The Study On The Properties Of NR/BR/NBR Blends

This topic is mainly on the properties of NR/BR/NBR blends,Through a series of tests,finally the best NR/BR/NBR belends performance is obtained.The first part studies the effect of different dosages of NBR on NR/BR blends properties,to determine the basic formula of each phase of NR/BR/NBR belends;Using ordinary sulfur vulcanization at various accelerator systems for NR/BR/NBR blends curing characteristics, the physical properties, heat,dynamic compression, mechanical properties is researched; On this basis, our researchs are mainly focused on the CB-Silica hybrid filler reinforcing system for filling reinforced mechanical properties, dynamic mechanical properties;Finally the different compatibilizers are added to improve the rubber compatibility,reducing the interface, improving the overall mechanical properties and dynamic performance for rubber blends, and has conducted comparative analysis.The conclusion shows when NBR is adding 10 phr, the blends have good properties;Because of the two accelerators synergy effects, crosslinked network structure will be improved,So using the accelerators used in ordinary vulcanization sulfur vulcanization system better than the effect of a single promoter is used and using accelerator NS/M the physical mechanical properties and dynamic mechanical properties of vulcanized system best; As for the CB-Silica hybrid filler, When the silica content of 20 phr, the blends have better mechanical properties,Panye effect is low.When the addition of the compatibilizer EVM is added,The compound compatibility becomes better, the blends have better mechanical properties, especially EVM is added 2 phr, the compound have best compatibility.When using OMMT as compatibilizer,the rubber chains inserted into the lamellar structure,phase interface decreases, the amount of OMMT was 3 phr, the compatibilization effect is the best.