scholarly journals Vesicles of double hydrophilic pullulan and poly(acrylamide) block copolymers: a combination of synthetic- and bio-derived blocks

2017 ◽  
Vol 8 (7) ◽  
pp. 1244-1254 ◽  
Author(s):  
Jochen Willersinn ◽  
Anna Bogomolova ◽  
Marc Brunet Cabré ◽  
Bernhard V. K. J. Schmidt
Keyword(s):  
Aqueous Solution ◽  
Block Copolymers ◽  
Diblock Copolymers ◽  
Poly Acrylamide

The formation of vesicular structures with average diameters from 200 to 300 nm consisting of double hydrophilic diblock copolymers pullulan-b-poly(N,N-dimethylacrylamide) and pullulan-b-poly(N-ethylacrylamide) in aqueous solution is described.

Mechanical and Structural Consequences of Associative Dynamic Cross-Linking in Acrylic Diblock Copolymers

2019 ◽  
Author(s):  
Jacob Ishibashi ◽  
Yan Fang ◽  
Julia Kalow
Keyword(s):  
Block Copolymers ◽  
Rheological Properties ◽  
Diblock Copolymers ◽  
Cross Linking ◽  
Statistical Copolymer

<p>Block copolymers are used to construct covalent adaptable networks that employ associative exchange chemistry (vitrimers). The resulting vitrimers display markedly different nanostructural, thermal and rheological properties relative to those of their statistical copolymer-derived counterparts. This study demonstrates that prepolymer sequence is a versatile strategy to modify the properties of vitrimers.</p>

Novel pH-Sensitive Poly(Vinyl Alcohol) Based Polyampholyte as Pervaporation Membrane

2016 ◽  
Vol 852 ◽  
pp. 979-983
Author(s):  
Ping Rui Meng ◽  
Liang Bo Li
Keyword(s):  
Aqueous Solution ◽  
Vinyl Alcohol ◽  
Water Resistance ◽  
Graft Copolymerization ◽  
Sodium Acrylate ◽  
Poly Vinyl Alcohol ◽  
Permeate Flux ◽  
Ft Ir ◽  
Ethanol Aqueous Solution ◽  
Poly Acrylamide

Sodium acrylate (NaAA) and acrylamide (AM) were grafted onto poly (vinyl alcohol) (PVA) using potassium persulfate as an initiator, Graft copolymerization namely poly (vinyl alcohol)-g-poly (acrylamide/sodium acrylate) (PVA-g-PAM/SAC). The poly (vinyl alcohol)-g-poly (vinylamine/sodium acrylate) (PVAMC) was prepraed by Hofmann rearrangement.The PVAMC homogeneous membrane was characterized by fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM).The water resistance of the PVAMC membranes is the best when pH of the PVAMC solutions was 4, at that time the numbers of-NH3+ and-COO- groups trended to be equal, so the isoelectric point was pH=4. At 90 °C the pervaporation of PVAMC composite membrane was tested and showed that the separation factor and the permeate flux were about 1001 and 1341 g/(m2·h) for 90wt% ethanol aqueous solution, and they were about 1297 and 1040 g/(m2·h) for 90wt% isopropanol aqueous solution.

Synthesis and aggregation behaviour of thermo-responsive-b-poly(ionic liquid) diblock copolymers in aqueous solution

2021 ◽  
pp. 116754
Author(s):  
Yongfang Yao ◽  
Chetan Patel ◽  
Rohit L. Vekariya ◽  
Shin-ichi Yusa ◽  
Chetan B. Sangani ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Ionic Liquid ◽  
Diblock Copolymers ◽  
Aggregation Behaviour ◽  
Poly Ionic Liquid

Amphiphilic Diblock Copolymers of Poly(glycidol) with Biodegradable Polyester/Polycarbonate. Organocatalytic One-Pot ROP and Self-Assembling Property

2021 ◽  
Author(s):  
Tingyu He ◽  
Atsushi Narumi ◽  
Yanqiu Wang ◽  
Liang Xu ◽  
Shin-ichiro Sato ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Diblock Copolymers ◽  
Amphiphilic Block Copolymers ◽  
Synthetic Method ◽  
Biodegradable Polyester ◽  
One Pot ◽  
Self Assembling ◽  
Amphiphilic Diblock Copolymers

A synthetic method for a series of poly(glycidol) (PG)-based amphiphilic block copolymers is presented with an emphasis on the catalyst switch method from an organic superbase (t-Bu-P4) to another with...

Self-crosslinking assemblies with tunable nanostructures from photoresponsive polypeptoid-based block copolymers

2020 ◽  
Vol 11 (2) ◽  
pp. 337-343 ◽  
Author(s):  
Jirui Wei ◽  
Jing Sun ◽  
Xu Yang ◽  
Sifan Ji ◽  
Yuhan Wei ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Diblock Copolymers ◽  
New Family

A series of reversible crosslinking assemblies with tunable morphologies are obtained from a new family of photoresponsive polypeptoid-based diblock copolymers.

Interaction of PEO-PS-PEO Block Copolymers with Ionic Surfactants in Aqueous Solution

1997 ◽  
Vol 34 (12) ◽  
pp. 2497-2507 ◽  
Author(s):  
Kiran Contractor ◽  
Chandrakant Patel ◽  
Pratap Bahadur
Keyword(s):  
Aqueous Solution ◽  
Block Copolymers ◽  
Ionic Surfactants

Effect of inorganic salts on the micellar behaviour of ethylene oxide-propylene oxide block copolymers in aqueous solution

1993 ◽  
Vol 271 (7) ◽  
pp. 657-667 ◽  
Author(s):  
P. Bahadur ◽  
K. Pandya ◽  
M. Almgren ◽  
P. Li ◽  
P. Stilbs
Keyword(s):  
Aqueous Solution ◽  
Block Copolymers ◽  
Ethylene Oxide ◽  
Propylene Oxide ◽  
Inorganic Salts
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