Y- and H-Shaped Amphiphilic PEG-PCL Block Copolymers Synthesized Combining Ring-Opening Polymerization and Click Chemistry: Characterization and Self-Assembly Behavior

2014 ◽  
Vol 215 (12) ◽  
pp. 1218-1229 ◽  
Author(s):  
Pasquale Tirino ◽  
Claudia Conte ◽  
Monica Ordegno ◽  
Rosario Palumbo ◽  
Francesca Ungaro ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Click Chemistry ◽  
Self Assembly ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Assembly Behavior

Preparation and characterization of stereocomplex aggregates based on PLA–P188–PLA

RSC Advances ◽  
2016 ◽  
Vol 6 (56) ◽  
pp. 50543-50552 ◽  
Author(s):  
Weiwei Zhang ◽  
Delong Zhang ◽  
Xiaoshan Fan ◽  
Guangyue Bai ◽  
Yuqin Jiang ◽  
...  
Keyword(s):  
Click Chemistry ◽  
Self Assembly ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Release Profile ◽  
The Self ◽  
Amphiphilic Copolymers ◽  
Assembly Behavior

Novel dumbbell-shaped amphiphilic copolymers based on P188 and PLA were synthesized by click chemistry and ring opening polymerization. The self-assembly behavior of the stereocomplexes and the DOX release profile from the aggregates were studied.

Poly(Ethylene Oxide)-B-Poly(ε-Caprolactone) Amphiphilic Block Copolymers: Synthesis and Self-Assembly

2011 ◽  
Vol 284-286 ◽  
pp. 1877-1885
Author(s):  
Ke Xin Kang ◽  
Min Ying Liu ◽  
Qing Xiang Zhao ◽  
Peng Fu ◽  
Xiao Bing Wang
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
Self Assembly ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Amphiphilic Block Copolymers ◽  
H Nmr ◽  
Transmission Electron ◽  
Particle Size Analyzer ◽  
Anionic Ring

A series of amphiphilic block copolymers mPEO-b-PCL with different PCL molecular weight were successfully prepared by combination of anionic ring-opening polymerization with coordination-insertion ring-opening polymerization. Firstly, the linear mPEO was prepared by anionic ring-opening copolymerization of EO with 2-(2-methoxyethoxy) ethoxide potassium as the small molecule initiators, then the mPEO as the macroinitiator was used to initiate the ring-opening polymerization of CL, in the absence of Sn(Oct)2 as the catalyst, and amphiphilic block copolymers mPEO-b-PCL were obtained. By changing the ratio of monomer and macroinitiator, prepared a series of different molecular weight mPEO-b-PCL. The structure of intermediates and final products were characterized by 1H NMR and GPC. The critical micelle concentration (cmc) of the final copolymer was measured. In addition, the sizes and morphologies of the obtained micelles at different PCL chains were studied with Laser nano-particle size analyzer and transmission electron microscopy (TEM).

scholarly journals Ring-opening polymerization-induced crystallization-driven self-assembly of poly-L-lactide-block-polyethylene glycol block copolymers (ROPI-CDSA)

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Paul J. Hurst ◽  
Alexander M. Rakowski ◽  
Joseph P. Patterson
Keyword(s):  
Molecular Structure ◽  
Polyethylene Glycol ◽  
Block Copolymers ◽  
Self Assembly ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
The Self ◽  
Assembly Mechanism ◽  
2D And 3D ◽  
Induced Crystallization

Abstract The self-assembly of block copolymers into 1D, 2D and 3D nano- and microstructures is of great interest for a wide range of applications. A key challenge in this field is obtaining independent control over molecular structure and hierarchical structure in all dimensions using scalable one-pot chemistry. Here we report on the ring opening polymerization-induced crystallization-driven self-assembly (ROPI-CDSA) of poly-L-lactide-block-polyethylene glycol block copolymers into 1D, 2D and 3D nanostructures. A key feature of ROPI-CDSA is that the polymerization time is much shorter than the self-assembly relaxation time, resulting in a non-equilibrium self-assembly process. The self-assembly mechanism is analyzed by cryo-transmission electron microscopy, wide-angle x-ray scattering, Fourier transform infrared spectroscopy, and turbidity studies. The analysis revealed that the self-assembly mechanism is dependent on both the polymer molecular structure and concentration. Knowledge of the self-assembly mechanism enabled the kinetic trapping of multiple hierarchical structures from a single block copolymer.

Self-Assembly of Single Chain Janus Nanoparticles from Azobenzene-Containing Block Copolymers and Reversible Photoinduced Morphology Transition

2021 ◽  
Author(s):  
Wei Wen ◽  
Aihua Chen
Keyword(s):  
Block Copolymers ◽  
Experimental Research ◽  
Self Assembly ◽  
The Self ◽  
Single Chain ◽  
Morphology Transition ◽  
Janus Nanoparticles ◽  
Assembly Behavior

Self-assembly of amphiphilic single chain Janus nanoparticles (SCJNPs) is a novel and promising approach to fabricate assemblies with diversified morphologies. However, the experimental research of the self-assembly behavior of SCJNPs...

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