反气相色谱法研究增塑剂-探针分子的热力学性能

Study on thermodynamic performances between plasticizer and some probes by inverse gas chromatography

利用凝胶色谱(GPC)、热重分析(TGA)、表面张力仪和差示扫描量热(DSC)法等对增塑剂环烷油的分子结构及其基本性能进行了表征。以不同种类的溶剂作为探针分子,采用反气相色谱(IGC)法对增塑剂的热力学性能进行了研究。结果表明:在试验温度(50～80℃)范围内,正戊烷、正己烷、正庚烷、环己烷、氯仿、苯和乙醚是环烷油的良溶剂,甲醇和丙酮是环烷油的不良溶剂;IGC法测得随着温度的升高,环烷油的溶度参数从50℃的13.94(J/cm3)1/2逐渐降至80℃的13.21(J/cm3)1/2;利用相互作用参数与温度的关系,采用外推法可得到25℃时环烷油的溶度参数为14.38(J/cm3)1/2,这与14.50(J/cm3)1/2(根据表面张力-溶度参数关系式计算而得)基本一致。

The molecular structure and some basis performances of a plasticizer（namely naphthenic oil） were characterized by GPC,TGA,surface tension meter,DSC and other methods. With different solvents as probes, so the thermodynamic performances of plasticizer were investigated by inverse gas chromatography （IGC）. The results showed that these solvents（namely n-pentane, n-hexane, n-heptane, cyclohexane, chloroform, benzene and diethyl ether） are well solvents, but methanol and acetone are badness solvents for naphthenic oil when experimental temperature was between 50℃ and 80 ℃. The solubility parameter which was mensurated by IGC was decreased from 13.94 （J/cm3）1/2 at 50 ℃to 13.21 （J/cm3）1/2 at 80 ℃ when the experimental temperature was increased from 50 ℃ to 80 ℃. The 14.38 （J/cm3）1/2 obtained by extrapolation and relation formula between interaction parameter and temperature and 14.50 （J/cm3） 1/2 obtained by relation formula between surface tension and solubility parameter were nearly same for solubility parameter of naphthenic oil at 25℃.