Properties of Water-Swellable Compounds Based on Nitrile Rubber With Varied Acrylonitrile Content

Abstract

This article examines the development of water-swellable rubbers for oil and gas production packer equipment. The object of the investigation is to document the effect of rubber's acrylonitrile content on the swelling of the elastomers modified with sodium-carboxymethyl cellulose and a copolymer of acrylamide and potassium acrylate. After testing the samples at room temperature, the most influential factor in a material's swelling was discovered to be the mineral content in the liquids imitating well fluids. NBR polarity stemming from the inherent CN-group level was not explicitly detected to affect the swelling rate and maximum ratio under the described conditions of the experiment. It was determined that in sodium chloride aqueous solutions with concentrations from 3 to 22%, swelling of nitrile rubber mostly depends on its cross-linking degree.

Influence of Partially Carboxylated Powdered Lignocellulose from Oat Straw on Technological and Strength Properties of Water-Swelling Rubber

“…The obtained product was filtered in a vacuum filter, and then dried in air. As a polymer base for creating sleeves for swelling packers, oil-and gasoline-resistant thermostable nitrile butadiene rubber (NBR) is widely used [42][43][44]; synthetic isoprene rubber, methyl-styrene-butadiene rubber, ethylene propylene rubber and their mixtures are used to a lesser extent [45][46][47]. In this work, nitrile butadiene rubber grade BNKS-28 AMN was used.…”

Preparation and characterization of hydrophilic and water‐swellable elastomeric nanocomposites

“…[1,2,17] Generally, elastomers do not swell in water irrespective of their polarities. Vaniev et al [27] carried a study on the water swelling behaviors of NBR, it was observed that the polar moieties (acrylonitrile content) of NBR did not have any serious influence on it water-swelling properties. Thus, water swelling of elastomers can only be achieved through careful engineering.…”