Phase Behavior and Micellar Properties of Carboxylic Acid End Group Modified Pluronic Surfactants

Langmuir ◽  
2007 ◽  
Vol 23 (26) ◽  
pp. 12857-12863 ◽  
Author(s):  
Johan P. A. Custers ◽  
Leo J. P. van den Broeke ◽  
Jos T. F. Keurentjes
Keyword(s):  
Carboxylic Acid ◽  
Phase Behavior ◽  
Micellar Properties ◽  
End Group

Vaporization of protic ionic liquids derived from organic superbases and short carboxylic acids

2017 ◽  
Vol 19 (25) ◽  
pp. 16693-16701 ◽  
Author(s):  
Filipe M. S. Ribeiro ◽  
Carlos F. R. A. C. Lima ◽  
Inês C. M. Vaz ◽  
Ana S. M. C. Rodrigues ◽  
Erlin Sapei ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Carboxylic Acid ◽  
Phase Behavior ◽  
Carboxylic Acids ◽  
Cohesive Energy ◽  
Protic Ionic Liquids

Evaluation of the phase behavior and cohesive energy of DBN/DBU and carboxylic acid based protic ionic liquids (PILs).

Synthesis and Micellar Properties of Star-Shaped Poly(ε-Caprolactone)-Dextran Amphiphilic Block Copolymer

2011 ◽  
Vol 239-242 ◽  
pp. 2711-2716
Author(s):  
Xue Qing Liu ◽  
Ji Yan Liu
Keyword(s):  
Ring Opening ◽  
Ph Value ◽  
Star Polymer ◽  
Element Analysis ◽  
H Nmr ◽  
Micellar Properties ◽  
The Core ◽  
Micelle Size ◽  
Form Star ◽  
End Group

6-arm star-shaped Poly (ε-caprolactone)-dextran (sPCL-dextran) was synthesized and characterized. The core of the star polymer is dipentaerythritol, the inner block in the arm is hydrophobic poly (ε-caprolactone) (PCL), and the outer block in the arm is hydrophilic dextran. The synthesis involves three steps: (1) The ring-opening polymerization of ε-caprolactone (CL) initiated by dipentaerythritol produces 6-arm star-shaped PCL (sPCL-OH). (2) The sPCL-OH reacts with acryloyl chloride to get star-shaped PCL with acrylate end group (sPCL-CH=CH2). (3) The amino ended dextran (dextran-NH2) is then attached to sPCL-CH=CH2 terminus by Micheal addition to form star-shaped sPCL-dextran. The architecture of products was characterized with 1H NMR, GPC and element analysis. Micellization of sPCL-dextran in aqueous solutions was investigated by DLS. The results showed that the micelle size (Rh) and size distribution are related to the concentration of the sPCL-dextran. Salt, pH value and temperature have no obvious influence on the Rh.

Hydrolytic degradation of poly(d,l-lactide) as a function of end group: Carboxylic acid vs. hydroxyl

Polymer ◽  
2006 ◽  
Vol 47 (6) ◽  
pp. 1960-1969 ◽  
Author(s):  
Jeffrey S. Wiggins ◽  
Mohammad K. Hassan ◽  
Kenneth A. Mauritz ◽  
Robson F. Storey
Keyword(s):  
Carboxylic Acid ◽  
Hydrolytic Degradation ◽  
End Group

End Group Effects on the Phase Behavior of Polymer Blends:  Poly(dimethylsiloxane) and Poly(methylphenylsiloxane) Blend

1996 ◽  
Vol 29 (4) ◽  
pp. 1260-1265 ◽  
Author(s):  
Caibao Qian ◽  
Stelian Grigoras ◽  
Linda D. Kennan
Keyword(s):  
Polymer Blends ◽  
Phase Behavior ◽  
End Group ◽  
Group Effects

scholarly journals Influence of cyclodextrin on the solubility of a classically prepared 2-vinylcyclopropane macromonomer in aqueous solution

2012 ◽  
Vol 8 ◽  
pp. 1528-1535 ◽  
Author(s):  
Helmut Ritter ◽  
Jia Cheng ◽  
Monir Tabatabai
Keyword(s):  
Aqueous Solution ◽  
Carboxylic Acid ◽  
Graft Copolymer ◽  
Ring Opening ◽  
Main Chain ◽  
Double Bonds ◽  
Radical Ring ◽  
Unsaturated Polymer ◽  
End Group ◽  
Clouding Point

A macromonomer 5 consisting of a polymerizable vinylcyclopropane end group and a poly(N-isopropylacrylamide) (poly(NiPAAm)) chain was obtained from amidation of 1-ethoxycarbonyl-2-vinylcyclopropane-1-carboxylic acid (4) with an amino-terminated poly(NiPAAm) 3 as an example. This macromonomer 5 showed an LCST effect after complexation of the vinyl end group with ß-cyclodextrin in water. Via radical ring-opening copolymerization of 5 and NiPAAm a graft copolymer 8 with a clouding point of 32 °C was synthesized. The branched unsaturated polymer was treated with ozone to cleave the double bonds of the main chain.

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