Synthesis of Amphiphilic Block Copolypept(o)ides by Bifunctional Initiators: Making PeptoMicelles Redox Sensitive

2015 ◽  
Vol 36 (23) ◽  
pp. 2083-2091 ◽  
Author(s):  
Regina Holm ◽  
Kristina Klinker ◽  
Benjamin Weber ◽  
Matthias Barz
2004 ◽  
Vol 43 (20) ◽  
pp. 6382-6399 ◽  
Author(s):  
Apostolos Krallis ◽  
Costas Kotoulas ◽  
Stratos Papadopoulos ◽  
Costas Kiparissides ◽  
Jacques Bousquet ◽  
...  

1984 ◽  
Vol 12 (5) ◽  
Author(s):  
KimGyu Sik ◽  
Severian Dumitriu ◽  
Eugenia A ◽  
Cristofor Simionescu

2011 ◽  
Vol 1312 ◽  
Author(s):  
Tomomi Irita ◽  
Katsuhiko Imoto ◽  
Takabumi Nagai ◽  
Sadahito Aoshima

ABSTRACTWell-controlled fluorinated star-shaped polymers with oxyethylene units were designed and synthesized by living cationic polymerization. These fluorinated star-shaped polymers were prepared using successive fluorinated initiators to generate fluorinated, end-functionalized and hydrophilic segments with oxyethylene. Poly(vinyl ether)s with oxyethylene units are known to be thermo-responsive polymers that exhibit a lower critical solution temperature (LCST) in aqueous solutions. These novel fluorine-containing star-shaped polymers with oxyethylene were also thermo-responsive, as expected. In addition, the hetero-fluorinated star-shaped polymers with oxyethylene segments and different fluorine compositions were synthesized with various bifunctional initiators by living cationic polymerization having narrow molecular weight distributions (Mw/Mn=1.23−1.29) and contained very little, if any, presence of the linear homopolymer precursor, as evidenced by GPC. The LCST of this polymer depended on the end group fluorine composition and significant changes in cloud points were observed in water, as confirmed by static light scattering (SLS) measurements. As an example, aqueous solutions the star-shaped polymers without fluorine terminal groups showed no cloud point below up to 60 ºC in aqueous solution. After the fluoro-functionality was incorporated into the terminal groups, the cloud point of the aqueous solutions decreased to almost 20 ºC.


1987 ◽  
Vol 18 (1) ◽  
Author(s):  
C.I. Simionescu ◽  
Eugenia Comanita ◽  
Mariana Pastravanu ◽  
Aura-Angelica Popa

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