Block and Star Block Copolymers by Mechanism Transformation. 7. Synthesis of Polytetrahydrofuran/Poly(1,3-dioxepane)/Polystyrene ABC Miktoarm Star Copolymers by Combination of CROP and ATRP

2002 ◽  
Vol 35 (6) ◽  
pp. 2084-2089 ◽  
Author(s):  
Xiao-Shuang Feng ◽  
Cai-Yuan Pan
Keyword(s):  
Block Copolymers ◽  
Star Copolymers ◽  
Miktoarm Star ◽  
Star Block Copolymers

An easy way to the preparation of multi-miktoarm star block copolymers via sequential double click reactions

2010 ◽  
Vol 1 (5) ◽  
pp. 621 ◽  
Author(s):  
Aydan Dag ◽  
Hakan Durmaz ◽  
Volkan Kirmizi ◽  
Gurkan Hizal ◽  
Umit Tunca
Keyword(s):  
Block Copolymers ◽  
Click Reactions ◽  
Miktoarm Star ◽  
Star Block Copolymers

Miktoarm Star Copolymers from the Chemical Stitching of Associating Block Copolymers

2010 ◽  
Vol 43 (10) ◽  
pp. 4629-4637 ◽  
Author(s):  
Hongjing Dou ◽  
Liangzhi Hong ◽  
Guojun Liu
Keyword(s):  
Block Copolymers ◽  
Star Copolymers ◽  
Miktoarm Star

Preparation of miktoarm star-block copolymers PSn-b-PVAc4-n via combination of ATRP and RAFT polymerization

2010 ◽  
Vol 48 (22) ◽  
pp. 5180-5188 ◽  
Author(s):  
Yansheng Qiu ◽  
Wei Zhang ◽  
Yuefang Yan ◽  
Jian Zhu ◽  
Zhengbiao Zhang ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Raft Polymerization ◽  
Miktoarm Star ◽  
Star Block Copolymers

I5S Miktoarm Star Block Copolymers:  Packing Constraints on Morphology and Discontinuous Chevron Tilt Grain Boundaries

2001 ◽  
Vol 34 (26) ◽  
pp. 9069-9073 ◽  
Author(s):  
Lizhang Yang ◽  
Sheng Hong ◽  
Samuel P. Gido ◽  
Gabriel Velis ◽  
Nikos Hadjichristidis
Keyword(s):  
Block Copolymers ◽  
Grain Boundaries ◽  
Miktoarm Star ◽  
Star Block Copolymers

scholarly journals Novel Complex Polymers with Carbazole Functionality by Controlled Radical Polymerization

2012 ◽  
Vol 2012 ◽  
pp. 1-18 ◽  
Author(s):  
Kazuhiro Nakabayashi ◽  
Hideharu Mori
Keyword(s):  
Block Copolymers ◽  
Radical Polymerization ◽  
Three Dimensional ◽  
Controlled Radical Polymerization ◽  
Controlled Synthesis ◽  
Design And Synthesis ◽  
Star Copolymers ◽  
Novel Complex ◽  
Star Block Copolymers ◽  
Complex Polymers

This review summarizes recent advances in the design and synthesis of novel complex polymers with carbazole moieties using controlled radical polymerization techniques. We focus on the polymeric architectures of block copolymers, star polymers, including star block copolymers and miktoarm star copolymers, comb-shaped copolymers, and hybrids. Controlled radical polymerization ofN-vinylcarbazole (NVC) and styrene and (meth)acrylate derivatives having carbazole moieties is well advanced, leading to the well-controlled synthesis of complex macromolecules. Characteristic optoelectronic properties, assembled structures, and three-dimensional architectures are briefly introduced.

Star-Shaped Copolymers Based on Poly(N-vinylcaprolactam) and their Use as Nanocarriers of Methotrexate

2017 ◽  
Vol 70 (12) ◽  
pp. 1291 ◽  
Author(s):  
Norma A. Cortez-Lemus ◽  
Angel Licea-Claverie
Keyword(s):  
Polyethylene Glycol ◽  
Block Copolymers ◽  
Diblock Copolymers ◽  
Raft Polymerization ◽  
Drug Loading ◽  
Gel Permeation Chromatography ◽  
Solution Temperature ◽  
Star Copolymers ◽  
Vis Spectroscopy ◽  
Star Block Copolymers

Star-shaped poly(N-vinylcaprolactam)-block-poly(ethylhexylacrylate)-block-polyethylene glycol (PNVCL-b-PEHA-b-PEG) triblock copolymers and star-shaped poly(N-vinylcaprolactam)-block-polyethylene glycol (PNVCL-b-PEG) diblock copolymers were synthesized by reversible addition–fragmentation chain transfer (RAFT) polymerization. The resulting star block copolymers were characterized using 1H NMR and UV-vis spectroscopy, gel permeation chromatography, and dynamic light scattering. The star-shaped PNVCL-b-PEG and PNVCL-b-PEHA-b-PEG block copolymers self-assemble spontaneously into aggregates in water. The aggregates formed ranged from ~17 to 135 nm in diameter and were used to encapsulate methotrexate (MTX). It was observed that the aggregates from PNVCL-b-PEHA-b-PEG copolymers exhibited a higher drug loading and a lower release of MTX (19 wt-% and 54 %) as compared with star copolymers without PEHA (5 wt-% and 81 %) after 24 h at a temperature below their lower critical solution temperature values.

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