Wagner O
Department of Inorganic Chemistry, Technical University of Budapest, Hungary.
Drug Dev Ind Pharm. 1998 Mar;24(3):243-52. doi: 10.3109/03639049809085616.
The polarities of four elastomers made of silicon oligomers of different viscosities were investigated by measuring the uptake of swelled solvent in different polarity solvents after 24, 48, and 72 hr of treatment. The solvent uptake provides a good characterization for the polarity of the inside of the matrix. On the basis of the results the oligomers were divided into two groups. The same method has been used for the investigation of the change of the inner polarity of samples containing various amounts of polar and apolar liquid ingredients. It was shown that the polarity of the inside of the matrix is related to the swelling properties. The ingredients used changed the matrix framework, which was also influenced by the type of oligomers. The solvent uptake shows large dependence on the timing of the measurement. Measurements carried out after 48 hr of polymer production showed constant solvent uptakes, indicating that the final structure of the polymer was formed.
通过测量在不同极性溶剂中处理24小时、48小时和72小时后溶胀溶剂的吸收量，研究了由不同粘度的硅低聚物制成的四种弹性体的极性。溶剂吸收为基质内部的极性提供了良好的表征。根据结果，低聚物被分为两组。相同的方法已用于研究含有各种极性和非极性液体成分的样品内部极性的变化。结果表明，基质内部的极性与溶胀性能有关。所使用的成分改变了基质框架，这也受到低聚物类型的影响。溶剂吸收量对测量时间有很大依赖性。在聚合物生产48小时后进行的测量显示溶剂吸收量恒定，表明聚合物的最终结构已形成。
