherichia coli. found depend length...

A new synthesis of hyperbranched polymers is outlined. This paper presents the by recently highlighted thiol-yne reaction. In reaction, a catalytic amount photoinitiator and UV radiation are used to add two thiols across one alkyne bond at room temperature. work demonstrates how reaction can be form from both small organic molecules polymeric chains bearing an thiol. The UV-catalyzed fast, forming high-molecular-weight after 20 min irradiation. Hyperbranched made have potential serve as...

We describe an optimized method to prepare multiblock copolymers. The approach is based on our previously reported use of reversible addition–fragmentation chain transfer (RAFT) polymerization, which here has been into a fast, versatile, efficient, and scalable process. one-pot, multistep sequential polymerization proceeds in water, quantitative yields (>99%) for each monomer addition, thus circumventing requirements intermediate purification, 2 h per block. optimization the process...

Artificial light-harvesting systems in aqueous media which mimic nature are of significant importance; however, they often restrained by the solubility and undesired aggregation-caused quenching effect hydrophobic chromophores. Here, we report a generalized strategy toward construction efficient artificial based on supramolecular peptide nanotubes water. By molecularly aligning chromophores along slipped manner, an system with two-step sequential Förster resonance energy transfer process is...

The reversible addition fragmentation chain transfer (RAFT) bulk polymerization of a fast propagating monomer (methyl acrylate, MA) has been studied using 1-phenylethyl dithiobenzoate (1-PEDB) and 2-(2-cyanopropyl) (CPDB) as RAFT agents at 60 °C. Rate retardation with increasing initial agent concentrations is common to both 1-PEDB- CPDB-mediated MA polymerizations occurs in comparable magnitude. A pronounced inhibition period observed 1-PEDB-mediated polymerizations, whereas the...

Reversible addition fragmentation chain transfer (RAFT) polymerization was used for the first time to produce poly(methyl methacrylate) hyperbranched polymers via one-pot copolymerization of methyl methacrylate (MMA) and ethylene glycol dimethacrylate, mediated by 2-(2-cyanopropyl) dithiobenzoate. Hyperbranched structures were characterized 1H NMR spectroscopy, size exclusion chromatography (SEC), thermal analyses. Monomer conversions molecular weight distributions (PMMA) prepared RAFT are...

Abstract We examine the reversible addition fragmentation chain transfer (RAFT) process with regard to its potential and limits in future industrial applications (including those conducted on a larger scale) as well materials science. The outlook for RAFT is bright: Its unrivaled inherent simplicity coupled wide tolerance monomer classes functionalities makes it prime candidate use large reactors. At same time, allows ready access complex macromolecular architectures of variable shape size....

Reversible addition−fragmentation chain transfer (RAFT) polymerization was used to control the grafting of styrene from a cellulose substrate. The hydroxyl groups fiber were converted into thiocarbonyl-thio agent, and further mediate RAFT styrene. graft copolymers analyzed by gravimetry, attenuated total reflectance Fourier transform infrared spectroscopy, contact angle measurements, scanning electron microscopy, differential calorimetry, thermogravimetry. results obtained these analytical...

We report the syntheses and uses of versatile chain transfer agents (CTAs) that produce well-controlled macromolecular architectures with specific chain-end functionalities, via reversible addition fragmentation (RAFT) polymerization). Examples are given, including amphiphilic copolymers block incorporating a biodegradable block. These CTAs also used for grafting poly(styrene), poly(methyl methacrylate) acrylate) from cotton.

This perspective presents the state-of-the-art techniques to synthesize highly branched polymers such as dendrimers and hyperbranched with well-defined linear chains between branch points. These are essentially long-chain analogues of conventional have been given many names, including dendrimer-like, DendriMac, HyperMac, etc. We cover various synthetic strategies: direction synthesis (i.e., core outward or periphery inward) building polymer either through iterative chain growth/branching...

Abstract Precise control over the location of monomers in a polymer chain has been described as ‘Holy Grail’ synthesis. Controlled growth polymerization techniques have brought this goal closer, allowing preparation multiblock copolymers with ordered sequences functional monomers. Such structures promising applications ranging from medicine to materials engineering. Here we show, however, that statistical nature places strong limits on can be obtained. We demonstrate monomer locations are...

Monodisperse silica particles (SiPs) were surface-modified with a newly designed reversible addition–fragmentation chain transfer (RAFT) agent having triethoxysilane moiety, 6-(triethoxysilyl) 2-(((methylthio)carbonothioyl)thio)-2-phenylacetate (EHT). Surface-initiated RAFT polymerization of styrene was carried out the EHT-modified SiPs in presence free agent. The proceeded living manner, producing coated well-defined polystyrene target molecular weight graft density as high 0.3 chains/nm2....

A remarkably efficient and versatile procedure for the preparation of multiblock copolymers is presented.

We report the synthesis by reversible addition–fragmentation chain transfer process of well-defined decablock polymers with a final dispersity as low 1.15 and fraction living high 97% after 10 successful block extensions, each taken to >99% monomer conversion. By using model homopolymers poly(N,N-dimethylacrylamide) poly(4-acryloylmorpholine) relatively DP (10 units per in average), we describe theoretical experimental considerations required access high-order multiblock copolymers excellent...