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Synthesis And Study Of The Micellization Behavior Of A Dual Temperature- And Ph-Responsive Paa-B-Pnipam Block Copolymer, Ehsan Zarshenas Moghadam
Synthesis And Study Of The Micellization Behavior Of A Dual Temperature- And Ph-Responsive Paa-B-Pnipam Block Copolymer, Ehsan Zarshenas Moghadam
Master's Theses and Doctoral Dissertations
Amphiphilic diblock copolymers are composed of hydrophilic and hydrophobic regions. When they are exposed to water, the hydrophobic blocks aggregate to form a hydrophobic core surrounded by hydrophilic regions outside to give a core-shell micelle. These micelles have many potential applications, such as a drug delivery system, surfactants, or nanoreactor. Many studies have been done to optimize the performance of these copolymers. In this thesis work, nine dual temperature- and pH-responsive poly(acrylic acid-block-N-isopropylacrylamide) (PAA-b-PNIPAM) diblock copolymers with different relative chain lengths of the hydrophobic and hydrophilic blocks were synthesized by reversible addition fragmentation chain transfer polymerization. The preliminary results showed …
Polymerized Ionic Liquids By Condensation Polymerization: Stimuli Responsive Polyurethane Gels And Dispersions, Harshit Gupta
Polymerized Ionic Liquids By Condensation Polymerization: Stimuli Responsive Polyurethane Gels And Dispersions, Harshit Gupta
Master's Theses and Doctoral Dissertations
Ionic liquids have been used in free radical polymerizations to make polymerized ionic liquid (PIL) materials of various types. PIL gels based on imidazolium cations have been found to exhibit an anion-exchange induced stimuli responsiveness. This thesis explores incorporation of ionic liquids in polyurethane (PU) polymers to make PIL PU gels and dispersions through condensation polymerization. PIL gels are synthesized through a single-pot approach that show stimuli response to solvents. This approach allows one to make these gels rapidly and cheaply on-site. These gels can reversibly porate in different solvents and are found to be porous when analyzed by scanning …