COMPENSATION TENSION AS ADDITIONAL CRITER ION 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 ori entation as well as the degree of orientation and amount of the paracr ystalline regions were evaluated; mechanical properties were investiga ted. The correlation between the values obtained and the so-called com pensation tension of the fibres leads to the conclusion that the latte r is a measure for the inner tension of the fibres and renders possibl e improvements in preparation and processing of the fibres.