Hydrophobically controlled self‐association of pH‐ and thermo‐sensitive triblock copolymers based on poly(acrylic acid‐co‐tert‐butyl acrylate) and poly(propylene oxide) |
| |
| Authors: | Christophe Pottier Gaëlle Morandi Christophe Rihouey Virginie Dulong Luc Picton Didier Le Cerf |
| |
| Affiliation: | 1. Normandie Université, France;2. Université de Rouen, Laboratoire Polymères Biopolymères Surfaces, Mont Saint Aignan, France;3. CNRS UMR 6270 & FR 3038, Mont Saint Aignan, France;4. INSA De Rouen, Laboratoire Polymères Biopolymères Surfaces, Saint‐étienne‐du‐Rouvray, France |
| |
| Abstract: | Aqueous solution properties of amphiphilic P(AA‐co‐tBA)‐b‐PPO‐b‐ P(AA‐co‐tBA) copolymers having various tBA contents are presented in this article. These copolymers show pH‐sensitive behavior depending on tBA/AA ratio. Hydrophobic interactions between tBA units leading to pH‐dependent macroscopic aggregates were evidenced by turbidimetry. The aggregation behavior of the PPO middle block was concealed in presence of tBA units. The formation of water‐soluble aggregated objects was characterized by Asymmetrical Flow Field Flow Fractionation (AsF4). By increasing tBA/AA ratio, we observed an increase of aggregates size as well as a reduction of the critical concentration aggregation. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016 , 54, 1944–1949 |
| |
| Keywords: | amphiphiles poly(acrylic acid) poly(propylene oxide) poly(tert‐butylacrylate) self‐association sef‐organization stimuli‐sensitive polymers triblock copolymers |
|
|
