Nitrile rubber (NBR) is a random copolymer. The raw rubber is copolymerized by butadiene and acrylonitrile by the emulsion polymerization method. It is made after sulfur vulcanization and carbon black reinforcement. It has excellent oil resistance, Heat resistance, solvent resistance, air tightness, cold plasma treatment device can solve the problem of adhesion of nitrile rubber materials, widely used in aviation, automotive and petroleum industries and other territories.

Cold plasma processor
        The mass fraction of acrylonitrile in NBR508O is as high as 50%. It is a special sealing material for aviation kerosene. When it is in contact with aviation kerosene for a long time at high temperature, kerosene molecules will gradually penetrate into the cross-linked network of nitrile rubber, changing the molecular structure and causing performance degradation. Even a safety accident occurred. Therefore, further improving the oil resistance of NBR5080 is an important issue for improving the life of aviation equipment.
        Polytetrafluoroethylene (PTFE) has good chemical stability and resistance to chemical media in plastics. Surface modification to bond PTFE on the surface of NBR5080 to further improve the media resistance of NBR5080 is an effective method.
        Cold plasma treatment equipment has received more attention because it can improve the surface properties of polymer materials without affecting the overall performance. After treating EPDM and fluorosilicone rubber (FS6265) with cold plasma technology, it was found that oxygen-containing groups appeared on the rubber surface and the wettability was improved.
        Adopt three kinds of gases, such as Ar, air and O2, to carry out the plasma treatment process of cold plasma treatment instrument on NBR5080. Through the research and analysis of contact angle, surface morphology, surface elements and changes in bonding properties, the CPT process parameters that can improve the surface wettability of NBR5080 are found.
        The cold plasma treatment of O2 gas is performed on PTFE to solve the problem of low surface free energy and inability to make the material adhere. This is because after the cold plasma treatment, the surface of NBR5080 is in an unstable high-energy metastable state. On the one hand, the energy of the high-energy state will spontaneously change to the low-energy state, and the polar groups on the rubber surface will flip to the inside, and the internal molecular chain segments Migration to the surface, this migration will continue until the surface of the material reaches a dynamic equilibrium state. On the other hand, the surface of the high-energy metastable state reduces the energy of the surface by adsorbing small molecules in the air. The attenuation of the plasma treatment effect is the dynamic reorganization of the surface of the material.
        After cold plasma treatment, the surface roughness of NBR5080 increases, the surface energy increases, the original stable groups become active groups, and the bonding performance is improved.
        1) Cold plasma treatment can improve the surface wettability and surface energy of NBR5080;
        2) Cold plasma treatment increases the surface roughness of NBR5080;
        3) Cold plasma treatment improves the bonding performance between NBR5080 and PTFE.