COMPENSATION TENSION AS ADDITIONAL CRITERION FOR THE VALUATION OF PAN PRECURSOR FIBERS

Fibres made from poly(acrylonitrile-co-methylacrylate-co-itaconic acid) were stretched under different conditions. The overall degree of orientation as well as the degree of orientation and amount of the paracrystalline regions were evaluated; mechanical properties were investigated. The correlation between the values obtained and the so-called compensation tension of the fibres leads to the conclusion that the latter is a measure for the inner tension of the fibres and renders possible improvements in preparation and processing of the fibres.