Sorption of Benzene, 1,2-Dichloroethane, Dichloromethane, and Chloroform by Polyethylene Glycol, Polycaprolactone, and their Triblock Copolymers at 298.15 K Using a Quartz Crystal Microbalance

Abstract

Using a quartz crystal microbalance, the sorption of several different solvents, benzene, 1,2-dichloroethane, dichloromethane, and chloroform in three triblocks of the homopolymers polycaprolactone (PCL) and polyethylene glycol (PEG) were observed at 298.15 K. The solvent−polymer interaction was modeled using a modified Flory− Huggins equation and weight-based activity coefficients at infinite dilution were obtained from it to study the trend as the PCL/PEG ratio increases in the triblock copolymer system.

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

“…Since experimental runs were made along a fixed ratio of φ 3 /φ 2 , we have elected to treat the runs made here as a series of pseudobinary runs, where the components are a volatile solvent (1) and a polymer–plasticizer pseudocomponent ( f ). In fact, for a constant ratio of φ 3 /φ 2 , it can be shown (with suitable choices for the molar volume and interaction parameters of the polymer–plasticizer pseudocomponent) that the activity of the solvent (1) can be written in the same form as the Flory–Huggins equation for a binary system where and where α = φ 3 /φ 2 and the subscript f refers to the polymer–plasticizer pseudocomponent.…”

“…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.…”

“…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. Here, we apply two different plasticizers (diisononyl cyclohexane-1,2-dicarboxylate [DINCH] and diisooctyl azelate [DIOA]) at three different concentrations and report the solvent activity as a function of solvent weight fraction in the polymer–plasticizer film for each case.…”

Sorption of Benzene, 2-Butanone, and Chloroform by Polybutadiene and its Copolymers with Polystyrene at 298.15 K Using a Quartz-Crystal Microbalance

“…The values of A and B and the resulting average deviations in the mass fraction are given for each solvent–polymer system in Table . The two-parameter Flory–Huggins model was used to calculate the infinite dilution activity coefficient, as described in previous work, using the following equation where Ω ∞ is the infinite dilution activity coefficient (also reported in Table ), B is the parameter obtained from Flory–Huggins modeling, r is the ratio of molar volumes of the polymer and the solvent, and M 1 and M 2 are the molecular weights of the solvent and the polymer, respectively. For all compositions, the values for Ω ∞ are greatest for 2-butanone followed by benzene and then chloroform, as shown in Table .…”

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.…”