Sorption of n-Hexane in Amorphous Polystyrene

作者：Kadam Ashish; Karbowiak Thomas; Voilley Andree; Bellat Jean Pierre; Vitrac Olivier; Debeaufort Frederic^*

来源：Journal of Polymer Science Part B: Polymer Physics , 2014, 52(19): 1252-1258.

DOI：10.1002/polb.23557

• amorphous
• Glassy Polystyrene
• sorption hysteresis
• structure
• swelling

Sorption properties of pure n-hexane vapor in amorphous polystyrene (PS) were studied at 298 K by thermogravimetry under controlled vapor pressure. Two sorption-desorption cycles were performed by varying the relative pressure between 0 and 0.91. Mixing of PS with n-hexane resulted in a strong plasticization, which was evidenced by quite significant depression in the glass transition temperature of the polymer as shown by differential scanning calorimetry. Maximum quantity of n-hexane sorbed in the PS at 298 K and at a pressure close to saturation was about 12.4 wt %. The thermogravimetry yielded an isotherm with a strong hysteresis loop, explanation of which was hypothesized with the help of (a) Flory-Huggins sorption model extended by Vrentas, (b) analysis

• 出版日期2014-10-1