Synthesis, self-assembly behavior, and biological application of a new photochromic azo amphiphilic diblock copolymer

2011 ◽  
Vol 51 (8) ◽  
pp. 1662-1668 ◽  
Author(s):  
Han Ding ◽  
Zheng Wang ◽  
Lijiao Sheng ◽  
Gongwu Song
Keyword(s):  
Diblock Copolymer ◽  
Self Assembly ◽  
Biological Application ◽  
Amphiphilic Diblock Copolymer ◽  
Assembly Behavior

scholarly journals Synthesis and self-assembly of a novel amphiphilic diblock copolymer consisting of isotactic polystyrene and 1,4-trans-polybutadiene-graft-poly(ethylene oxide)

RSC Advances ◽  
2018 ◽  
Vol 8 (23) ◽  
pp. 12752-12759
Author(s):  
HuaQing Liang ◽  
QiHua Zhou ◽  
YongJiang Long ◽  
WanChu Wei ◽  
Shuo Feng ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Diblock Copolymer ◽  
Self Assembly ◽  
Amphiphilic Diblock Copolymer ◽  
Isotactic Polystyrene ◽  
Poly Ethylene Oxide ◽  
Assembly Behavior ◽  
Poly Ethylene

Herein, a novel amphiphilic diblock copolymer consisting of isotactic polystyrene and 1,4-trans-polybutadiene-graft-poly(ethylene oxide) was synthesized and its self-assembly behavior was investigated.

scholarly journals Self-Assembly Behavior of Amphiphilic Diblock Copolymer PS-b-P4VP in CO2-Expanded Liquids

2018 ◽  
Vol 34 (8) ◽  
pp. 945-951
Author(s):  
Xiaomeng CHENG ◽  
◽  
Dongxia JIAO ◽  
Zhihao LIANG ◽  
Jinjin WEI ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Self Assembly ◽  
Amphiphilic Diblock Copolymer ◽  
Ps I ◽  
Assembly Behavior

scholarly journals Unique aqueous self-assembly behavior of a thermoresponsive diblock copolymer

2020 ◽  
Vol 11 (2) ◽  
pp. 396-402 ◽  
Author(s):  
Sarah J. Byard ◽  
Cate T. O'Brien ◽  
Matthew J. Derry ◽  
Mark Williams ◽  
Oleksandr O. Mykhaylyk ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Diblock Copolymer ◽  
Self Assembly ◽  
Amphiphilic Diblock Copolymer ◽  
Assembly Behavior

A new amphiphilic diblock copolymer prepared via polymerization-induced self-assembly forms spheres, worms, vesicles or lamellae in aqueous solution on adjusting the temperature.

Synthesis of poly(methyl methacrylate)-b-poly(acrylic acid) by DPE method

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Dong Chen ◽  
Ruixue Liu ◽  
Zhifeng Fu ◽  
Yan Shi
Keyword(s):  
Molecular Weight ◽  
Acrylic Acid ◽  
Methyl Methacrylate ◽  
Diblock Copolymer ◽  
Self Assembly ◽  
Gel Permeation Chromatography ◽  
Amphiphilic Diblock Copolymer ◽  
Poly Methyl Methacrylate ◽  
Copolymer Poly ◽  
Poly Acrylic Acid

AbstractAmphiphilic diblock copolymer poly(methyl methacrylate)-b-poly(acrylic acid) (PMMA-b-PAA) was prepared by 1,1-diphenylethene (DPE) method. Firstly, free radical polymerization of methyl methacrylate was carried out with AIBN as initiator in the presence of DPE, giving a DPE-containing PMMA precursor with controlled molecular weight. tert-Butyl acrylate (tBA) was then polymerized in the presence of the PMMA precursor, and PMMA-b-PtBA diblock copolymer with controlled molecular weight was prepared. Finally, amphiphilic diblock copolymer PMMA-b-PAA was obtained by hydrolysis of PMMA-b-PtBA. The formation of PMMA-b-PAA was confirmed by 1H NMR spectrum and gel permeation chromatography. Transmission electron microscopy and dynamic light scattering were used to detect the self-assembly behavior of the amphiphilic diblock polymers in methanol.

Reproducible Access to Tunable Morphologies via the Self-Assembly of an Amphiphilic Diblock Copolymer in Water

2015 ◽  
Vol 4 (4) ◽  
pp. 381-386 ◽  
Author(s):  
Nghia P. Truong ◽  
John F. Quinn ◽  
Marion V. Dussert ◽  
Nikolle B. T. Sousa ◽  
Michael R. Whittaker ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Self Assembly ◽  
The Self ◽  
Amphiphilic Diblock Copolymer

scholarly journals Synthesis and Self-Assembly of Multistimulus-Responsive Azobenzene-Containing Diblock Copolymer through RAFT Polymerization

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2028
Author(s):  
Po-Chih Yang ◽  
Yueh-Han Chien ◽  
Shih-Hsuan Tseng ◽  
Chia-Chung Lin ◽  
Kai-Yu Huang
Keyword(s):  
Uv Irradiation ◽  
Diblock Copolymer ◽  
Self Assembly ◽  
Raft Polymerization ◽  
Solution Temperature ◽  
Micellar Aggregates ◽  
Before And After ◽  
Assembly Behavior ◽  
Copolymer Poly ◽  
Polymer Aqueous Solution

This paper gathered studies on multistimulus-responsive sensing and self-assembly behavior of a novel amphiphilic diblock copolymer through a two-step reverse addition-fragmentation transfer (RAFT) polymerization technique. N-Isopropylacrylamide (NIPAM) macromolecular chain transfer agent and diblock copolymer (poly(NIPAM-b-Azo)) were discovered to have moderate thermal decomposition temperatures of 351.8 and 370.8 °C, respectively, indicating that their thermal stability was enhanced because of the azobenzene segments incorporated into the block copolymer. The diblock copolymer was determined to exhibit a lower critical solution temperature of 34.4 °C. Poly(NIPAM-b-Azo) demonstrated a higher photoisomerization rate constant (kt = 0.1295 s−1) than the Azo monomer did (kt = 0.088 s−1). When ultraviolet (UV) irradiation was applied, the intensity of fluorescence gradually increased, suggesting that UV irradiation enhanced the fluorescence of self-assembled cis-isomers of azobenzene. Morphological aggregates before and after UV irradiation are shown in scanning electron microscopy (SEM) and dynamic light scattering (DLS) analyses of the diblock copolymer. We employed photoluminescence titrations to reveal that the diblock copolymer was highly sensitive toward Ru3+ and Ba2+, as was indicated by the crown ether acting as a recognition moiety between azobenzene units. Micellar aggregates were formed in the polymer aqueous solution through dissolution; their mean diameters were approximately 205.8 and 364.6 nm at temperatures of 25.0 and 40.0 °C, respectively. Our findings contribute to research on photoresponsive and chemosensory polymer material developments.

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