【摘要】 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(δT)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δT(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。更多还原

【Abstract】 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 δ2was compared with the solubility parameter(δT)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 δ2increased with the increase of temperature at 383. 15- 423. 15 K. The δ2of PVA that was derived as 27. 69(J/ cm3)0. 5by analytical extrapolation method at room temperature(298. 15 K)was consistent with the δTof PVA that was measured as 27. 77(J / cm3)0. 5by 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.更多还原