Sorption and dilation in poly(ethyl methacrylate)–carbon dioxide system

Journal of Polymer Science, Part B: Polymer Physics - Tập 27 Số 4 - Trang 879-892 - 1989
Yoshinori Kamiya1, Keishin Mizoguchi1, Takuji Hirose1, Yasutoshi Naito1
1Industrial Products Research Institute, 1‐1‐4 Higashi Tsukuba, Ibaraki 305, Japan

Tóm tắt

AbstractSorption and dilation in the system poly(ethyl methacrylate) (PEMA) and carbon dioxide are reported for pressures up to 50 atm over the temperature range 15–85°C. The sorption isotherms were obtained gravimetrically. The dilation accompanying sorption was measured directly with a cathetometer. At low temperatures the sorption and dilation isotherms were concave toward the pressure axis in the low‐pressure region and turned to convex with increasing pressure. As the experimental temperature approached and exceeded the glass transition temperature of 61°C, both isotherms became convex or linear over the whole range of pressure. Partial molar volumes of CO2 in PEMA were obtained from sorption and dilation data, which were described well by the extended dual‐mode sorption and dilation models developed recently. The temperature dependence of the dual‐mode parameters and the isothermal glass transition are discussed.

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Journal of Polymer Science, Part B: Polymer Physics

Tập 27 Số 4

879-892

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