Abstract
mPEG (monomethoxy poly(ethylene glycol))-maleic rosin copolymer was successfully prepared. The surface properties of the copolymer were investigated by surface tension and resonance scattering techniques. The critical micelle concentration (CMC) was obtained. The adsorption behaviors and the conformational changes of the surfactant molecules at the air-water interface were described. The adsorption amount of state 1 presented a sinusoid shape and that of state 2 presented a sigmoid with the growth of П. The free energy of adsorption is more negative than that of micellization, thus, the surfactant molecules adsorb on the surface firstly, and then form micelles after saturation adsorption. Accordingly, structural transformation and aggregation behaviors of various concentration mPEG-maleic rosin copolymers with changing temperature were explored in water. The mPEG-maleic rosin chains experienced transformation from unimers to aggregates, to contracted aggregates, to cohesive aggregates with increasing temperature when the concentration is lower than CMC. This process is almost reversible with decreasing temperature. Transformation from micelle to aggregate with increasing temperature happened when the concentration is higher than CMC. The phenomena were assessed by DLS (dynamic light scattering) and SEM (scanning electron microscopy) techniques.
Highlights
Water-soluble polymers have attracted a great deal of attention over the years for industrial applications, such as dispersants, stabilizers, emulsifiers, and flocculants [1,2]
Poly(ethylene glycol) (PEG) is a compound which has often been utilized as a conjugated segment to other hydrophobic polymer in copolymer synthesis, and its high hydration capacity is favorable for regulation of the hydrophilicity of the materials
Increase, reaching a maximum at about range of 67–25 °C. These results demonstrate that the Rh obtained by the Dynamic light scattering (DLS) method is almost
Summary
Water-soluble polymers have attracted a great deal of attention over the years for industrial applications, such as dispersants, stabilizers, emulsifiers, and flocculants [1,2]. The representative synthetic examples include poly(ethylene glycol), poly(vinyl alcohol), poly(meth)acrylate, poly(meth)acrylamide, and poly(vinyl ether). Poly(ethylene glycol) (PEG) is a cheap, neutral, water-soluble, biocompatible, FDA-approved polymer and, poly(ethylene glycol) and its derivatives show potential applications in biotechnology and medicine delivery due to their solubility, nontoxicity, low fouling, and biocompatibility. PEG is a compound which has often been utilized as a conjugated segment to other hydrophobic polymer in copolymer synthesis, and its high hydration capacity is favorable for regulation of the hydrophilicity of the materials. PEG-based thermoresponsive polymers, such as copolymer based on poly(vinyl ether), poly(norbornene), polyester, polystyrene, poly(acrylate), or poly(meth)acrylate have been proposed as interesting alternatives to Poly(N-isopropylacrylamide)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
