Changes in the physicomechanical properties of nitron fibre during the metallization process

Conclusions The effect of metallizing conditions and of deposited metal content on the physicomechanical properties and heat-resistance of original and metallized fibre specimens has been investigated.It has been found that heat-treatment under the conditions of metallization or the introduction of metal up to 4.2% by wt. essentially does not impair the strength characteristics of the fibre, and considerably improves its elastic properties.The heat-resistance of the metallized fibres exceeds that of the original Nitron fibre.Tashkent Institute of Textile and Light Industry. Translated from Khimicheskie Volokna, No. 1, pp. 22–23, January–February, 1987.     

Changes in the structural-mechanical properties of nitron fibre during the metallizing process

Conclusions The effect of metallizing conditions and Ni content on the structural and mechanical properties of Nitron fibre has been investigated.It has been shown that the metallization temperature-time regime leads to changes both in the amorphous and also in the crystalline regions of PAN fibre; these are connected with a compaction in polymer structure.The Ni content of the fibre significantly affects its structure and thermomechanical properties. The suggestion has been made that the considerable increase in glass point of the fibre is caused by chemical interaction between polymer functional groups and the metal.Translated from Khimicheskie Volokna, No. 6, pp. 39–40, November–December, 1986.     

Improving the cohesion of nitron fibre

Conclusions It has been established that increase in cohesion of the fibres depends not only on the amount of sorbed latex but also on the character of the distribution of the latex particles on the surface of the fibre.Tashkent Textile and Light Industry Institute. Translated from Khimicheskie Volokna, No. 3, pp. 13–15, May–June, 1969.     

Interaction of nonionogenic surface-active substances with nitron fibre

Conclusion The kinetic and thermodynamic parameters of the interaction of Nitron gel-fibre with aqueous solutions of sorbitan S and sorbital S-20 have been determined. It has been shown that the entropy of sorption of nonionogenic surface-active substances does not depend on temperature in the 25–75°C region.The amount of SAS encapsulated in the fibre affects the dynamics of sorption of cationic dyes, being one of the factors causing the appearance of dyeing nouniformity.Translated from Khimicheskie Volokna, No. 6, pp. 17–19, November–December, 1985.     

Effect of surface-active substances on the fibre-forming process and properties of nitron fibre

Conclusions The effect of surface-active agents on the surface tension of polyacrylonitrile (PAN) spinning solutions has been studied.It has been found that introducing SAS into the precipitation bath increases fibre-formation stability. The use of SAS as modifying additives to the spinning solution and into the precipitation bath leads to an increase in the uniformity of spun fibre properties.The possibility of reducing the linear density of Nitron fibres on introducing SAS into the spinning solution and the precipitation bath has been demonstrated.Translated from Khimicheskie Volokna, No. 3, pp. 24–26, May–June, 1985.     

Surface modification of nitron fibre with natural silk waste

Conclusions The effect of a content of wastes from natural silk in solution on the process of morphological modification and on the physicomechanical properties of PAN fibre has been studied.It has been found that, as a result of modifying nitron fibre, its ability to undergo processing on textile equipment and its comfort are improved.DeceasedTranslated from Khimicheskie Volokna, No. 3, pp. 44–45, May–June, 1993.     

Effect of additives on the thermal properties of nitron fibre

Conclusions The effect of treating nitron fibre with ethylendimaine, cadmium sulfate, and also with a complex from these compounds has been studied by thermographic methods.It has been found that treatment of nitron fibre with these compounds leads to a loosening of its structure, as is indicated by the reduction in the maximum polycyclization temperature and the expansion of the temperature range.Translated from Khimicheskie Volokna, No. 3, pp. 31–32, May–June, 1984.     

Alkaline hydrolysis of nitrile groups in hydrazided nitron fibre

Conclusions The process of alkaline hydrolysis of nitrile groups in hydrazided Nitron fibre has been studied. It has been shown that introduction of hydrazidine groups into the polymer chain catalyzes the alkaline hydrolysis process because of a change in the basicity of the polymer chain.A cation-exchange VION KN-1 fibre has been prepared with higher physico-mechanical properties, which still retains satisfactory sorptive properties.Translated from Khimicheskie Volokna, No. 3, pp. 7–8, May–June, 1988.     

Detoxification of cyanide in wastewater from the manufacture of nitron fibre

Conclusions The method of detoxifying cyanides with hydrogen peroxide in the presence of copper sulfate has been investigated as applicable to wastewater from the manufacture of Nitron fibre.Optimum proportions of hydrogen peroxide and copper sulfate have been found.Translated from Khimicheskie Volokna, No. 6, pp. 25–26, November–December, 1984.