A polymerization-induced self-assembly process for all-styrenic nano-objects using the living anionic polymerization mechanism

2020 ◽  
Vol 11 (15) ◽  
pp. 2635-2639 ◽  
Author(s):  
Chengcheng Zhou ◽  
Jian Wang ◽  
Peng Zhou ◽  
Guowei Wang
Keyword(s):  
Diblock Copolymer ◽  
Anionic Polymerization ◽  
Self Assembly ◽  
Assembly Process ◽  
Living Anionic Polymerization ◽  
Polymerization Mechanism ◽  
Copolymer Poly

By combination of the living anionic polymerization (LAP) mechanism with the polymerization-induced self-assembly (PISA) technique, the all-styrenic diblock copolymer poly(p-tert-butylstyrene)-b-polystyrene (PtBS-b-PS) based LAP PISA was successfully developed.

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.

The important role of cosolvent in the amphiphilic diblock copolymer self-assembly process

Polymer ◽  
2019 ◽  
Vol 171 ◽  
pp. 1-7 ◽  
Author(s):  
Bing-Yu Li ◽  
Yan-Chun Li ◽  
Zhong-Yuan Lu
Keyword(s):  
Diblock Copolymer ◽  
Self Assembly ◽  
Assembly Process ◽  
Amphiphilic Diblock Copolymer

Fabrication of Nanohole Array via Nanodot Array Using Simple Self-Assembly Process of Diblock Copolymer

2007 ◽  
Vol 46 (6B) ◽  
pp. 3882-3885 ◽  
Author(s):  
Tsuyoshi Matsuyama ◽  
Yoshimasa Kawata
Keyword(s):  
Diblock Copolymer ◽  
Self Assembly ◽  
Assembly Process ◽  
Nanohole Array ◽  
Nanodot Array

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.

Preparation of periodic copolymers by living anionic polymerization mechanism assisted with a versatile programmed monomer addition mode

Polymer ◽  
2018 ◽  
Vol 137 ◽  
pp. 364-369 ◽  
Author(s):  
Zhiwei Zhao ◽  
Hongying Shen ◽  
Kunyan Sui ◽  
Guowei Wang
Keyword(s):  
Anionic Polymerization ◽  
Living Anionic Polymerization ◽  
Polymerization Mechanism

Hairy Particles Synthesized by Living Anionic Polymerization-Induced Self-Assembly and Evaluation of Their Nanostructure

2021 ◽  
Author(s):  
Toshiki Terao ◽  
Hibiki Shiraishi ◽  
Mikito Yamazaki ◽  
Teruaki Hayakawa ◽  
Noboru Ohta ◽  
...  
Keyword(s):  
Anionic Polymerization ◽  
Self Assembly ◽  
Living Anionic Polymerization

Synthesis of graft polymers with poly(isoprene) as main chain by living anionic polymerization mechanism

2012 ◽  
Vol 50 (24) ◽  
pp. 5144-5150 ◽  
Author(s):  
Tingting Tang ◽  
Jian Huang ◽  
Bing Huang ◽  
Junlian Huang ◽  
Guowei Wang
Keyword(s):  
Anionic Polymerization ◽  
Main Chain ◽  
Living Anionic Polymerization ◽  
Polymerization Mechanism ◽  
Graft Polymers
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