Dyeing of AMPS Based Polyacrilic Fibers

Abstract

Increased use of polyacrilic fibers in textile industry is due to its improved dyeing ability, as the result of the incorporation of small amounts (3-5 %) of copolymers, which open the compact structure of the fiber, introduce additional acid or alkali groups and increase dyeing affinity towards certain groups of dyestuffs. AMPS based polyacrilic fibers are a new product of OHIS, Skopje. It is a fiber in which itaconic acid, as an acidic comonomer (in Malon fiber) is substituted by 2-acrylamido-2-methyl-propane sulphonic acid, which gives new and improved properties to the fiber. Dyeing properties of AMPS fibers were investigated by tracking TG in dyeing and DCS analysis, saturation value (Sf), diffusion coefficient (D), pH impact on absorption of basic dyes, thermal stability, as well as mechanical properties, and comparison was done with the properties of Malon fibers, a standard product of OHIS, Skopje. AMPS fiber has lower Tg, lower Sf, pH has no impact on basic dyestuff exhaustion, its dyeing rate is higher, and thermal stability lower in oxygen and higher in inert media. It can be dyed in more brilliant hues compared to Malon fiber.