نتایج جستجو برای: reversible chain transfer catalyzed polymerization

تعداد نتایج: 687415  

Journal: :Chimia 2023

Reversing controlled radical polymerization and regenerating the monomer has been a long-standing challenge for fundamental research practical applications. Herein, we report highly efficient depolymerization method various polymethacrylates synthesized by reversible addition-fragmentation chain-transfer (RAFT) polymerization. The process, which does not require any catalyst, exhibits near-quan...

Journal: :E3S web of conferences 2023

Polymeric vesicles with tertiary amine and epoxy functional groups were fabricated via the reversible addition-fragmentation chain transfer (RAFT) dispersion polymerization of 2-(diisopropylamino) ethyl methacrylate (DIPEMA) glycidyl (GlyMA) in an ethanol-water mixture by using poly (ethylene oxide)-4-(4-Cyanopentanoic acid) dithiobenzoate (mPEG45-CPADB) as macro-chain-transfer agent (macro-CTA...

2015
Scott C. Radzinski Jeffrey C. Foster John B. Matson

A novel dithiocarbamate chain transfer agent (CTA1) with a directly polymerizable Z-group was synthesized for use in reversible addition–fragmentation chain transfer polymerization (RAFT). This CTA effectively mediated RAFT polymerization of styrenic and acrylic monomers with dispersities (Đ) < 1.08. Utilizing the polymerizable Z-group on the ω-chain end that is inherited from the RAFT process,...

Journal: :European Polymer Journal 2021

The synthesis of a linear polyisobutylene is achieved for the first time by free radical polymerization. reaction was performed in environmentally friendly conditions, i.e., an aqueous medium using cyclodextrin solubilizer, around room temperature. This mild and straightforward polymerization resulted predominantly polymer with low dispersity. Isobutylene also copolymerized acrylamide via this ...

Journal: :Macromolecular Chemistry and Physics 2023

Front Cover: In article 2200259 by Katja Loos and Aldo Altomare, the light-catalyzed atom transfer radical polymerization (ATRP) of PVDF-based block copolymers with methyl methacrylate using five different organic photoredox catalysts (OPRC) is reported. The authors prove how three OPRC operating through an oxidative quenching pathway offer a good control over process. They also achieve success...

2012
Ching Yeh Lin Michelle L. Coote

Ab initio molecular orbital theory has been used to study and explain the effects of chain length on the addition– fragmentation equilibrium constant in reversible addition–fragmentation chain transfer (RAFT) polymerization. New data is presented for azobisisobutyronitrile-initiated t-butyl dithiobenzoate-mediated polymerization of methyl methacrylate, and 2-(((ethylthio)carbonothioyl)thio)prop...

2015
Li Qun Xu Ning Ning Li Bin Zhang Jiu Cun Chen Nicolay Tsarevsky

The preparation of PEGylated fluorescent nanoparticles (NPs) based on atom transfer radical polymerization (ATRP) and “click chemistry” in one-pot synthesis is presented. First, poly(p-chloromethyl styrene-alt-N-propargylmaleimide) (P(CMS-alt-NPM)) copolymer was prepared via reversible addition-fragmentation chain transfer (RAFT) polymerization. Subsequently, the azido-containing fluorene-based...

2016
Hidetaka Tobita

Abstract: When the size of a polymerization locus is smaller than a few hundred nanometers, such as in miniemulsion polymerization, each locus may contain no more than one key-component molecule, and the concentration may become much larger than the corresponding bulk polymerization, leading to a significantly different rate of polymerization. By focusing attention on the component having the l...

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