Solution Properties of Poly(Methyl Methacrylate) in Dimethylsulfoxide

Abstract

The solution properties of polymethylmethacrylate in dimethylsulfoxide were studied using multi-angle light scattering and an online viscometer coupled to size exclusion chromatography. The data demonstrate that DMSO is a suitable eluent for the determination of the molecular weight of PMMA by SEC. The Mark-Houwink coefficients K and a were determined as a function of temperature. At 35 C, DMSO is a theta solvent for PMMA, and it becomes a good solvent as the temperature increases. The unperturbed dimension K h was calculated using three different procedures. The data do not show evidence of a conformational transition controlled by the temperature such as the one reported in benzene and confirm the existence of a general relationship between the ratio K=K h and a. In the case of PMMA, the comparison of the dipole moment of the side group to that of the solvent can be used to predict the existence of a conformational transition.

Resistive Switching in Nonperovskite-Phase CsPbI3 Film-Based Memory Devices

“…Although DMSO is reported to be a theta solvent for PMMA at 35 °C and a good solvent as the temperature increases, in our experiments, some insoluble PMMA was found when more than a certain amount of PMMA was added into the DSMO solutions containing equimolar CsI and PbI 2 . Fourier-transform infrared spectroscopy (FTIR) was used to quantitatively characterize the dissolved quantities of PMMA in the precursor solutions (see the Supporting Information).…”

Front-Contact Passivation of PIN MAPbI3 Solar Cells with Superior Device Performances

“…It reveals a change in the nature of the top surface from hydrophobic to hydrophilic, which is helpful with the complete cover of perovskite precursor and promoted contact between MAPbI 3 and the underneath PMMA layer. Solvents such as DMF and DMSO can dissolve the PMMA polymer via stirring or heating, so it is possible that the PMMA may be affected by the perovskite solution. , However, the very short contact time during the spin-coating process can minimize the impact on the PMMA structure. We assume that the thin PMMA film remains intact.…”

High Efficiency Vibrational Technology (HEVT) for Cell Encapsulation in Polymeric Microcapsules

“…Then, 5 mL of DMSO was added to the control and not encapsulated cells, and 10 mL was added to PMMA encapsulated cells in order to also solubilize microcapsules. Owing to PMMA solubility in DMSO, blank PMMA microcapsules were used as negative control and underwent the same incubation and MTT treatment [36]. Absorbance values of colored solutions were quantified at 570-690 nm wavelength by UV spectrophotometer analysis (UV-1601, Shimadzu Corporation, Nakagyo-ku, Kyoto 604-8511, Japan).…”