Determination of polarity parameters for glass fibres by inverse gas chromatography: Some results and remarks

Glass fibres of various surface properties (sized and unsized ones) have be en investigated in this work by means of inverse gas chromatography (IGC) a t infinite dilution conditions in the 30-100 degreesC temperature range. Th e conclusion is made that the IGC method is too sensitive to give an unambi guous description of the complex character of heterogeneous glass fibres. P ossible reasons are discussed with a critical consideration of our own resu lts and the corresponding literature data. The polarity parameters have bee n calculated by means of various theoretical approaches. It was found that the polarity parameters based on topological indices, according to Brendle and Papirer, were able to describe more correctly the Lewis acid-base surfa ce characteristics than previous approaches.