Synthesis of a doubly thermo-responsive schizophrenic diblock copolymer based on poly[N-(4-vinylbenzyl)-N,N-diethylamine] and its temperature-sensitive flip-flop micellization

2014 ◽  
Vol 5 (12) ◽  
pp. 3910-3918 ◽  
Author(s):  
Shentong Li ◽  
Fei Huo ◽  
Quanlong Li ◽  
Chengqiang Gao ◽  
Yang Su ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Butyl Methacrylate ◽  
Temperature Sensitive ◽  
Flip Flop ◽  
Copolymer Poly

A doubly thermo-responsive schizophrenic diblock copolymer, poly(tert-butyl methacrylate)-block-poly[N-(4-vinylbenzyl)-N,N-diethylamine], was synthesized and its flip-flop micellization was demonstrated.

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.

Confined Nucleation and Crystallization Kinetics in Lamellar Crystalline–Amorphous Diblock Copolymer Poly(ε-caprolactone)-b-poly(4-vinylpyridine)

2015 ◽  
Vol 48 (6) ◽  
pp. 1804-1812 ◽  
Author(s):  
Lanlan Chen ◽  
Jing Jiang ◽  
Lai Wei ◽  
Xiaoliang Wang ◽  
Gi Xue ◽  
...  
Keyword(s):  
Crystallization Kinetics ◽  
Diblock Copolymer ◽  
Copolymer Poly ◽  
Confined Nucleation

Extended Self-Assembled Long Periodicity and Zig-Zag Domains from Helix–Helix Diblock Copolymer Poly(γ-benzyl-l-glutamate)-block-poly(O-benzyl-l-hydroxyproline)

2014 ◽  
Vol 15 (11) ◽  
pp. 3923-3930 ◽  
Author(s):  
Manos Gkikas ◽  
Johannes S. Haataja ◽  
Jani Seitsonen ◽  
Janne Ruokolainen ◽  
Olli Ikkala ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Extended Self ◽  
Self Assembled ◽  
Copolymer Poly

A biocompatible cobaltporphyrin-based complex micelle constructed via supramolecular assembly for oxygen transfer

2016 ◽  
Vol 4 (5) ◽  
pp. 857-862 ◽  
Author(s):  
Liangliang Shen ◽  
Rui Qu ◽  
Hejin Shi ◽  
Fan Huang ◽  
Yingli An ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Diblock Copolymer ◽  
Oxygen Transfer ◽  
Supramolecular Assembly ◽  
Poly Ethylene Glycol ◽  
Hierarchical Assembly ◽  
Poly Ethylene ◽  
Copolymer Poly

Herein, a complex micelle as an oxygen nano-carrier is constructed through the hierarchical assembly of the diblock copolymer poly(ethylene glycol)-block-poly(l-lysine) (PEG-b-PLys), tetrakis(4-sulfonatophenyl)porphinato cobalt(ii) (Co(ii)TPPS), a heptapeptide (Cys-His-His-His-His-His-His) and heptakis(2,3,6-tri-O-methyl)-β-cyclodextrin (TM-β-CD).

A glucose-based diblock copolymer: synthesis, characterization and its injectable/temperature-sensitive behaviors

2014 ◽  
Vol 21 (4) ◽  
Author(s):  
Yanfeng Tang ◽  
Sumei Zhang ◽  
Miao Wang ◽  
Jinli Zhu ◽  
Tongming Sun ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Temperature Sensitive

Non-aqueous polymer dispersions: radical dispersion polymerization in the presence of the diblock copolymer poly(styrene-b-[ethylene-co-propylene])

1986 ◽  
Vol 264 (7) ◽  
pp. 616-618 ◽  
Author(s):  
J. V. Dawkins ◽  
G. G. Maghami ◽  
S. A. Shakir ◽  
J. S. Higgins
Keyword(s):  
Diblock Copolymer ◽  
Dispersion Polymerization ◽  
Aqueous Polymer ◽  
Copolymer Poly ◽  
Polymer Dispersions

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.

scholarly journals Synthesis of Diblock copolymer poly-3-hydroxybutyrate -block-poly-3-hydroxyhexanoate [PHB-b-PHHx] by a β-oxidation weakened Pseudomonas putida KT2442

2012 ◽  
Vol 11 (1) ◽  
pp. 44 ◽  
Author(s):  
Lakshmi Tripathi ◽  
Lin-Ping Wu ◽  
Jinchun Chen ◽  
Guo-Qiang Chen
Keyword(s):  
Pseudomonas Putida ◽  
Diblock Copolymer ◽  
Copolymer Poly
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