Polarity increase during polymer

The content of polymers and polar components in oils increases during frying process. Size exclusion chromatography and HPLC may be used for the analysis of such components. The content of polar lipids should not exceed about 20%. 

Finally, the dielectric properties of a nonpolar polymer are modified by inclusion of even small amounts of a polar comonomer. In coatings applications the presence of polar repeat units in an otherwise nonpolar polymer reduces the tendency for static buildup during manufacture, printing, and ultimate use. On the other hand, in dielectric applications this increases the power loss and must be kept to a minimum, even to the exclusion of polar initiator fragments. 

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