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Evaluation of solubility parameters for nonvolatile branched hydrocarbons by inverse gas chromatography

机译:反相气相色谱法评估非挥发性支链烃的溶解度参数

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Flory-Huggins interaction parameters determined by inverse gas chromatographic (IGC) technique have been used for the estimation of solubility parameters of nonvolatile branched hydrocarbon solvents. A family of isosteric branched hydrocarbons consists of one apolar stationary phase, 19,24-dioctadecyldotetracontane (C78), and four polar stationary solvents formed by replacing one of the -CH3 groups of C78 by -OH (POH), -CN (PCN), -SH (PSH), -CF3 (MTF), and two other polar solvents formed by replacing four -CH3 groups of C78 with four -CF3 (TTF) and -OCH3 (TMO) are investigated. The three-dimensional Hansen solubility parameters of the solvents have been estimated following the approaches of Voelkel and the method of Huang at five different temperatures. In the three components estimated by Voelkel method, the dispersion component is decreasing rapidly, whereas the polar, and hydrogen bonding components of the solubility parameters are increasing with temperature. In the components of solubility parameter estimated by Huang method, the dispersion and hydrogen bonding components are slowly decreasing with temperature, however, the polar components are almost constant with temperature. The components of solubility parameters for different solvents have been discussed in terms of solvent polarity. (c) 2008 Wiley Periodicals, Inc.
机译:通过逆气相色谱(IGC)技术确定的Flory-Huggins相互作用参数已用于估算非挥发性支链烃溶剂的溶解度参数。等规支链烃家族由一个非极性固定相,19,24-二十八烷基十二四碳六烯(C78)和四种极性固定溶剂组成,这些极性固定溶剂通过用-OH(POH),-CN(PCN)取代C78的-CH3基团之一而形成,-SH(PSH),-CF3(MTF)以及通过将四个C78的四个-CH3基团替换为四个-CF3(TTF)和-OCH3(TMO)而形成的另外两种极性溶剂。按照Voelkel的方法和Huang的方法在五个不同的温度下估算了溶剂的三维Hansen溶解度参数。在通过Voelkel方法估计的三个成分中,分散度成分迅速降低,而溶解度参数的极性和氢键成分随温度增加。用黄方法估计的溶解度参数的成分中,分散度和氢键成分随温度缓慢降低,而极性成分随温度几乎恒定。已根据溶剂极性讨论了不同溶剂的溶解度参数的组成。 (c)2008 Wiley期刊公司

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