反气相色谱法与Hansen溶解度参数法测定聚乙烯醇溶解度参数及相关热力学性质

采用反气相色谱（IGC）法，以聚乙烯醇（PVA）为固定相，脂肪族、芳香族、醇、酮及卤代烃5类18种化合物为探针分子，研究PVA的溶解性质并获得了PVA在383.15～423.15 K范围内的溶解度参数（δ₂）及相关热力学性质，并与Hansen溶解度参数法（HSP）测得的溶解度参数（δ_T）进行比较。结果表明，5类溶剂对PVA溶解能力的趋势为酮类 >醇类 >卤代烃、芳香类、脂肪族类>脂环族，卤代烃、芳香类和脂肪族类溶剂的溶解能力相似；在测试温度范围内PVA的δ₂随温度升高而增加；采用IGC法外推出室温（298.15 K）下PVA的δ₂为27.69 （J/cm³）^0.5，与HSP法测得室温下PVA的δ_T（27.77 （J/cm³）^0.5）一致。PVA溶解度参数及相关热力学参数的研究为其应用及相关研究提供了定量依据。

Determination of solubility parameters and the related thermodynamic properties of polyvinyl alcohol using inverse gas chromatography and Hansen solubility parameters

An inverse gas chromatography (IGC) method was used to study the solubility parameters (δ₂) and the related thermodynamic properties of polyvinyl alcohol (PVA) that was used for the stationary phase. Totally 5 classes of 18 organic solvent molecules (aliphatic, aromatic hydrocarbons, alcohols, ketones and halohydrocarbons) were used for the probe molecules at 383.15-423.15 K. And the δ₂ was compared with the solubility parameter (δ_T) that was measured by the Hansen solubility parameter (HSP) method. The results showed that the solving ability of PVA decreased in the 5 classes of solvents in the following sequence: ketones > alcohols > halohydrocarbons, aromatic hydrocarbons, aliphatics >alicyclics, and the halohydrocarbons, aromatic hydrocarbons, aliphatics had similar solving abilities. The δ₂ increased with the increase of temperature at 383.15-423.15 K. The δ₂ of PVA that was derived as 27.69 (J/cm³)^0.5 by analytical extrapolation method at room temperature (298.15 K) was consistent with the δ_T of PVA that was measured as 27.77 (J/cm³)^0.5 by the HSP method at room temperature. The determination of solubility parameters and the related thermodynamic parameters can be used as a reference to the application and research of PVA.