Synthesis of a novel structural triblock copolymer of poly(γ -benzyl-l-glutamic acid)-b-poly(ethylene oxide)-b-poly(ε-caprolactone)

Biomaterials ◽  
2004 ◽  
Vol 25 (17) ◽  
pp. 3553-3558 ◽  
Author(s):  
Mingxiao Deng ◽  
Rong Wang ◽  
Guangzhuo Rong ◽  
Jingru Sun ◽  
Xuefei Zhang ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Glutamic Acid ◽  
Triblock Copolymer ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Stealth properties of poly(ethylene oxide)-based triblock copolymer micelles: A prerequisite for a pH-triggered targeting system

2011 ◽  
Vol 7 (10) ◽  
pp. 3700-3707 ◽  
Author(s):  
K. Van Butsele ◽  
M. Morille ◽  
C. Passirani ◽  
P. Legras ◽  
J.P. Benoit ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Triblock Copolymer ◽  
Poly Ethylene Oxide ◽  
Copolymer Micelles ◽  
Poly Ethylene

Cluster–Micelle Transition of a Thermo- and Photoresponsive ABC Triblock Copolymer in an Ionic Liquid

2019 ◽  
Vol 72 (2) ◽  
pp. 155
Author(s):  
Aya Saruwatari ◽  
Kei Hashimoto ◽  
Ryota Tamate ◽  
Ryoji Usui ◽  
Hisashi Kokubo ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Transition Temperature ◽  
Ethylene Oxide ◽  
Uv Irradiation ◽  
Low Temperatures ◽  
Triblock Copolymer ◽  
Abc Triblock Copolymer ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Azobenzene Groups

We report the photocontrollable micelle–cluster transition of an ABC-type triblock copolymer in an ionic liquid (IL). Polystyrene-b-poly(ethylene oxide)-b-poly(4-phenylazobenzyl acrylamide-r-N-isopropylacrylamide) (PSt-b-PEO-b-P(AzoBnAm-r-NIPAm)) was synthesised, where PSt is IL-phobic, PEO is IL-philic, and P(AzoBnAm-r-NIPAm) is photo- and thermoresponsive in the IL. At high temperatures, the triblock copolymer forms micelles with PSt cores; furthermore, at low temperatures, micelles self-assemble into clusters induced by the aggregation of P(AzoBnAm-r-NIPAm). Under UV irradiation, the micelles form clusters at lower temperatures than that in the dark because of the change in the solubility of P(AzoBnAm-r-NIPAm) induced by photoisomerisation of the azobenzene groups, indicating that this triblock copolymer has a photocontrollable micelle–cluster transition temperature.

Preparation of Gold Nanocrystals Having Various Morphologies under Polymeric Bulk Phase

2014 ◽  
Vol 548-549 ◽  
pp. 321-325
Author(s):  
Sang Ho Cha
Keyword(s):  
Ethylene Oxide ◽  
Functional Groups ◽  
Triblock Copolymer ◽  
Triblock Copolymers ◽  
Synthetic Approach ◽  
Gold Nanocrystals ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Poly Propylene ◽  
Polymeric Template

A novel synthetic approach for gold nanocrystals using triblock copolymer as a polymeric template was described. The triblock copolymer used in this study was poly (ethylene oxide)20-poly (propylene oxide)70-poly (ethylene oxide)20 with hydroxy or thiol end-functional groups. The complexes of HAuCl4 and triblock copolymers were prepared by mixing and drying. After exposed to the sunlight for a few days, the gold nanocrystals, which have different sizes and shapes according to the ripening time, end functional groups, and gold salt concentrations, were obtained. The optical properties of the gold nanocrystals were also discussed.

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