Synthesis of Well-Defined Homopolymer and Diblock Copolymer Grafted onto Silica Particles by Z-Supported RAFT Polymerization

2006 ◽  
Vol 39 (25) ◽  
pp. 8603-8608 ◽  
Author(s):  
Zhao ◽  
Sébastien Perrier
Keyword(s):  
Diblock Copolymer ◽  
Raft Polymerization ◽  
Silica Particles

Synthesis of Silica Particles Grafted with Well-Defined Living Polymeric Chains by Combination of RAFT Polymerization and Coupling Reaction

2009 ◽  
Vol 42 (15) ◽  
pp. 5509-5517 ◽  
Author(s):  
Youke Huang ◽  
Qiang Liu ◽  
Xiangdong Zhou ◽  
Sébastien Perrier ◽  
Youliang Zhao
Keyword(s):  
Raft Polymerization ◽  
Coupling Reaction ◽  
Silica Particles ◽  
Polymeric Chains

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.

Syntheses and morphologies of fluorinated diblock copolymer prepared via RAFT polymerization

2016 ◽  
Vol 189 ◽  
pp. 51-58 ◽  
Author(s):  
Bishnu P. Koiry ◽  
Siva Ponnupandian ◽  
Soumyadip Choudhury ◽  
Nikhil K. Singha
Keyword(s):  
Diblock Copolymer ◽  
Raft Polymerization

Towards smart self-assembly of colloidal silica particles through diblock copolymer crystallization

Polymer ◽  
2013 ◽  
Vol 54 (15) ◽  
pp. 3874-3881 ◽  
Author(s):  
Adriana M. Mihut ◽  
Jérôme J. Crassous ◽  
Jean-François Dechézelles ◽  
Sebastian Lages ◽  
Andreas Menzel ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Self Assembly ◽  
Colloidal Silica ◽  
Silica Particles
Sign in / Sign up

Export Citation Format

Share Document