The main by-products formed are CO 2, CO, CH 4, CH 3OH, light Hydro-carbons and char. AFM images of the PMMA/PUA blended films with different total concentrations. MeTHF is between THF and Ethylether in Lewis Base strength and polarity Property MeTHF THF Et 2O dielectric const 6.97 7.5 4.42 dipole moment, Debye 1.38 1.69 1.11 water solubility, g/100g 4 mis 1.2 Hildebrand, MPa ½ 16.9 18.7 15.5 solvation energy, kcal/mol 0.6 0 2.3 Donor Number 18 20.5 19.2 Selective dissolution of PMMA in the phase-separated films was feasible using tetrahydrofuran (THF) solvent after the UV curing process, because the cured PUA material is highly stable against THF. The molecular weight was determined using the ... good solubility parameter for PMMA - 17.2 (J1/2 cm-3/2), which provides a difference greater than 1.5. Note that the substrate exposure induced from the selective dissolution without additional etching process can be applied to further applications, such as antireflection layers. Solubility of polymethyl methacrylate in 12 organic solvents at 30–70°C was studied. The surface morphology of each sample was analyzed by atomic force microscopy (Digital Instrument Dimension 3100) in the tapping mode, and the film thicknesses were measured using reflectometer (Nanospec, K-MAC). Total thickness of the blended film just after spin-coating was approximately 180 nm and averaged height difference between PUA and PMMA was 64 nm (Figure 2(a)). I am trying to dissolve PAA of 1250 kDa (2 wt%). author = "M. Selvakumar and Bhat, {D. Krishna} and Renganathan, {N. G.}". The authors declare that there is no conflict of interests regarding the publication of this paper. Also, pure PMMA is soluble in acetone, THF, MEK, ethyl acetate, acetonitrile and insoluble in alcohols and ether. Dive into the research topics of 'Miscibility of polymethylmethacrylate and polyethyleneglycol blends in tetrahydrofuran'. Yue Zhang, Wei Li, Wenwen Zhou, Haoran Jia, Baotong Li. In addition, morphology of the PMMA/PUA blends can be easily controlled by changing composition (i.e., total concentration and weight ratio) of the blends. After the THF treatments, the heights of the cured PUA were found to be ~61 nm (for 10 wt%), ~119 nm (for 15 wt%), and ~170 nm (for 20 wt%), respectively (Figures 3(d)–3(f)). Instant access to the full article PDF. Contact angles and surface tension data were measured to obtain the surface tension components of polyacrylamide (PAM). Phase separation in spin-coated films is normally explained by various mechanisms, such as polymer-surface interactions, surface energy differences between polymers, and fast solvent evaporation of one component in polymer blends [20, 21]. Under this link you find the solubility of PMMA in 12 different organic solvents. A miscibility gap occurs when the substances being mixed exist at more than one phase and as a result experience a gap in miscibility. Cyanoacrylate and acrylic [PMMA, MMA, etc] based polymers can get good bonding at the molecular level. O * * n O O H H O Transmittance [%] 3 shows the phase diagram for the ternary system PMMA/THF/H 2 O at 25°C, with very large immiscibility gaps, meaning that the area of homogeneity was very small. were also prepared by mixing 12 wt% of PMMA and PUA for further evaluation of the mixing effects. The densities of the polymer solutions in THF … 1 Recommendation. @article{ee4718f3e9094d13a3e4b41dc08c1b6a. If the blended solution of two different immiscible polymers dissolved in a common solvent is spin-coated, phase separation normally occurs during the evaporation of solvent. These results strongly suggest great potential for various applications in the field of soft lithography, such as antireflection layers, polymer membranes, artificial superhydrophobic surfaces, and nanopatterned structures. The polymer-blended solutions were then individually spin-coated at 3000 rpm for 30 s onto the prepared Si substrates. The results indicated the existence of positive interactions in the blend polymer solutions and that they are miscible in THF in the entire composition range. Spin-coating is a simple method for fabricating thin polymer films, which facilitates precise and easy control of film thickness by rotational velocity and concentration of polymer solution [8, 9]. Here we present a binary immiscible polymer-blended system with high stability which enables complete selective dissolution of one component. It is concluded that the product PMMA particles, derived from the PMMA-acetone dilute solution, have a smaller particle size than those from the PMMA-THF dilute solution. Miscibility of polymethylmethacrylate and polyethyleneglycol blends in tetrahydrofuran. (THF) has been investigated by viscosity, density, refractive index, and ultrasonic velocity studies. 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