Modified polypropylene yarns from oriented film for manufacture of goods for national consumption and technical articles

Conclusions A technological process has been developed for preparing modified film yarns from a mixture of polypropylene and low density polyethylene having a content of the latter up to 10% by wt.; these yarns are used to make goods for national consumption or technical articles, with an economic advantage of 50 rubles per metric ton of yarn.When small additions of LDPE are introduced into polypropylene, an increase in the degree of yarn stretch is observed.The suggestion has been made that small additions of LDPE heal defects in the structure of oriented polypropylene, which is prone to spontaneous fibrillation; this aids in obtaining yarns with increased strength, elasticity, and lower tendency to split.Translated from Khimicheskie Volokna, No. 1, pp. 45–47, January–February, 1989.     

Preparation of a fibre-forming sulfonic acid copolymer and its properties

Conclusions The basic principles in synthesis of a fibre-forming sulfonate group-containing copolymer have been established.It has been shown that the sulfonate group content of a copolymer shows up in its properties and the properties of its dilute solutions.Translated from Khimicheskie Volokna, No. 2, pp. 16–17, March–April, 1988.     

Effect of the pulsations of a liquid on the averaged motion of a suspended particle

It is shown that particles moving in a pulsating flow with relative velocities extending outside the normal Stokes range acquire average velocities differing from those normally associated with sedimentation.Deceased.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 19, No. 5, pp. 837–843, November, 1970.