Structural transformations in acrylic fibers

Abstract

In previous works the influence of wet and dry thermal treatments in the structure of acrylic fibers was studied. The changes on the fiber structure were analised mainly on the basis of indirect methods, namely by differential solubility tests, dyeing properties, density, tensorial properties, birefringence and I.R. spectrum. The present work intends to prove by direct methods all the hypothesis which were drawn to support the fiber structure changes detected when the fibers were submitted to a large range of thermal treatments, either dry and wet. Radio – frequency treatments were also carried out.