Journal ArticleDOI
Block Copolymers by Using Combined Controlled Radical and Radical Promoted Cationic Polymerization Methods
TLDR
In this article, a novel synthetic procedure for the preparation of block copolymers based on the combination of diphenylethene mediated controlled radical polymerization and radical promoted cationic polymerization is described.Abstract:
A novel synthetic procedure for the preparation of block copolymers based on the combination of diphenylethene (DPE) mediated controlled radical polymerization and radical promoted cationic polymerization is described. In the first step, the controlled polymerization of styrene (St) and methyl methacrylate (MMA) in presence of DPE yields polymers with various structures of diphenylethyl units in the main chain. Upon heating these prepolymers undergo scission to give polymeric radicals. Oxidation of these radicals by onium salts such as diphenyliodonium heaxfluorophosphate (Ph2I+PF6
−) and N-ethoxy-2-methylpyridinium hexafluorophosphate (EMP+PF6
−) yields reactive cations capable of initiating cationic polymerization of cyclohexene oxide (CHO). Block copolymer structure was confirmed by IR and NMR spectral measurements and GPC analysis.read more
Citations
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Journal ArticleDOI
Photoinitiated Polymerization: Advances, Challenges, and Opportunities
TL;DR: The use of photoinitiated polymerization is continuously growing in industry as reflected by the large number of applications in not only conventional areas such as coatings, inks, and adhesives but also high-tech domains, optoelectronics, laser imaging, stereolithography, and nanotechnology as mentioned in this paper.
Journal ArticleDOI
Mechanistic transformations involving living and controlled/living polymerization methods
Yusuf Yagci,M. Atilla Tasdelen +1 more
TL;DR: In this paper, a review of transformation reactions involving living and controlled/living polymerization methods is presented, including step-growth, conventional and controlled free radical, cationic, anionic, group transfer, activated monomer Ziegler-Natta and metathesis reactions.
Journal ArticleDOI
In-Situ Direct Mechanistic Transformation from RAFT to Living Cationic Polymerization for (Meth)acrylate−Vinyl Ether Block Copolymers
TL;DR: In this article, a trithiocarbonate-type reversible addition-fragmentation chain-transfer (RAFT) agent and an azo-initiator for RAFT polymerization of (meth)acrylates followed by the addition of a Lewis acid catalyst for the sequential living cationic block polymerisation of vinyl ethers.
Journal ArticleDOI
Photoinduced free radical promoted cationic polymerization 40 years after its discovery
TL;DR: In this article, different modes for the photochemical formation of electron donor radicals in the UV, Vis and NIR range that can be oxidized to reactive cations to initiate the cationic polymerization of oxiranes and vinyl monomers are discussed.
Journal ArticleDOI
Poly(styrene‐b‐tetrahydrofuran)/clay nanocomposites by mechanistic transformation
TL;DR: In this paper, the synthesis of polystyrene/montmorillonite (PSt/MMT) nanocomposite was described by mechanistic transformation from ATRP to cationic ring opening polymerization (CROP).
References
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Journal ArticleDOI
Controlled/Living Radical Polymerization
TL;DR: A review of the evolution of radical polymerization can be found in this article, which summarizes the materials that can now be prepared, and highlights some of the commercialization efforts currently underway.
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Mechanistic transformations involving living and controlled/living polymerization methods
Yusuf Yagci,M. Atilla Tasdelen +1 more