Ключевое слово: «frost resistance»

This work aims to study of rubbers based on nitrile butadiene rubber modified with carbon nanotubes (MWCNT) to increase their frost resistance. The Arctic is one of the most important regions of our planet, where resource and transport employment is rapidly de-veloping. In the harsh climate, various classes of equipment are available for Arctic exploration. Such products cannot do without rubber products, which are subject to serious requirements. This year turned out to be extremely cold for Yakutia, which led to failure of the rubber products on machines. This once again confirms the importance of formulating rubber compounds for extremely low temperatures. It is known that the side properties depend on the generally accepted methods of chemical and physical networks of vulcanizates [1].

In this work, collagen hydrolysate is used as a multifunctional additive that comprehensively improves the properties of synthetic BNKS-18 butadiene-nitrile rubber. For the first time, the dependence of an increase in the equilibrium modulus of elasticity on the density of the mesh with an increase in the frost-resistant characteristics of the material was determined. The scientific novelty of introducing collagen hydrolysate into rubber consists in its effective use as a “plasticizer”, providing an increase in the frost resistance of materials without compromising their physical and mechanical characteristics.

Elastomeric material has been developed for arctic applications, consisting of butadiene-nitrile (BNKS-18), butadiene (SKD-L), and isoprene (SKI-3) rubbers. This rubber was subjected to full-scale climatic tests in Yakutsk, Republic of Sakha (Yakutia). Over the course of one year, properties such as physical and mechanical characteristics, compression set coefficient of frost resistance (Kv), swelling degree, and plasticizer content were analyzed using infrared spectroscopy. The experiment showed that there were no critical changes in most of the studied parameters. However, the results indicated a slight decrease in tensile strength by 22% and an increase in RCS by 20% at the beginning of the exposure. Kv significantly decreased by 70% due to the washing out of the plasticizer, stabilizing at a level of 0.13, compared to ~0 for industrial rubbers based on BNKS-18 in similar harsh conditions of a sharply continental climate. The low-temperature elasticity of the material can be attributed to the SKD-L and SKI-3 rubbers, which are not leached by the working environment (petroleum from the Talakan field) and therefore maintain high frost resistance.

This research investigates the impact of different types of softeners on the frost resistance of rubber products made from epichlorohydrin rubber CG205. Frost resistance is a crucial property for rubber applications in Arctic and Far North regions, where extremely low temperatures are common. To enhance flexibility and durability, various plasticizers were tested, including dibutyl phthalate (DBP) and a newly developed plasticizer called TAD-ZhK (ТАД-ЖК). Results revealed that both softeners improved the relaxation properties of the rubber at subzero temperatures, although DBP provided better results than TAD-ZhK. The findings highlight the importance of selecting appropriate softeners to ensure reliable performance in demanding environmental conditions.