Sorption of Benzene, Dichloromethane, and 2-Butanone by Poly(methyl methacrylate), Poly(butyl methacrylate), and Their Copolymers at 323.15 K Using a Quartz Crystal Balance

Abstract

Isothermal solubilities at 323.15 K of benzene, dichloromethane, and 2-butanone in poly­(methyl methacrylate), poly­(butyl methacrylate), and two different poly­(methyl methacrylate)-poly­(butyl methacrylate) copolymers are reported. Results were obtained for the concentrated polymer regime with a quartz crystal balance and are represented to within experimental error by a modified Flory–Huggins equation.

Sorption of Benzene, Dichloromethane, and n-Propyl Acetate by Poly(methyl methacrylate)/ Polystyrene Copolymers at 323.15 K Using a Quartz Crystal Balance

“…The molar volume of polystyrene at 323.15 K was calculated as described by Wong et al Specific volumes of the copolymers were assumed to be a weight fraction average of those of pure PMMA , and PS and were converted to molar volumes using the given molecular weights. Molar volumes of the solvents were calculated using the modified Rackett equation .…”

“…A complete description of the experimental apparatus and procedure was given earlier and comparisons of data obtained with the apparatus to existing literature data have been made. ,, The polymer under investigation is deposited onto the surface of a quartz crystal and then placed in a static sorption cell, where it is exposed to vapor of the desired solvent. A shift Δ f 0 in frequency of the crystal occurs when the polymer film is deposited and an additional shift Δ f occurs when solvent vapor is sorbed by the polymer.…”

“…In this last of a series of papers − reporting the use of a static method to measure solvent activities in solvent + polymer binary systems, we present new sorption data for n -propyl acetate and dichloromethane in a polystyrene (PS) homopolymer and for benzene, dichloromethane, and n -propyl acetate in two poly­(methyl methacrylate)/polystyrene (PMMA/PS) copolymers. Results were obtained at 323.15 K for low solvent weight fractions using the same quartz crystal balance employed earlier. − When combined with results presented earlier for benzene + polystyrene and for benzene, dichloromethane, and n -propyl acetate + poly­(methyl methacrylate), a set of data for all three solvents in both homopolymers and two copolymers of different composition are available.…”

Sorption of Benzene, Toluene, and Ethylbenzene by Poly(ethyl methacrylate) and Plasticized Poly(ethyl methacrylate) at 298.15 K Using a Quartz Crystal Microbalance

“…As part of a continuing study of the solubility of organic compounds in polymers and copolymers, − we present here sorption data for benzene, toluene, and ethylbenzene (BTEX compounds, together with xylene) in poly­(ethyl methacrylate) (PEMA) and plasticized PEMA. Experimental results were obtained at 298.15 K using a quartz crystal microbalance/flow apparatus that has been applied in earlier studies. , The focus of the present work is to study the effect of solvent sorption by adding a plasticizer to the polymer deposited on the quartz crystal.…”

Sorption of Benzene, Dichloroethane, Dichloromethane, and Chloroform by Poly(ethylene glycol), Polycaprolactone, and Their Copolymers at 298.15 K Using a Quartz Crystal Microbalance

“…There are several methods of organic vapor sensing; among them, the quartz crystal microbalance (QCM) technique, first introduced by King, offers high sensitivity, thus allowing for the use of thinner polymer films, which results in shorter equilibration times. Previously reported results from our laboratory were obtained using a QCM in a static apparatus. − Here we report data obtained using a QCM in a newly designed flow system. In particular, we present solubilities of benzene, 1,2-dichloroethane, chloroform, and dichloromethane in the homopolymers polycaprolactone (PCL) and poly­(ethylene glycol) (PEG) as well as three PEG/PCL diblock copolymers at 298.15 K. The copolymers are PEG(5000)/PCL(1000), PEG(5000)/PCL(5000), and PEG(1000)/PCL(5000), where each number in parentheses represents the molecular weight of that segment of the polymer.…”