vest_logo_eng.png

Vestnik of
Vitebsk State
Technological
University

ru gb

ISSN: 2306-1774 (Online)

ISSN: 2079-7958 (Print)

раб. тел.  +375 212 495338

 
 

 

Поиск по сайту

vakRB_sm.png

logo-eLibrary.jpg

DOAJ_logo.jpg

OAJI Vestnik of VSTU

plus2.png

kiberleninka_sm.png

readera.png

index_copernicus.jpg

Google_Scholar.png

issn_sm.jpg

 
 

Study of the Influence of Formation Conditions on Dyeability of Gel-Fibers Made from Copolymers of Acrylonitrile, Methyl Acrylate and Itaconic Acid


UDC 677.494.745.32:677.027.423

https://doi.org/10.24411/2079-7958-2020-13912

Authors


 
 

Abstract


The aim of this work was to study the effect of the acid comonomer content and the spinning conditions on the coloring of gel fibers based on copolymers of acrylonitrile (AN), methyl acrylate (MA), and itaconic acid (ITA). Model copolymers AN, MA, and ITA with an acid comonomer content in the monomer mixture from 0 to 2 % (weight) due to a change in the MA fraction were synthesized. The correlation between the loading of the acid monomer into the reactor and the real amount of the same monomer that entered the copolymerization reaction was estimated by the sorption of methylene blue dye by films of model copolymers. It was found that the content of ITA in the copolymer is lower than the content of ITA in the initial polymerization mixture. Using a bench spinning machine based on the synthesized copolymers, samples of model fibers were obtained by the dimethylformamide method.

The study of the coloring of polyacrylonitrile fibers in the gel state showed that the amount of sorbed dye is directly proportional to the content of ITA in the copolymer and does not depend on the temperature of the precipitation bath. It was found that the whiteness index (lightness) practically does not depend on the temperature of the precipitation bath, but to a greater extent is determined by the content of acidic comonomer in the copolymer. The maximum decrease in the whiteness index is observed with an increase in the content of ITA in the copolymer from 0 to 0.7 %. A further increase in this indicator to 1.79 % leads to an almost linear decrease in the whiteness index from 11–14 to 7.4–7.8 %.

Study of the Influence of Formation Conditions on Dyeability of Gel-Fibers Made from Copolymers of Acrylonitrile, Methyl Acrylate and Itaconic Acid

keywords


Выходные данные


Pchelova, Natallia Study of the Influence of Formation Conditions on Dyeability of Gel-Fibers Made from Copolymers of Acrylonitrile, Methyl Acrylate and Itaconic Acid / Natallia Pchelova, Leonid Shcherbina, Iryna Haradniakova, Iryna Budkute  // Vestnik of Vitebsk State Technological University . ─ 2020. ─ № 2(39). ─ P. 118. DOI:10.24411/2079-7958-2020-13912

Accepted to publication on december 1, 2020