scholarly journals One-pot synthesis of block-copolyrotaxanes through controlled rotaxa-polymerization

2017 ◽  
Vol 13 ◽  
pp. 1310-1315 ◽  
Author(s):  
Jessica Hilschmann ◽  
Gerhard Wenz ◽  
Gergely Kali
Keyword(s):  
Chain Transfer ◽  
Triblock Copolymers ◽  
Raft Polymerization ◽  
Aqueous Solubility ◽  
One Pot ◽  
Polymer Backbone ◽  
One Pot Synthesis ◽  
Reversible Addition ◽  
First Time ◽  
Polymerization Conditions

The aqueous reversible addition fragmentation chain-transfer (RAFT) copolymerization of isoprene and bulky comonomers, an acrylate and an acrylamide in the presence of methylated β-cyclodextrin was employed for the first time to synthesize block-copolyrotaxanes. RAFT polymerizations started from a symmetrical bifunctional trithiocarbonate and gave rise to triblock-copolymers where the outer polyacrylate/polyacrylamide blocks act as stoppers for the cyclodextrin rings threaded onto the inner polyisoprene block. Statistical copolyrotaxanes were synthesized by RAFT polymerization as well. RAFT polymerization conditions allow control of the composition as well as the sequence of the constituents of the polymer backbone which further effects the CD content and the aqueous solubility of the polyrotaxane.

scholarly journals Fabrication of low-fouling, high-loading polymeric surfaces through pH-controlled RAFT

RSC Advances ◽  
2020 ◽  
Vol 10 (34) ◽  
pp. 20302-20312
Author(s):  
Alexander H. Jesmer ◽  
Vincent Huynh ◽  
Ryan G. Wylie
Keyword(s):  
Chain Transfer ◽  
Raft Polymerization ◽  
High Loading ◽  
One Pot ◽  
Polymeric Surfaces ◽  
One Pot Synthesis ◽  
Reversible Addition ◽  
Ph Controlled

pH-Controlled surface-reversible addition–fragmentation chain-transfer (S-RAFT) polymerization yields a one-pot synthesis for bimodal polymeric surfaces for improved capture agent immobilization.

Sensitive electrochemiluminescence analysis of lung cancer marker miRNA-21 based on RAFT signal amplification

2022 ◽  
Author(s):  
Qingyu Wang ◽  
Shuaibing Yu ◽  
Lianshun Zhang ◽  
Lei Wang ◽  
Jinming Kong ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Functional Groups ◽  
Signal Amplification ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Polymer Chains ◽  
Cancer Marker ◽  
Reversible Addition ◽  
First Time

An electrochemiluminescence approach based on surface-initiated reversible addition-fragmentation chain transfer (SI-RAFT) was developed for miRNA-21 detection for the first time. The SI-RAFT polymerization generates polymer chains with functional groups that...

Synthesis, self-assembly and self-healing properties of organic–inorganic ABA triblock copolymers with poly(POSS acrylate) endblocks

2019 ◽  
Vol 10 (19) ◽  
pp. 2424-2435 ◽  
Author(s):  
Bingjie Zhao ◽  
Sen Xu ◽  
Sixun Zheng
Keyword(s):  
Self Assembly ◽  
Triblock Copolymer ◽  
Chain Transfer ◽  
Triblock Copolymers ◽  
Raft Polymerization ◽  
Self Healing ◽  
Reversible Addition ◽  
Aba Triblock Copolymer

A novel organic–inorganic ABA triblock copolymer with a poly(acrylate amide) (PAA) midblock and poly(POSS acrylate) [P(POSS)] endblocks was synthesized via sequential reversible addition–fragmentation chain transfer (RAFT) polymerization.

One-Pot Hyperbranched Polymer Synthesis Mediated by Reversible Addition Fragmentation Chain Transfer (RAFT) Polymerization

2005 ◽  
Vol 38 (6) ◽  
pp. 2131-2136 ◽  
Author(s):  
Bailing Liu ◽  
Algy Kazlauciunas ◽  
James T Guthrie ◽  
Sébastien Perrier
Keyword(s):  
Hyperbranched Polymer ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Polymer Synthesis ◽  
One Pot ◽  
Reversible Addition

One-pot polymer brush synthesis via simultaneous isocyanate coupling chemistry and “grafting from” RAFT polymerization

2014 ◽  
Vol 5 (8) ◽  
pp. 2816-2823 ◽  
Author(s):  
S. P. Le-Masurier ◽  
G. Gody ◽  
S. Perrier ◽  
A. M. Granville
Keyword(s):  
Chain Transfer ◽  
Raft Polymerization ◽  
Polymer Brush ◽  
One Pot ◽  
Reversible Addition ◽  
Raft Agent ◽  
Grafting From

One-pot ‘grafting from’ of polystyrene on polydopamine particles was investigated using a newly developed carbonyl-azide reversible addition–fragmentation chain transfer (RAFT) agent.

Preparation of Thermo-Sensitive Supramolecular Hydrogels Formed from MPEG-b-PNIPAM-b-MPEG Triblock Copolymer with α-Cyclodextrin

2014 ◽  
Vol 934 ◽  
pp. 75-79 ◽  
Author(s):  
Xiao Feng Ye ◽  
Mi Zhou ◽  
Jing Ying Hu ◽  
Xin Qian
Keyword(s):  
Triblock Copolymer ◽  
Chain Transfer ◽  
Triblock Copolymers ◽  
Raft Polymerization ◽  
Inclusion Complexation ◽  
Gel Permeation Chromatography ◽  
H Nmr ◽  
Reversible Addition ◽  
Response Interval ◽  
Gel Permeation

To develop a new drug delivery matrix with the suitable responsive interval, a well-defined triblock copolymer MPEG-b-PNIPAM-b-MPEG was synthesized by reversible addition fragmentation chain transfer (RAFT) polymerization. Then, the supramolecular hydrogels were fabricated via inclusion complexation with α-cyclodextrin (α-CD) and the triblock copolymers in aqueous solutions. The triblock copolymers were characterized by 1H NMR and gel permeation chromatography (GPC), and the supramolecular structures of hydrogels was confirmed by DSC. The resultant hydrogels was found to be thermo-sensitive, and the response interval could be modulated by controlling the content of PNIPAM.

scholarly journals Thermoresponsive and Redox Behaviors of Poly(N-isopropylacrylamide)-Based Block Copolymers Having TEMPO Groups as Their Side Chains

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Toru Uemukai ◽  
Tomoya Hioki ◽  
Manabu Ishifune
Keyword(s):  
Block Copolymers ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Solution Temperature ◽  
Thermoresponsive Polymer ◽  
Critical Solution Temperature ◽  
Redox Active ◽  
Reversible Addition ◽  
Polymerization Conditions ◽  
Active Block

Thermoresponsive and redox-active block copolymers having 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) moieties have been synthesized by using the reversible addition-fragmentation chain transfer (RAFT) polymerization technique.N-Isopropylacrylamide (NIPAAm) and 2,2,6,6-tetramethylpiperidyl methacrylate (TEMPMA) monomers were copolymerized stepwise under RAFT polymerization conditions to afford the thermoresponsive block copolymers, PNIPAAm-block-PTEMPMA and PNIPAAm-block-PTEMPMA-block-PNIPAAm. Oxidation of tetramethylpiperidine groups in the copolymers successfully afforded the corresponding TEMPO-containing block copolymers. The resulting triblock copolymer was found to be thermoresponsive showing lower critical solution temperature (LCST) at 34∘C in its aqueous solution. Redox behavior of the resulting copolymer was observed by cyclic voltammetry. The potential of anodic current peak changed below and above the LCST of the block copolymer. These results indicate that the phase transition of thermoresponsive polymer influences the redox potential of TEMPO moieties.

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