耐油橡胶接头的超能性能分析
耐油橡胶接头是在一般橡胶接头的基础上研发的特殊材质橡胶接头，这种橡胶接头一般采用丁晴橡胶，丁腈橡胶接头是由丁二烯和丙烯腈经乳液聚合法制得的，丁腈橡胶主要采用低温乳液聚合法生产，耐油性极好，耐磨性较高，耐热性较好，粘接力强。其缺点是耐低温性差、耐臭氧性差，电性能低劣，弹性稍低。
丁腈胶最大的用途是生产耐油胶管及阻燃输送带，其消耗量约占总消费量的50%;其次是密封制品，其中约半数为汽车密封制品;在电线电缆、胶粘剂、印刷和箱包制品等方面也有应用。另外，丁腈胶与其他材料共混改性成为目前研究热点。利用动态硫化技术等技术，可以制备丁腈胶/聚氯乙烯、丁腈胶/聚丙烯、丁腈胶/乙丙胶、丁腈胶/聚苯乙烯、丁腈胶/氯磺化聚乙烯、丁腈胶/聚酰胺、丁腈胶/丁基胶等共混产品，其中丁腈胶/聚氯乙烯共混胶用途最广泛，主要应用于电线电缆行业。随着通讯业快速发展，在海底电缆领域对乙丙胶/聚丙烯有较强竞争力。目前国内有近万家电线电缆企业，每年丁腈胶/聚氯乙烯消耗量很大。另外，该共混胶还可以用于油管和燃油管外层胶、汽车防水密封件和模压零件、发泡绝热层、胶圈。
丁腈橡胶接头由普林森自主开发的耐高温耐油污橡胶接头，经过长期的实验测试才推向市场，所以我们的高温橡胶接头无论在任何环境下使用都不会发生脱胶，起翘的现象，目前广泛用于蒸汽管道，热水管道，高温粉料管道。 各种耐油橡胶接头用耐油橡胶的配合体系：
1.硫化体系：
总的来说，提高交联密度可以改善硫化胶的耐油性。在氧化燃油中，用过氧化物或半有效硫化体系硫化的丁晴橡胶，比硫磺硫化的耐油性好。过氧化物硫化体系硫化的丁晴橡胶，在40度稳定性最好，在125度的氧化燃油中则不理想。而用氧化镉和给硫体系统硫化的丁晴橡胶，在125度的氧化燃油中耐长期热老化性能较好。
2.填充体系和增塑剂：
增加碳黑和白碳黑可以提高耐油性。软化剂应该选用不易被油类抽出的软化剂。最好选用低分子聚合物，如低分子聚乙烯，氧化聚乙烯，聚酯类增塑剂和液体橡胶等。极性大，分子量大的软化剂或增塑剂，对耐油性有利。
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The performance analysis of super oil resistant rubber joint
Oil resistant rubber joint is in general rubber joint based on the research and development of special material of rubber joints, the rubber joint is commonly used NBR rubber, nitrile rubber joint is from butadiene and acrylonitrile by emulsion polymerization method of, nitrile rubber mainly uses the low-temperature emulsion polymerization production, excellent oil resistance, high wear resistance, heat resistance is good, strong adhesion. The disadvantage is that low temperature tolerance, poor resistance to ozone, poor electrical performance, low elasticity.
The best use of nitrile rubber is producing high oil hose and flame retardant conveyor belt, consumption accounts for about 50% of the total consumption; the second is sealing products, about half of them for automotive sealing products; in the wire and cable, adhesive, printing and bag products is also applied. In addition, nitrile rubber and other materials have become a hot blending modification. The use of dynamic vulcanization technology, preparation of NBR / PVC, nitrile rubber / polypropylene, acrylonitrile butadiene rubber / EPDM rubber, nitrile rubber / polystyrene, NBR / chlorosulfonated polyethylene, butadiene nitrile rubber / polyamide, nitrile rubber / butyl rubber blends products, which NBR / poly vinyl chloride blends uses the most widely, mainly used in wire and cable industry. With the rapid development of the communications industry, in the field of submarine cable of EPDM / PP with strong competitiveness. At present, there are nearly 10000 wire and cable business, the annual consumption of NBR / pvc. In addition, the blends can tube outer glue, the car waterproof sealing parts and molding parts, foam insulation layer, aprons for hose and fuel.
Nitrile rubber joints by Pu Sen independently developed high temperature resistant oil resistant rubber joints, through the long-term test to push the market, so our high temperature rubber joint no matter in any environment is not going to happen, degumming, become warped phenomenon, is currently widely used in steam pipe, water pipe, powder at high temperature pipeline. Coordination system of oil resistant rubber for all kinds of oil resistant rubber joints:
1 curing system:
In general, increasing the crosslinking density can improve the oil resistance of vulcanized rubber. In the oxidation of fuel, with peroxide or semi efficient curing system of vulcanized rubber rubber, better than sulfur vulcanization of good oil resistance. Peroxide curing system curing rubber rubber, the best in 40 degrees, in the 125 degree of oxidation of fuel is not ideal. In the 125 degree of oxidation, the thermal aging property of the rubber, which is used in the oxidation of cadmium and sulfur system, is better.
2 filling system and plasticizer:
Increase of carbon black and white carbon black can improve oil resistance. Softener should be used is not easy to be out of the oil softener. It is best to use low molecular weight polymers, such as low molecular weight polyethylene, polyethylene oxide, polyester plasticizer and liquid rubber. Very large, large molecular weight softener or plasticizer, beneficial to oil resistance.
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This picture, written by Shanghai Songjiang group of high temperature resistant rubber joints http://www.shnxxjjt.com/xjrxjt/
