Journal ArticleDOI
Visible Light-Mediated Polymerization-Induced Self-Assembly in the Absence of External Catalyst or Initiator
TLDR
In this article, the use of visible light to mediate a RAFT dispersion polymerization in the absence of external catalyst or initiator to yield nanoparticles of different morphologies according to a polymerization-induced self-assembly (PISA) mechanism was reported.Abstract:
We report the use of visible light to mediate a RAFT dispersion polymerization in the absence of external catalyst or initiator to yield nanoparticles of different morphologies according to a polymerization-induced self-assembly (PISA) mechanism. A POEGMA macro-chain transfer agent (macro-CTA) derived from a 4-cyano-4-((dodecylsulfanylthiocarbonyl)sulfanyl)pentanoic acid (CDTPA) RAFT agent can be activated under blue (460 nm, 0.7 mW/cm2) or green (530 nm, 0.7 mW/cm2) light and act simultaneously as a radical initiator, chain transfer agent, and particle stabilizer under ethanolic dispersion conditions. In particular, the formation of worm-like micelles was readily monitored by the increase of reaction viscosity during the polymerization; this method was shown to be particularly robust to different reaction parameters such as macro-CTAs of varying molecular weight. Interestingly, at high monomer conversion, different morphologies were formed depending on the wavelength of light employed, which may be due t...read more
Citations
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Journal ArticleDOI
Photomediated controlled radical polymerization
Xiangcheng Pan,Mehmet Atilla Tasdelen,Joachim Laun,Thomas Junkers,Thomas Junkers,Yusuf Yagci,Yusuf Yagci,Krzysztof Matyjaszewski +7 more
TL;DR: A comprehensive overview of the fundamentals and applications of various photomediated CRP techniques, including atom transfer radical polymerization, reversible addition-fragmentation chain transfer (RAFT), nitroxide mediated polymerization (NMP), and other procedures are discussed in this article.
Journal ArticleDOI
Emerging trends in polymerization-induced self-assembly
TL;DR: Alternative PISA protocols are paid particular attention to, which allow the preparation of nanoparticles with improved control over copolymer morphology and functionality, and have been optimized via high-throughput polymerization and recently evaluated within flow reactors for facile scale-up syntheses.
Journal ArticleDOI
RAFT‐mediated polymerization‐induced self‐assembly
TL;DR: This review will cover the fundamentals of the PISA mechanism and review some features and limitations of RAFT-mediated PISA in terms of the choice of the components involved, the nature of the nano-objects that is achievable, the morphologies that are accessible and how they can be controlled, and some potential applications.
Journal ArticleDOI
Photoinitiated Polymerization-Induced Self-Assembly (Photo-PISA): New Insights and Opportunities.
Jonathan Yeow,Cyrille Boyer +1 more
TL;DR: The purpose of this mini‐review is to examine some of these recent advances that have been made in Photo‐PISA processes, particularly in light of the specific advantages that may exist in comparison with conventional thermally initiated systems.
Journal ArticleDOI
Photo-responsive polymers: synthesis and applications
TL;DR: In this paper, the authors highlight the progress realized in recent years on light-responsive polymers and provide some guidelines towards the rational design of photo-responsive block copolymers and present the different photoresponsive moieties that have been used so far.
References
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Journal ArticleDOI
Visible‐light‐sensitive photoredox catalysis by iron complexes: Applications in cationic and radical polymerization reactions
Jing Zhang,Damien Campolo,Frédéric Dumur,Pu Xiao,Jean Pierre Fouassier,Didier Gigmes,Jacques Lalevée +6 more
TL;DR: In this article, a series of novel iron complexes have been synthesized and utilized to initiate the free radical promoted cationic polymerization of epoxides or to polymerize acrylates through photoredox catalysis processes upon exposure to near UV or visible violet (405 nm) light emitting diodes (LEDs).
Journal ArticleDOI
Ligand switch in photoinduced copper-mediated polymerization: synthesis of methacrylate–acrylate block copolymers
TL;DR: In this paper, photo-induced copper-mediated radical polymerization (photoCMP) was used to synthesize mixed acrylate/methacrylate (methyl acrylated, MA and methyl methacrylation, MMA) block copolymers.
Journal ArticleDOI
Molecular Weight Distributions in Free-Radical Polymerizations. 2. Low-Conversion Bulk Polymerization
TL;DR: In this paper, the authors measured the rates of methyl methacrylate and styrene at 50°C with AIBN as the initiator, and the time evolution of the full molecular weight distributions (MWDs) were measured by GPC.
Journal ArticleDOI
UV light-initiated RAFT polymerization induced self-assembly
TL;DR: In this article, reversible addition-fragmentation chain transfer (RAFT) initiated by UV light, as an environmentally friendly and easily manipulated method, is exploited as a new strategy to prepare polymeric micelles at room temperature.
Journal ArticleDOI
Polydispersity-Driven Block Copolymer Amphiphile Self-Assembly into Prolate-Spheroid Micelles
TL;DR: In this article, the authors examined the aqueous self-assembly behavior of polydisperse poly(ethylene oxide-b-1,4-butadiene)-b-ethylene Oxide (OBO) macromolecular triblock amphiphiles and observed the formation of American football-shaped micelles.