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

Abstract

Isothermal solubilities of benzene, dichloromethane, n-propyl acetate, and 2-butanone in poly(methyl methacrylate) (PMMA), poly(ethyl methacrylate) (PEMA), and two different PMMA/PEMA copolymers at 323.15 K are reported. Data were measured in the concentrated-polymer regime using a quartz crystal balance and are represented by a modified FloryÀHuggins equation to within experimental error. The model parameters show a trend with copolymer composition.

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

“…As argued in our previous study, 3 viscoelastic effects are expected to be negligible for the data reported here.…”

“…As noted in an earlier paper 3 reporting the solubilities of these solvents in PMMA/PEMA copolymers, hysteresis, in which the sorption/desorption curves do not superimpose, was found to be an issue. Specifically, t tests comparing sorption and desorption runs indicated that hysteresis was evident for systems with homopolymer PMMA at solvent weight fractions below approximately 0.1.…”

“…The data were obtained in the concentrated polymer regime, measured with the same quartz crystal balance used in previous studies. 1−3 Results for these solvents with poly(methyl methacrylate) were reported previously 3 and are included here for completeness.…”

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.…”

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

“…Solubility data of organic compounds in polymers and co-polymers from the quartz crystal microbalance (QCM) have produced interesting thermodynamic results and interpretation. − In this study, we present solubilities of benzene, toluene, and ethylbenzene (BTEX compounds, along with xylenes) in plasticized poly­(ethyl methacrylate) (PEMA) and polystyrene (PS) at 298.15 K using a QCM equipped with a new vapor generation system to target low concentrations. As part of the continuing study on the effect of added plasticizers on solvent sorption, three plasticizers, diisononyl cyclohexane-1,2-dicarboxylate (DINCH), diisooctyl azelate (DIOA), and n -butyl stearate (BS), have been added to the homopolymers of PEMA and PS.…”