Abstract
FTIR spectroscopy was used to investigate the alterations of the vibration bands in the mid-infrared region of Polyethylene oxide in aqueous solution at 25 mg/mL concentration under exposure up to 4 h to a static magnetic field at 200 mT. FTIR spectroscopic analysis of PEO solution in the range 3500–1000 cm−1 evidenced the stretching vibrations of ether band, C–H symmetric-antisymmetric and bending vibrations of methylene groups, and the C–O–C stretching band. A significant decrease in intensity of symmetric and asymmetric stretching CH2 vibration bands occurred after 2 h and 4 h of exposure, followed by a significant decrease in intensity of scissoring bending in plane CH2 vibration around 1465 cm−1. Finally, the C–O–C stretching band around 1080 cm−1 increased in intensity after 4 h of exposure. This result can be attributed to the increase of formation of the intermolecular hydrogen bonding that occurred in PEO aqueous solution after SMF exposure, due to the reorientation of PEO chain after exposure to SMF. In this scenario, the observed decrease in intensity of CH2 vibration bands can be understood as well considering that the reorientation of PEO chain under the applied SMF induces PEO demicellization.
Highlights
Polymers are substances whose molecules have high molar masses, formed by repeated linking of small molecules called “monomers”.Some natural polymers are proteins, starches, cellulose, and latex
Fourier Transform Infrared (FTIR) spectra acquired after 2 h and 4 h of exposure showed significant changes of vibration bands in comparison to control, as described below
Exposure to a static magnetic field (SMF) at 200 mT of samples of polyethylene oxide (PEO) in aqueous solution induced its demicellization as evidenced by FTIR spectroscopy analysis
Summary
Polymers are substances whose molecules have high molar masses, formed by repeated linking of small molecules called “monomers”.Some natural polymers are proteins, starches, cellulose, and latex. Polymers are substances whose molecules have high molar masses, formed by repeated linking of small molecules called “monomers”. Water-soluble polymers may be used in industrial and consumer products such as polymeric surfactant, pigment dispersants, or detergents, due to their properties of assembly in spherical micelles and vesicles that may be used as drug delivery vehicles. Several polymers can aggregate in micelles and can be considered good candidates for drug delivery purposes [1,2,3,4]. An important property of polymers is crystallization. The long chains of repeating monomers of a polymer form stacks of parallel chains called lamellae, that fold back on itself, as explained by [5, 6]. The polymers tend to be stronger and more rigid, this can lead to brittleness [7, 8]
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