反气相色谱法（IGC）应用于聚合物和颜料的表面表征 IGC, Surface Properties, and Interactions Among Components of Paint Formulations

Inverse gas chromatography (IGC) was applied to the surface characterization of polymers and
pigments used in the formulation of protective coatings. IGC measurements over a significant
temperature range provided surface energy and acid-base interaction parameters for these materials.
Two sets of IGC data were obtained:

 (1) the quantity of vapor used to probe solid surfaces was extremely small, with results describing the properties of the most energetic surface sites; and

 (2) finite concentrations of vapor probes were used, with results describing the average properties of surface sites. A comparison of the two sets gave information on the heterogeneity of sites on the polymer and pigment surfaces. Heterogeneity parameters were defined for sites interacting through dispersion forces as well as for those able to interact as acids and bases. The present work reinforces the usefulness of surface characterizations by IGC by showing that the stability of pigments dispersed in the polymer vehicles was a function of the acid-base interaction between polymer-pigment pairs.

CONCLUSIONS
IGC analysis at very high dilution and at finite concentration of probe injection has been carried out on a series of polymers and pigments used in paint formulations. Values of dispersion surface energies, and of acid-base interaction parameters have been obtained for the materials, and pair interaction parameters calculated from the results.
IGC data at very dilute probe concentration have characterized the surface energies and acid-base interaction potentials of the high energy sites in the material surfaces. At high concentration of injected probes, the corresponding average properties of surface sites have been evaluated. The ratio of the two sets of values has been used to estimate the site energy distribution in the polymers and pigments.
The dispersion stability of each pigment/polymer combination has been measured and correlated with the acid-base interaction parameters of the materials. The correlation is strong, justifying the availability of fundamental thermodynamic interaction data to optimize performance aspects of protective coatings.
The data in hand are sufficient to define only a portion of a more complex relationship between dispersion stability and acid-base forces at polymer/pigment interfaces.
A broader study is called for to define the relationshipin greater detail

对涂料配方中使用的一系列聚合物和颜料进行了IGC-ID 和 IGC-FC 分析。获得了材料的表面能和酸碱相互作用参数的值，并根据结果计算出了对相互作用参数。

无限稀释下的IGC数据表征了材料表面高能位点的表面能和酸碱相互作用。有限浓度下，已评估了相应的表面平均能量点。两组值的比值已用于估算聚合物和颜料中的位置能量分布。

通过测量每种颜料/聚合物组合的分散稳定性，并与材料的酸碱相互作用参数相关。这种相关性很强，证明了基本热力学相互作用数据的可用于优化保护涂层的性能。